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PICList Thread
'pic learning curve'
1994\01\07@152926 by jory

1994\01\07@161027 by n J Dienhart; 691-4481; Security Shift Supervisor)n/a

Jory:

I'm glad you sent your message via the Internet, the local connection to the
PIC BBS is no longer working (I don't know why), so I haven't been logging on
there.

Anyway, it appears that you might be at the same juncture I was a few months
ago. I am a long way from really knowing Assembly code or the PIC. However, by
charting a certain goal, I have managed to "pick" up a few things that'd
gotten me started in the right direction. Just as you have noted, I too had
hardware ready and waiting for a PIC to be "plugged in". So, here's what I
did:

1. Sent out as many "help" requests as I could (looks like you have already
started).
2. Sorted out the "help" responses and used the "best qualified" advice.
3. Sought (and got) a lot of help building the application code (Assembly)
that met the needs of my hardware (cuz' I understand the hardware already).
4. Plugged in my PIC programmer to a computer and examined the code with a
simulator (PICSIM), to better understand what was going on in the PIC. This
was probably my biggest learning experience yet.
5. Assembled the code (from ASCII text to the various formats (ASM, BIN,
etc.), and studied what each looks like/is used for, etc.
6. Programmed a PIC (OTP type).
7. Put my hardware on a Proto-Board and plugged in the PIC to simply
"discover" what happens (it worked, mostly).
8. Fooled with the (ASCII) code and re-assembled it until the end result met
my desires (several times through this step).

So that's what I have done. I am not yet comfortable with the
code/programming, but I have learned that pure persistence will make up for a
lot of the programming knowledge I don't already have. As you know, most of
the PIC manuals, etc., look like they're written in some cryptic code. Well,
they are. My initial stumbling blocks were almost too simple for others to
grasp. Things like ....what format is the code supposed to be in when I type
out my program in ASCII text before assembling it, should I used the PIC
code or somebody else's (like Parallax's set of instructions), how do I know
how much code fits into the finite memory space, and so forth. I got answers
to these questions by doing the things noted here.

My "trial and error" has helped me complete my first PIC project. But as I've
said, I had an individual help me put together a relatively complex assembly
program. My next big step (which I'm working on) is to apply what I've learned
to put together another program from ground zero.

Since I'm mostly into hardware, I was a little uncomfortable in using the best
advice I received about programming PICS, "just go for it" (software generally
doesn't make any smoke). Any fatal errors will show up using PICSIM or at the
window of a Volt meter.

Don't hesitate to scratch me back a note whenever you want, we'll both likely
learn something.

Regards,

Shawn Dienhart
spam_OUTSJD2TakeThisOuTPGE.COM

805-545-4481

'mac pic develpoment '
1994\01\11@190424 by jory

'pic/mac guy '
1994\01\12@131959 by jory

'other local pic user from bbs '
1994\01\17@174850 by jory

'pic learning curve'
1994\01\18@155016 by n J Dienhart; 691-4481; Security Shift Supervisor)n/a

'aspic/bbs?'
1994\01\27@005307 by Don Lekei

A few months back, I solicited interest in an email list covering pic
(uchip) microcontrollers. A fair number of people responded positively.

After much slothage, I finally got something set up: .....picKILLspam@spam@figment.mit.edu

A few things:

1. This list could go away at any time.

2. For the time being, please send list addition/removal requests to the
list iteself. Within the week, there should be a separate address to deal
with administrative issues.

3. It may take a few days to get added-to/removed-from the list. Your
patience is appreciated.

4. Please don't widely publicize the list until the
administration/operational details are finalized later this week.


-jory bell

'Getting acquainted'
1994\05\11@093219 by byron

'Getting acquainted '
1994\05\11@095743 by John Sevinsky

' Date: Wed, 11 May 94 12:54:48 -0400 From: roman'
1994\05\11@125449 by roman

'stamp mailing list '
1994\05\11@142210 by jory

Someone emailed me and pointed out that my previous post neglected to
include the subscription address to the other mailing list (STAMP/PIC):

stamp-requestKILLspamdiscus.mil.wi.us

-jory

'Serial Programmers'
1994\05\11@183214 by Don Lekei

In-Reply-To:  .....jsevinskKILLspam.....spd.dsccc.com

> ... It would be nice if it used the serial port,
>  so those of us with non-IBM-PC computers can use it....

I have been using a serial programmer for years which is completely ASCII
controlled and quite portable. It's from Baradine Products in North
Vancouver, BC. And it's not very expensive. It programs EPROMS, EEPROMS,
and microcontrollers including PIC 5X, 7X, 8X, 17c42 (and 6X is comming).
It uses the serial mode for 6x+ parts so you can use it for in-circuit
programming.

I have written a (sorry, DOS) based command line programmer for it (so it
can be used from a makefile) which is available on the MICROCHIP BBS.

Without trying to sound like an ad (I am not in any way connected with
Baradine) they can be contacted at 800-668-7886 (north america) or (604)
988-9853.

Don

'PISstart % serial I/O (mac) '
1994\05\12@124910 by jory

'omission in last msg.'
1994\05\17@002751 by jory

the last message should have directed administrative
matters to:

EraseMEpic-requestspam_OUTTakeThisOuTfigment.mit.edu

oops,

jory

'pic programmer'
1994\05\17@073043 by 93701195

1994\05\17@083512 by byron

'Give help to a PIC newcomer!'
1994\05\17@084218 by byron

'pic programmer'
1994\05\17@095102 by -robotics-research-centre.salford.ac.uk (Ian King)n/a

1994\05\17@095218 by -robotics-research-centre.salford.ac.uk (Ian King)n/a

1994\05\17@112820 by byron

'Give help to a PIC newcomer!'
1994\05\18@163550 by Peter Knight

On 17 May 1994, Don Lekei wrote:

> It is always better to get used to the manufacturer's mnemonics as any code
> examples or help you get from others is likely to be in that form. A good
> macro assembler will allow you to generalize your code to make it more
> portable.

I take your point as a general idea, but come on - ADDWF f,d where d is
*direction*!!! Whats wrong with ADD f,W / ADD W,f?

Ive programmed Z80, 6502, 8051, 77C82, ARM2, 68000 - and I have to say
that the PIC has the least user friendly mnemonics of the lot.

Still - Im sure I'll get used to them in time...


Peter
-
Peter Knight      Email: p.j.knightspam_OUTuk.ac.bradford      Mono: Cathedrow
                                          _  _          _            _
Who says you can't display letters on a 7 |   _| |_ |_  |_| _|  _  _  _|
segment display? OK, so you can't do a W..|_ |_| |_ | | |_ |_| |  |_| _|

'16C84 UK availability'
1994\05\18@164932 by Peter Knight

Im having severe problems getting hold of the PIC16C84 in the UK - Maplin
dont have any in stock, and reckon the entire UK wont get stock of them
for months.

I take Maplin advice with a pinch of salt - but even Farnell, who I also
tried, were out of stock for 4 weeks at the very least.

Where can I get my hands on a PIC to test my newly assembled programmer?


Peter
-
Peter Knight      Email: @spam@p.j.knightKILLspamuk.ac.bradford      Mono: Cathedrow
                                          _  _          _            _
Who says you can't display letters on a 7 |   _| |_ |_  |_| _|  _  _  _|
segment display? OK, so you can't do a W..|_ |_| |_ | | |_ |_| |  |_| _|

'Give help to a PIC newcomer!'
1994\05\19@170303 by Don Lekei

'New PICs: 16C74 and 17C44 '
1994\05\24@115901 by eric

'Give help to a PIC newcomer! '
1994\05\24@121052 by eric

On 18 May 1994, Peter Knight <KILLspamP.J.KnightKILLspambradford.ac.uk> wrote:
> I take your point as a general idea, but come on - ADDWF f,d where d is
> *direction*!!! Whats wrong with ADD f,W / ADD W,f?

I agree with your comments about Microchip's syntax being suboptimal, but
I should point out that the ",d" doesn't specify the direction, it specifies
the destination.  While this may seem like a minor point, consider the
SUBWF instruction:

       SUBWF   FOO,W   ; W := FOO - W

       SUBWF   FOO,F   ; F := FOO - W

While discussing subtract instructions, I should point out that the SUBLW
instruction subtracts the contents of W *FROM* the literal, which is not what
people generally expect.

At first this seemed brain-damaged but then I discovered that it is useful.
If you want to take the two's complement of W, for instance, you can use

       SUBLW   0       ; W := 0 - W

If you want to subtract a literal from W, you can use the ADDLW
instruction with the two's complement of the literal:

       ADDLW   0feh    ; W := W - 2

Some assemblers will let you write this in a natural form:

       ADDLW   -2      ; W := W - 2

Cheers,
Eric

1994\05\24@161102 by Peter Knight

On Tue, 24 May 1994, Eric Smith wrote:

> On 18 May 1994, Peter Knight <RemoveMEP.J.KnightTakeThisOuTbradford.ac.uk> wrote:
> > I take your point as a general idea, but come on - ADDWF f,d where d is
> > *direction*!!! Whats wrong with ADD f,W / ADD W,f?
>
> I agree with your comments about Microchip's syntax being suboptimal, but
> I should point out that the ",d" doesn't specify the direction, it specifies
> the destination.  While this may seem like a minor point, consider the
> SUBWF instruction:

OK - my mistake - I did mean destination...

Thanks for the hint on SUBLW - I missed that subtle point!

Peter
-
Peter Knight      Email: spamBeGonep.j.knightspamBeGoneuk.ac.bradford      Mono: Cathedrow
                                          _  _          _            _
Who says you can't display letters on a 7 |   _| |_ |_  |_| _|  _  _  _|
segment display? OK, so you can't do a W..|_ |_| |_ | | |_ |_| |  |_| _|

'PIC Programmers'
1994\05\26@092854 by rca

Hello all,

I'm doing a degree in Information Technology at would like to get into
programming PICs.

I've obtained a copy of the MICROCHIP data book and details of their
development kits. Unfortunatly I cannot really afford the development kit, I
was looking at the PICSTART-16B at 125 UK pounds. Especially as I think I
can get assemblers etc. for my PC of the net and already have the data book.

SO, does anyone know of a cheaper programmer? Ideally it will be able to
program 16C5X, 16C71 and 16C84 devices and be PC based.

Alternatively does anyone in the UK have an "old" programmer that they want
to pass onto a student cheaply?

Thanks for any help you give,

Rafe

----------------------------------------------------------------
Rafe Aldridge - TakeThisOuTrcaEraseMEspam_OUTsirius.tn.rl.ac.uk
R65, Rutherford Appleton Lab,                      wwWWww
Chilton, Oxon, OX11 OQX, UK.                        o  o
------------------------------------------------ooO--(__)--Ooo--

1994\05\26@141609 by Peter Knight

On Thu, 26 May 1994, Rafe Aldridge wrote:

> SO, does anyone know of a cheaper programmer? Ideally it will be able to
> program 16C5X, 16C71 and 16C84 devices and be PC based.

I can throughly recommend 'pic84pgm.zip' off the Microchip BBS, or
available via Circuit Cookbook on ftp -
bode.ee.ualberta.ca:/pub/cookbook/comp/ibm/pic84pgm.zip

Its a very easy to make PC based PIC16C84 programmer.

(I have to admit - I havent actually tried it yet - My first batch of
PIC17C84's is still on back order... :-(  )

Peter
-
Peter Knight      Email: RemoveMEp.j.knightTakeThisOuTuk.ac.bradford      Mono: Cathedrow
                                          _  _          _            _
Who says you can't display letters on a 7 |   _| |_ |_  |_| _|  _  _  _|
segment display? OK, so you can't do a W..|_ |_| |_ | | |_ |_| |  |_| _|

1994\05\26@203647 by Tom

> Date:          Thu, 26 May 1994 19:12:14 +0100 (BST)
> From:          Peter Knight <P.J.KnightEraseME.....bradford.ac.uk>
> Subject:       Re: PIC Programmers
> To:            Rafe Aldridge <EraseMErcasirius.tn.rl.ac.uk>
> Cc:            RemoveMEpicEraseMEEraseMEfigment.mit.edu

> On Thu, 26 May 1994, Rafe Aldridge wrote:
>
> > SO, does anyone know of a cheaper programmer? Ideally it will be able to
> > program 16C5X, 16C71 and 16C84 devices and be PC based.
>
> I can throughly recommend 'pic84pgm.zip' off the Microchip BBS, or
> available via Circuit Cookbook on ftp -
> bode.ee.ualberta.ca:/pub/cookbook/comp/ibm/pic84pgm.zip
>
This won't handle the 16C5X series, but I'm currently designing
something for that. :-)
Catch22 ?               It uses a <pre-programmed> PIC.     <g>
Not to panic, I'll make it available at cost<ish>,  that is, to
people that talk nice to me. :-)
--
Cheers
                                     Tom

'Picstart and Mac's '
1994\05\28@084143 by ujonsson

'PISstart % serial I/O (mac) '
1994\05\28@142706 by ujonsson

'FAQ? '
1994\05\28@212156 by jory

1994\05\29@143944 by Tom

'FAQ fodder '
1994\05\31@183439 by jory

'Bloody FAQ !'
1994\06\02@183058 by Tom

Just a pre-first draft sampler to prove that it's under way. :-)
I'm waiting for input from Microchip themselves, but so far the
offical reaction has been somewhat underwhelming.
Oh, and don't you dare quote the whole bloody thing back at me !
8-)  

--------------------------- CHOP HERE ---------------------------
This article is a collection of information sources for the PIC
family of microcontrollers (and variants).

The following topics are addressed:

     0)  Index

     1)  ABOUT THIS FAQ
   1.1)  Who put this FAQ together?
   1.2)  How can I contribute to this FAQ?
   1.3)  What newsgroups will this FAQ be posted to?
   1.4)  Can I distribute this FAQ or post it somewhere else?

     2)  ABOUT THE PIC
   2.1)  The PIC microcontroller
   2.2)  PIC representatives and approximate prices

     3)  PIC Utilities
   3.1)  FTP sites for the PIC
   3.2)  BBSs that support the PIC
   3.3)  Programming languages (3rd Party)
   3.4)      -:-     hardware     -:-               -:-

   4)     PIC DOCUMENTATION
   4.1)  Periodicals that cover the PIC
   4.2)  Books on the PIC
   4.3)  Miscellaneous documentation on the PIC

     5)  What's next.



1)  ABOUT THIS FAQ

1.1)  Who put this FAQ together?

       The members of the PIC  NEWS LIST via RemoveMEpicspam_OUTKILLspamfigment.mit.edu
       i.e.  yourselves.

1.2)  How can I contribute to this list?

   Please, if you have any suggestions corrections or additions,
   notify me by E-MAIL.  :  RemoveMETomTakeThisOuTspamtakdsign.demon.co.uk   Thank you.
       

1.3)  What newsgroups will this FAQ be posted to?

   This FAQ will be posted to the following newsgroups:
         sci.electronics
         ???.?????

   The schedule for posting will be once a month.


1.4)  Can I post this FAQ to my local BBS?

   I am putting no restrictions on the use of this FAQ except - It
must
   be distributed in its entirety and no financial gain may be
realized
   from it.


2)  ABOUT THE PIC

Comments & Descriptive prose .... anyone ?

2.1)  The PIC microcontroller

   The PIC series are eprom based 8-bit microcontrollers
       developed by Microchip Technology
               <List of Addresses to go here >

2.2)  PIC Variants

               List required here

3)  PIC SOFTWARE

   This section includes pointers to software for the PIC.
       FTP sites and BBSs


3.1)  FTP sites for the PIC

               Currently checking.....

#    ftp.pppl.gov (formerly lyman.pppl.gov)
#    ftp.funet.fi (nic.funet.fi)
#    EraseMEinfospamspamBeGonecircellar.com - Email (not ftp)
#    luth.se
#    hpcsos.col.hp.com
#    ftp.kulnet.kuleuven.ac.be


3.2)  BBSs that support the PIC

               Mchipbbs, Don Lekei

3.3)  PIC programming languages (3rd Party)

Host m/c                PC

Prog. Name      ASPIC   Shareware `C' assembler  (reg = $100 CDN ($69 US))
               **DESIGNED** for embedded controller design
               the shareware license has an unusual clause absolving
               those who only use it for non-commercial purposes

Supplier/Author Don Lekei  < RemoveME72677.2623KILLspamcompuserve.com
               BBS at (Canada) (604) 597-3479
               - One assembler for 16c5X, 16c7X, 16c8X, 17c42
               - Compatable with PICSIM (MPSIM)
               - Compatable with MAKE, and with auto-error tracking editors
               - Many times faster than PICALC (MPALC)
               - Standard base notation (Intel & Motorola format)
               - CODE and FUNCTION macros
               - Auto register bank management
               - Text/data translation
               - Automaticly generates RETLW tables for text and data tables
               - Built-in version management and assembly control functions
               - user command-line switches
               - many other features
               -character set translation (eg. for LED, LCD, and On Screen
Displays)
               - bit labels, environment labels, etc.


-------------------------------------------------------------------------------------

Host m/c                Macintosh

Prog. Name      uASM

Supplier                Micro Dialects Inc,
               PO Box 190,
               Loveland, OH 45140,
               Ph: 513/271-9100.

Features:               An integrated text editor, assembler
               and communications modules. fully supports macros,
               automatic labels, local labels, conditionally assembly,
               includes to 10 level deep.
               The editor supports up to 10 open files at a time, full
               search and replace including grep searches,
               file size limited only by RAM available.  
               The emulator supports data transfer up to 38,400 baud.

               MDI is currently working on an upgradeto support the
               16C71, 84, 64, and 17C42.


-------------------------------------------------------------------------------------

3.4)  PIC Programming Hardware (3rd Party)

Product         programmer
Model           ????
Supplier                Beradine Products Ltd,
               PO Box 86757,
               North Vancouver,
               BC CANADA V7L4L3,
               Ph: 604/988-9853.

Contact         Gary Anderson

Features                RS-232 terminal serial port compatible programmer
               Supports communications up to 38,400 baud,
               stand-alone or host operation,


4)  PIC DOCUMENTATION


4.1) Periodicals that may cover the PIC.

   The Computer Applications Journal (Circuit Cellar Ink)
       - programming and construction articles
       - POB 7694, Riverton, NJ  08077-8784
       - FAX: (203)872-2204
       - Voice orders: (609) 786-0409
       - On-line orders (BBS): (203) 871-1988
       - Email orders: ken.davidsonSTOPspamspam_OUTcircellar.com
       - $21.95, $31.95 surface Canada and Mexico,
         $49.95 air all other countries

   Computer Design
       - industry announcements and trends
       - One Technology Park Drive, P.O. Box 990, Westford, MA  
01886
       - (508)692-0700

   The Computer Journal
       - programming and construction articles
       - PO Box 535, Lincoln  96648

   Dr. Dobbs Journal
       - programming articles, concepts and designs
       - 411 Borel Ave., San Mateo, CA  94402
       - (415)358-9500

   Electronic Engineering Times
       - industry announcements and trends
       - 500-B Bi-County Boulevard, Farmingdale, NY  11735
       - (516)293-3000

   Electronics Now
       - construction articles
       - Box 55115, Boulder, CO  80321-5115
       - $19.97 one year

   Elektor Electronics
       - programming and construction articles
       - World Wide Subscription Service Ltd
         Unit 4, Gibbs Reed Farm, Pashley Road
         Ticehurst TN5 7HE, England
       - 27 UK pounds
    or
       - Old Colony Sound Lab, P.O. Box 243, Peterborough, NH 03458
       - Tel. (603) 924-6371, 924-6526
       - Fax: (603) 924-9467
       - $57 USA and Canada per year

   Embedded Systems Programming
       - programming and systems design articles
       - Miller Freeman Publications
       - 500 Howard St., San Francisco, CA  94105
       - (415) 397-1881

   Microcomputer Journal (formerly Computer Craft)
       - programming and constructions articles
       - 76 N. Broadway, Hicksville, NY  11801
       - $18.95 one year, foreign $23.00, foreign air mail $76.00

   Midnight Engineering
       - 1700 Washington Ave., Rocky Road, CO  81067
       - (719)254-4553


4.2)  Books on the PIC

   I don't have much information on this, only that one exists.  I
   would greatly appreciate it if someone could provide a short
synopsis
   and the complete book name, as my copy has not been delivered
yet.
   [it's in the post, honest !]

4.3)  Miscellaneous documentation on the PIC

   MicroChip Technology Incorporated
       - application notes



5)  What's next.

   I'm working on it...... Suggestions welcome.


   I would like to thank the following individuals who have
contributed

               

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Copyright (c) 1994 by T.A.Kellett, all rights reserved.
_______________________________________________________
Tom Kellett    < spamBeGoneTomSTOPspamEraseMEtakdsign.demon.co.uk >

'Math functions'
1994\06\02@221835 by johnsonj

I am designing a simulator(using a pic) that does a slewing fuction.  It
is for a class project.  Here is my project.
I am makeing a device that will simulate the brakeing of a car.(well
sorta of).  Its not real accurate since I dont take into account a lot of
factors like variable weights and variable braking speeds but its a
project.  As a matter of fact its pretty close to a half-ass design.  But
once again, its all I have to do for the class.  
I give the pic a frequency(8 bit 255 in 1.3Hz increments, 70-400HZ) and
have a jump table that does the
Hz->clock cycles for me.  Now i have 5 bit slew rate(other 3 bits are
someting else) that represents my braking.  The slew is fixed at 330 to
8.3 Hz/sec.  Which translates into 255 to 8.3(?) cycles/second.  Well
here is my problem.  If I only adjust the pulses output per second once a
second it would simulate a vibrater more then a car stopping.  ie once
every second I would slow the car by 10.3 Hz or 330Hz.(like braking in a
YUGO :)  ok another flaw, brakes are not digital(I dont think) put play
with me.  My problem is I dont have and external clock for set time
interupts so I cant decrease the Hz evenly.  So i opted to do everything
on a pulse by pulse basis.  my problem is how do i find what 10.3 Hz(or
8.3 cycles) would add to my pulse period?  I have tried the divide
routines from microchip and found that they have too little acuracy and
generaly dont work worth a flip.  If you dont understand my question
email me, i will try to explain it better.
to sum it up
I need to translate 8.3 cycles/sec into a period to which I can add to
the Current period i am outputting.  this is a problem is the person is
driving at 300Hz and trys to stop at 8.3 cycles a sec(the amount i would
add to each period) then if the person was moving at 200Hz.  Also does
anyone have any math routines that work?  I could use them.
Help me please
       John

_____________________________________________________________________________
John Johnson                   |If it's not OS/2.|KILLspamjohnsonjspamBeGoneccwf.cc.utexas.edu
                              |It's crap!       |EraseMEjohnsonjEraseMEghostwheel.bga.com
OOOO SSSS    /2222  2222    11 |                 |
O  O S      /    2     2     1 |"We need breath- |"Bite me." Tom Servo
O  O SSSS  /  2222  2222     1 |-ing room!"      |
O  O    S /   2     2    ..  1 |     Bill Gates  |"I want to decide who lives
OOOO SSSS/    2222  2222 .. 111|                 |and who dies" Crow T. Robot
-----------------------------------------------------------------------------

1994\06\03@154529 by johnsonj

Yea, i had one bouncd.  Dont remeber where from though.  It said no
server responce.  probable just a downed mail server if i had to guess.

Fri, 3 Jun 1994, jory bell wrote:

{Quote hidden}

> hi,
>
> i manage the pic list, and i was wonderin if you had any trouble with
> posting, or any odd bounces, etc. I am trying to track down a problem.
>
> thanks,
>
> jory
>
>
>

_____________________________________________________________________________
John Johnson                   |If it's not OS/2.|@spam@johnsonj@spam@spam_OUTccwf.cc.utexas.edu
                              |It's crap!       |spamBeGonejohnsonjKILLspamghostwheel.bga.com
OOOO SSSS    /2222  2222    11 |                 |
O  O S      /    2     2     1 |"We need breath- |"Bite me." Tom Servo
O  O SSSS  /  2222  2222     1 |-ing room!"      |
O  O    S /   2     2    ..  1 |     Bill Gates  |"I want to decide who lives
OOOO SSSS/    2222  2222 .. 111|                 |and who dies" Crow T. Robot
-----------------------------------------------------------------------------

1994\06\03@190021 by Don Lekei

1994\06\03@200116 by johnsonj

I have solved my problem..  I just quite thinking in terms of HZ and went
to cycles.  Also i got some math routines to work(not bloating but 16bit
at least).  Aslo i did some calculations on my frequencies and found that
this car would be moving between 800mph-2500mps(thats hauling ass).  
Needless to say no cop would ever catch ya.
later
       John

_____________________________________________________________________________
John Johnson                   |If it's not OS/2.|.....johnsonjspam_OUTccwf.cc.utexas.edu
                              |It's crap!       |TakeThisOuTjohnsonj.....TakeThisOuTghostwheel.bga.com
OOOO SSSS    /2222  2222    11 |                 |
O  O S      /    2     2     1 |"We need breath- |"Bite me." Tom Servo
O  O SSSS  /  2222  2222     1 |-ing room!"      |
O  O    S /   2     2    ..  1 |     Bill Gates  |"I want to decide who lives
OOOO SSSS/    2222  2222 .. 111|                 |and who dies" Crow T. Robot
-----------------------------------------------------------------------------

'PIC FAQ '
1994\06\04@094718 by Tom

Hi Folks,
       As threatened by Jory, here is the first draft of the brand
new PIC FAQ for your perusal.  Please give it a glance and help me
to fill in some of the gaps.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
This article is a collection of information sources for the PIC
family of microcontrollers (and variants).

The following topics are addressed:

           0   )  Index

           1   )  ABOUT THIS FAQ
           1.1)  Who put this FAQ together?
           1.2)  How can I contribute to this FAQ?
           1.3)  What newsgroups will this FAQ be posted to?
           1.4)  Can I distribute this FAQ or post it somewhere else?

           2   )  ABOUT THE PIC
           2.1)  The PIC microcontroller
           2.2)  PIC representatives and approximate prices

           3   )  PIC Utilities
           3.1)  FTP sites for the PIC
           3.2)  BBSs that support the PIC
           3.3)  Programming languages (3rd Party)
           3.4)      -:-     hardware     -:-               -:-

           4   )     PIC DOCUMENTATION
           4.1)  Periodicals that cover the PIC
           4.2)  Books on the PIC
           4.3)  Miscellaneous documentation on the PIC

           5   )  What's next.



1)  ABOUT THIS FAQ

1.1)  Who put this FAQ together?

       The members of the PIC  NEWS LIST via TakeThisOuTpicKILLspamspamfigment.mit.edu
       i.e.  yourselves.

1.2)  How can I contribute to this list?

   Please, if you have any suggestions corrections or additions,
   notify me by E-MAIL.  :  .....TomRemoveMEtakdsign.demon.co.uk   Thank you.
       

1.3)  What newsgroups will this FAQ be posted to?

   This FAQ will be posted to the following newsgroups:
         sci.electronics
         ???.?????     ----   suggestions  ?

   The schedule for posting will be once a month.


1.4)  Can I post this FAQ to my local BBS?

   I am putting no restrictions on the use of this FAQ except - It
must   be distributed in its entirety and no financial gain may be
realized  from it.


2)  ABOUT THE PIC

Comments & Descriptive prose .... anyone ?

2.1)  The PIC microcontroller

   The PIC series are eprom based 8-bit microcontrollers
       developed by Microchip Technology
               <List of Addresses to go here >

2.2)  PIC Variants

               List required here

3)  PIC SOFTWARE

   This section includes pointers to software for the PIC.
       FTP sites and BBSs


3.1)  FTP sites for the PIC

       FTP  SITE               Directory

       ftp.sics.se     /pub/mchipsoft/

The files here are publicly available from the Microchip BBS via
Compuserve. Since many people interested in these files have an
internet connection, the files have also graciously been made
available at SICS by Anders Nobinder of Memec Scandinavia, Microchip's
Swedish agent.

       ftp.funet.fi (nic.funet.fi)


3.2)  BBSs that support the PIC

       Microchip BBS
               Contact by dialing the same number you would use to get to
       Compuserve at 19200,n,8,1, except that you press +<CR> at the
(garbage)
       prompt, followed by MCHIPBBS as the host (instead of CIS).


       Don Lekei BBS
                (Canada) (604) 597-3479


3.3)  PIC programming languages (3rd Party)

Host m/c                PC

Prog. Name      ASPIC   Shareware `C' assembler  (reg = $100 CDN ($69 US))
               **DESIGNED** for embedded controller design
               the shareware license has an unusual clause absolving
               those who only use it for non-commercial purposes

Supplier/Author Don Lekei  < RemoveME72677.2623spamBeGonecompuserve.com >
               BBS at (Canada) (604) 597-3479
               - One assembler for 16c5X, 16c7X, 16c8X, 17c42
               - Compatable with PICSIM (MPSIM)
               - Compatable with MAKE, and with auto-error tracking editors
               - Many times faster than PICALC (MPALC)
               - Standard base notation (Intel & Motorola format)
               - CODE and FUNCTION macros
               - Auto register bank management
               - Text/data translation
               - Automatically generates RETLW tables for text and data tables
               - Built-in version management and assembly control functions
               - user command-line switches
               - many other features
               -character set translation (eg. for LED, LCD, On Screen Displays)
               - bit labels, environment labels, etc.




-------------------------------------------------------------------------------------

Host m/c                Macintosh

Prog. Name      uASM

Supplier                Micro Dialects Inc,
               PO Box 190,
               Loveland, OH 45140,
               Ph: 513/271-9100.

Features:               An integrated text editor, assembler
               and communications modules. fully supports macros,
               automatic labels, local labels, conditionally assembly,
               includes to 10 level deep.
               The editor supports up to 10 open files at a time, full
               search and replace including grep searches,
               file size limited only by RAM available.  
               The emulator supports data transfer up to 38,400 baud.

NOTE:           The uASM code is incompatible with the MicroChip Simulator
               <unless you know better ? >


-------------------------------------------------------------------------------------

Host m/c                PC ?

               C5x compiler C5x series
               C71 compiler

Supplier                CCS
               PO Box 11191
               Milwaukee, WI  53211
               phone # : 414-781-2794  ext.30
               (you leave your message on an answering machine)

Features                -libraries for RS232 serial I/O and precision delays
               -allow call trees deeper than the hardware stack


-------------------------------------------------------------------------------------

3.4)  PIC Programming Hardware (3rd Party)

Product         programmer
Model           Microburner 512
Supplier                Beradine Products Ltd,
               PO Box 86757,
               North Vancouver,
               BC CANADA V7L4L3,
               Ph: 604/988-9853.

Contact         Gary Anderson

Features                RS-232 terminal serial port compatible programmer
               Supports communications up to 38,400 baud,
               stand-alone or host operation,


4)  PIC DOCUMENTATION


4.1) Periodicals that may cover the PIC.

   The Computer Applications Journal (Circuit Cellar Ink)
       - programming and construction articles
       - POB 7694, Riverton, NJ  08077-8784
       - FAX: (203)872-2204
       - Voice orders: (609) 786-0409
       - On-line orders (BBS): (203) 871-1988
       - Email orders: spamBeGoneken.davidson@spam@spam_OUTcircellar.com
       - $21.95, $31.95 surface Canada and Mexico,
         $49.95 air all other countries

   Computer Design
        industry announcements and trends
       One Technology Park Drive,
       P.O. Box 990, Westford, MA  01886
        (508)692-0700

   The Computer Journal
       - programming and construction articles
       - PO Box 535, Lincoln  96648

   Dr. Dobbs Journal
       - programming articles, concepts and designs
       - 411 Borel Ave., San Mateo, CA  94402
       - (415)358-9500

   Electronic Engineering Times
       - industry announcements and trends
       - 500-B Bi-County Boulevard, Farmingdale, NY  11735
       - (516)293-3000

   Electronics Now
       - construction articles
       - Box 55115, Boulder, CO  80321-5115
       - $19.97 one year

   Elektor Electronics
       - programming and construction articles
       - World Wide Subscription Service Ltd
         Unit 4, Gibbs Reed Farm, Pashley Road
         Ticehurst TN5 7HE, England
       - 27 UK pounds
    or
       - Old Colony Sound Lab,
       - P.O. Box 243, Peterborough, NH 03458
       - Tel. (603) 924-6371, 924-6526
       - Fax: (603) 924-9467
       - $57 USA and Canada per year

   Embedded Systems Programming
       - programming and systems design articles
       - Miller Freeman Publications
       - 500 Howard St., San Francisco, CA  94105
       - (415) 397-1881

   Microcomputer Journal (formerly Computer Craft)
       - programming and constructions articles
       - 76 N. Broadway, Hicksville, NY  11801
       - $18.95 one year, foreign $23.00, foreign air mail $76.00

   Midnight Engineering
       - 1700 Washington Ave., Rocky Road, CO  81067
       - (719)254-4553


4.2)  Books on the PIC

   I don't have much information on this, only that one exists.  I
   would greatly appreciate it if someone could provide a short
   synopsis and the complete book name, as my copy has not
   been delivered yet.    [it's in the post, honest !]

4.3)  Miscellaneous documentation on the PIC

   MicroChip Technology Incorporated
       - application notes



5)  What's next.

   I'm working on it...... Suggestions welcome.


   I would like to thank the following individuals who have
contributed to this accumulation.

       Jory Bell      
       Don Lekei
NOTE: .......If your name should be here, apologies. some of the
above has been dredged from Jory's archives in such a fashion as to
make it less than convenient to work out with whom it originated.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Copyright (c) 1994 by T.A.Kellett, all rights reserved.
_______________________________________________________
Tom Kellett    < TakeThisOuTTomspamtakdsign.demon.co.uk >

1994\06\04@210035 by eric

'RTCC and SLEEP'
1994\06\08@152313 by jlawson

Possible newbie question.

Does the PIC16CXX RTCC (f1) continue to increment from the internal
instruction cycle clock during a SLEEP instruction?
According to the simulator it does, but the data sheet indicates
otherwise.
Thanks.
/////////////////////////////////////////////////////
Jamie Lawson         \ jlawsonEraseMEevbhort.uoguelph.ca \
University of Guelph \ Voice (519) 824-4120 x2616  \
Guelph, Ontario      \ FAX   (519) 767-0755        \
Canada               \                             \
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

1994\06\09@064402 by eric

On Wed, 8 Jun 1994 15:19:26 EDT, "Jamie Lawson" <RemoveMEJLAWSONEraseMEspam_OUTevbhort.uoguelph.ca> wrote:

> Does the PIC16CXX RTCC (f1) continue to increment from the internal
> instruction cycle clock during a SLEEP instruction?

No, the oscillator stops.  Sounds like a bug in the simulator.

Note that on the 16C64 and 16C74, you can hook up a crystal to timer 1 if
you need an accurate timer during sleep.

Eric

1994\06\09@180613 by tom

'FAQ - Volunteers requ.'
1994\06\09@181306 by tom

'PIC and Sleep'
1994\06\10@000242 by -Kellogg High School

'PIC Code Library'
1994\06\10@203406 by tom

I'm setting up a code library for the PICs.

The way it will work is:

PIC users (YOU) send routines in by e-mail. I classify and index
them.
If a user wants a routine to do X, they send e-mail specifying X and
the mailler here does the obvious.

If the said user improves the routine, or performs the function in a
different fashion, they improve the library by sending their version.
etc. etc.  I assume you get the picture. <g>

So, what can _you_ offer ?
~~~~~~~~~~~~~~~~~~~~~~~~
We need routines of every complexity from basic in/out and timing
etc.
for brand new users upto whatever you can legally part with. :-)

SO, dig out the early stuff you did when you were first play^H^H^H^H
experimenting with the PICS and e-mail it ;-

TO:             @spam@PicsRemoveMEEraseMEtakdsign.demon.co.uk
Subject:        Pic-code

As an extension to this it would be nice to offer complete packages.
i.e. circuit diag. + board layout ready to produce a board to
go with the software.

So, if you include a circuit diag, I'll lay out the boards and we'll
find an ftp site to hold them.
--
Cheers
                                     Tom

'neat PIC stuff from Dave Dunfield '
1994\06\13@220452 by eric

The following is an excerpt from a recent message posted to the DS-750 mailing
list by Dave Dunfield (of Micro-C fame).  I haven't tried it, but is sounds
pretty neat.

Eric
-----------------------------------------------------------------------------
>From: alfred!tous!stardust!tous!alfred!ucf-cs!BIX.com!EraseMEddunfield@spam@osceola.cs.ucf.edu
Date: Wed, 01 Jun 1994 09:44:08 -0400 (EDT)
Subject: Development Tools
To: @spam@ds-750spam_OUT.....stardust.oau.org
Content-Transfer-Encoding: 7BIT
X-Cosy-To: spamBeGoneds-750EraseMEstardust.oau.org

...

I have (in a joint venture with another company) just released a new
product which might be of interest. It is called the P57-MUSTANG, and
consists of a PIC 16C57 pre-programmed with a virtual machine
interpreter, and an 8K (byte) serial EEPROM. A socket for a second
8K EEPROM is provided, and EEPROM can be expanded to a total of 64K
by adding chips to the prototyping area. The serial EEPROM can be
used for both CODE and DATA storage, allowing you to permanently record
configuration etc. from within your program.

The board is 3" by 2" and includes a 1" by 2" prototyping area. The
development kit which includes: 1 board, C compiler, Assembler, Library
(with source code), In-circuit Simulator/Emulator (supporting C source
level debugging), and LOTS of other utilities is priced at $150 US

Individual boards are priced at: $59 US

The U.S. Distributor is:

   P&E Microcomputer Systems Inc.
       P.O. Box 2044
   Woburn, MA  01888
   Tel: (617) 353-9206
   Fax: (613) 353-9205

...

Dave Dunfield  (ddunfieldspamBeGonebix.com)
Dunfield Development Systems

'Errors from MPALC'
1994\06\15@044850 by rca

Hello all,

I've just tried to compile a very small program for use with the PIC16C84
using MPALC v4.14:

The program listing is:

{Quote hidden}

>; Sets RA<0:3> as inputs and RB<0:7> as outputs
>; whatever appears on RA<0:3> is copied to RB<0:3>
>;
>        include         "pic84reg.equ"
>
>main    movlw   1FH             ; set up port A as all inputs
>        movwf   TRISA
>        movlw   0h              ; set up port B as all outputs
>        movwf   TRISB
>        
>loop    movf    PORT_A,w        ; get data from port A
>        movwf   PORT_B          ; copy data to port B
>
>        goto loop               ; repeat
>
>start   org     0h
>        clrw
>        goto    main
>
>END
>
>The include file reads:
>
> LIST E=1, F=INHX16, P=16C84, R=HEX
> PORT_A  equ     05h     ; I/O Port A
> PORT_B  equ     06h     ; I/O Port B
> TRISA   equ     85h     ; Port A data direction
> TRISB   equ     86h     ; Port B data direction

However I got two errors which I don't really understand:

0127   movwf   TRISA
Warning: [Warning 1] : line 127 : Filereg masked to appropriate number of bits

0129   movwf   TRISB
Warning: [Warning 2] : line 129 : Filereg masked to appropriate number of bits

Can anybody explain this to me? Seeing as this is my first ever program I'm
sure it's me being a bit stupid.

Thanks in advance,

Rafe

----------------------------------------------------------------
Rafe Aldridge - RemoveMErca@spam@spamBeGonesirius.tn.rl.ac.uk
R65, Rutherford Appleton Lab,                      wwWWww
Chilton, Oxon, OX11 OQX, UK.                        o  o
------------------------------------------------ooO--(__)--Ooo--

'The unused 40pin socket on the PIC Start programme'
1994\06\15@072115 by IDH

'The unused 40 pin pickstart socket.'
1994\06\15@073342 by IDH

1994\06\15@074540 by byron

1994\06\15@080137 by rca

> .....byron@spam@EraseMEcc.gatech.edu (Byron A Jeff)
>
>>BTW can someone make the MPSTART.EXE software (V3.04) available to me?
>
>You can ftp it from ftp.sics.se in the pub/mchipsoft/picstrt16 directory or
similar.
>
>Hope that helps.
>
>Rafe
>

----------------------------------------------------------------
Rafe Aldridge - .....rcaRemoveMEsirius.tn.rl.ac.uk
R65, Rutherford Appleton Lab,                      wwWWww
Chilton, Oxon, OX11 OQX, UK.                        o  o
------------------------------------------------ooO--(__)--Ooo--

1994\06\15@091502 by IDH

'Can Macintosh people play?'
1994\06\15@092747 by Mike Harpe

I have to admit that I am getting very curious about the PIC series of
chips.  I am becoming increasingly frustrated by the availability problems
that daunt Motorola products.  The idea of being able to order chips from
Digi-Key really sounds nice....

Sorry if this is an FAQ, but what's available to support us Mac users
who want to use the PIC?  What else do I need to get started?

Mike Harpe
University of Louisville
--
Michael Harpe, Communications Analyst III          Information Technology
Internet: .....mikeSTOPspam@spam@hermes.louisville.edu               University of Louisville
(502) 852-5542 (Voice) (502) 852-1400 (FAX)        Louisville, Ky. 40292
"He's not a man, he's a remorseless eating machine!" - The Simpsons

'40 pin picstart socket.'
1994\06\15@100910 by IDH

'PIC FAQ'
1994\06\15@152744 by Mike Harpe

Thanks, Jory!  I should have thought of Micro Dialects.  I have their 68HC11
assembler.  I think I may give MicroChip a call.

Mike

BTW. Your 'F1's are getting used, I am just looking for a more available CPU
for a project I am working on for possible publication in QST.  
--
Michael Harpe, Communications Analyst III          Information Technology
Internet: mikeEraseME@spam@hermes.louisville.edu               University of Louisville
(502) 852-5542 (Voice) (502) 852-1400 (FAX)        Louisville, Ky. 40292
"He's not a man, he's a remorseless eating machine!" - The Simpsons

'The unused 40 pin pickstart socket. '
1994\06\15@175723 by eric

'Errors from MPALC '
1994\06\15@180356 by eric

'Parallax 16C64 Adapter pinout..'
1994\06\16@190829 by johnsonj

I just bought a Parallax programmer(its much better then my old microchip
one).  Anyway i really dont have money to buy the adapter(yes i know is
only $50).  I have a couple enginnering samples of the 64 and would like
to program them.  Does anyone have this adapter and would you give me the
pinouts on it.  That is what pin on the header goes to which pin on the
16c64.  
later
       John

_____________________________________________________________________________
John Johnson                   |If it's not OS/2.|RemoveMEjohnsonjspamBeGoneccwf.cc.utexas.edu
                              |It's crap!       |spamBeGonejohnsonjKILLspam@spam@ghostwheel.bga.com
OOOO SSSS    /2222  2222    11 |                 |
O  O S      /    2     2     1 |"We need breath- |"Bite me." Tom Servo
O  O SSSS  /  2222  2222     1 |-ing room!"      |
O  O    S /   2     2    ..  1 |     Bill Gates  |"I want to decide who lives
OOOO SSSS/    2222  2222 .. 111|                 |and who dies" Crow T. Robot
-----------------------------------------------------------------------------

'16C71 programmer'
1994\06\17@031715 by rca

Hello all,

I've built David Taits programmer for use with an 16C84. However, I'd also
like to use the 16C71 at some stage due to the ad convertor.

Seeing as the 16C71 is also serially programmable, could I use Davids
programmer for this as well? Assuming of course that the device has been
erased properly.

Thanks for any info.

Rafe


----------------------------------------------------------------
Rafe Aldridge - rcaspam_OUT@spam@sirius.tn.rl.ac.uk
R65, Rutherford Appleton Lab,                      wwWWww
Chilton, Oxon, OX11 OQX, UK.                        o  o
------------------------------------------------ooO--(__)--Ooo--

'PIC-FAQ'
1994\06\17@110204 by tom

PIC-FAQ         Issue 2.0a              Last updated: 17/06/94 12:07:20

This article is a collection of information sources for the PIC
family of microcontrollers (and variants). Formatted at 79 chrs wide


1234567890123456789012345678901234567890123456789012345678901234567890123456789

The following topics are addressed:

           0  )  Index <You're reading it>

           1  )  ABOUT THIS FAQ
           1.1)  Who put this FAQ together?
           1.2)  How can I contribute to this FAQ?
           1.3)  What newsgroups will this FAQ be posted to?
           1.4)  Mailing lists of interest to PIC fettlers
           1.5)  Other FAQs of possible interest
           1.6)  Can I distribute this FAQ or post it somewhere else?

           2  )  ABOUT THE PIC
           2.1)  The PIC microcontroller
           2.2)  PIC variants
           2.3)  Notes for programmers
           2.4)  PIC contacts and representatives

           3  )  PIC Utilities
           3.1)  FTP sites for the PIC
           3.2)  BBSs that support the PIC
           3.3)  Programming languages (3rd Party)
           3.4)  Programming hardware  (3rd Party)

           4  )  PIC DOCUMENTATION
           4.1)  Periodicals that cover the PIC
           4.2)  Books on the PIC
           4.3)  Miscellaneous documentation on the PIC

           5  )  What's next.



=============================================================================

1)  ABOUT THIS FAQ

1.1)  Who put this FAQ together?

       The members of the PIC  NEWS LIST via spamBeGonepic@spam@figment.mit.edu
       i.e.  yourselves.

1.2)  How can I contribute to this list?

   Please, if you have any suggestions corrections or additions,
   notify me by E-MAIL.  :  RemoveMETomEraseMEKILLspamtakdsign.demon.co.uk   Thank you.
       

1.3)  What newsgroups will this FAQ be posted to?

   This FAQ will be posted to the following newsgroups:
       sci.electronics                 Y
       comp.robotics                   Y
       comp.realtime                   Y
       comp.answers                    Y When it's compliant
       alt.comp.hardware.homebuilt     ?

       ???.?????   suggestions         ?

   The schedule for posting will be once a month.


1.4)  Mailing lists of interest


       The pic list address is:         spamBeGonepicspam_OUTRemoveMEfigment.mit.edu
       Administrative matters go to:    .....pic-requestRemoveMEfigment.mit.edu



1.5)  Other FAQs of possible interest
       The 8051FAQ posted by Russ Hersch - sibit@spam@datasrv.co.il

       Available in

       comp.sys.intel
       comp.realtime
       comp.robotics
       comp.lang.forth
       sci.electronics


1.6)  Can I post this FAQ to my local BBS?

   I am putting no restrictions on the use of this FAQ except - It
must   be distributed in its entirety and no financial gain may be
realized  from it.


=============================================================================

2)  ABOUT THE PIC                                       13/06/94 01:34:51


-----------------------------------------------------------------------------

2.1)  The PIC microcontroller

   The PIC series are eprom based 8-bit microcontrollers
       developed by Microchip Technology


-----------------------------------------------------------------------------

2.2)  PIC Variants

PIC processors are available in three families, which Microchip refers to
as
the PIC16C5x, PIC16Cxx, and PIC17Cxx families.

PIC16C5x: 12 bit program word size, 33 instructions, 2 level stack,
         no interrupts

           Program    Data              Max.   Voltage   Typical   Digikey
           memory     memory     I/O    freq.  Range     Current   Price  
           (words)    (bytes)    pins   (MHz)  (Volts)   (mA)      (US $)
----------  ---------  ---------  -----  -----  --------  -------   -------
PIC16C54     512       25         12     20     2.5-6.25    2        4.39
PIC16C54A    512       25         12     20     2.5-6.25    2        
PIC16CR54    512 ROM   25         12     20     2.0-6.25    1        
PIC16CR54A   512 ROM   25         12     20     2.0-6.25    1        
PIC16C55     512       24         20     20     2.5-6.25    2        5.44
PIC16C56    1024       25         12     20     2.5-6.25    2        5.03
PIC16C57    2048       72         20     20     2.5-6.25    2        6.24
PIC16CR57A  2048 ROM   72         20     20     2.0-6.25    1        
PIC16C58A   2048       73         12     20     2.5-6.25    1        


PIC16Cxx: 14 bit word size, 35 instructions, 8 level stack

           Program    Data              Max.   Voltage   Typical   Digikey
           memory     memory     I/O    freq.  Range     Current   Price  
           (words)    (bytes)    pins   (MHz)  (Volts)   (mA)    (US $)
----------  ---------  ---------  -----  -----  --------  -------   -------
PIC16C64    2048       128        33     20     2.0-6.0     3       11.05
PIC16C71    1024       36         13     16     3.0-6.0     2       14.38
PIC16C74    4096       192                                          
PIC16C84    1024 EE    36 + 64 EE 13     10     2.0-6.0     2       10.15


PIC17Cxx: 16 bit word size, 55 instructions, 16 level stack:

           Program    Data              Max.   Voltage   Typical   Digikey
           memory     memory     I/O    freq.  Range     Current   Price  
           (words)    (bytes)    pins   (MHz)  (Volts)   (mA)    (US $)
----------  ---------  ---------  -----  -----  --------  -------   -------
PIC17C42    2048       256        33     25     4.5-5.5     6       15,15
PIC17C44    8192       480        33     25                        


Notes:

1.  Program memory is EPROM unless otherwise noted.
2.  Data memory is number of usable bytes, not including special function
   registers.
3.  Digikey prices are quantity 10 prices for 4 MHz DIP packaged OTP parts
   with RC oscillator option (where applicable), except that the 16C84
   uses EEPROM program memory,the slowest speed 17C42 is rated at 16MHz
   Prices are from Digikey catalog number 943 for May/June 1994.
   Other distributors often have lower prices, but typically also have
   high minimum order requirements.  Digikey also usually has plenty of
   parts in stock.  Windowed EPROM parts cost substantially more.


-----------------------------------------------------------------------------




2.3)
Notes for programmers:

All PIC instructions are a single word.  The equivalent of the immediate
address mode of other processors is the literal mode, used by instructions
ending in "LW", such as MOVLW, ADDLW, SUBLW, ANDLW, IORLW, XORLW, and
RETLW.The byte of data used by these instructions is directly encoded in
the instruction itself.

All PIC instructions take a single instruction cycle (four oscillator
cycles) to execute, unless a conditional test is TRUE or the program
counter is changed as a result of an instruction, in this case the
execution takes two instruction cycles.  

For example:

       movlw   37
       goto    next
next:   movwf   porta

The goto instruction takes two cycles (1 to get the value of label "next"
and 1 to load that value into the program counter) This is useful as a
two-cycle NOP, and is often written as "goto .+1" to avoid the need for a
label.

The W register is equivalent to the accumulator on other processors.
Almost all data movement, arithmetic, and logic operations use W.

Instructions that operate on W and a register (i.e., instructions ending
in "WF", like ADDWF and MOVWF) allow the result to be placed in either W or
the register (but not both).  This is specified by a ",W" or ",F" after the
operand.  The default is ",F", which will place the result in the
register. This can cause a lot of confusion if you're not careful, so I
recommend always specifying the destination explicitly.  An example of a
confusing instruction:

       incf    foo,w   ; w := foo+1  note that foo is unchanged!

If you want the result in both W and the register, you can use either:

       incf    foo,w
       mowwf   foo

or:

       incf    foo,f
       movf    foo,w

The stack is not accessible to the programmer in any way other than the
call and return instructions.  There is no way to push or pull data, or
even to examine the stack pointer.  On the 16C5x family the stack has only
two levels, so it is frequently necessary to write code in a different
style than would be used on a typical processor; you can only call
subroutines from your main code, or from a subroutine called from main, but
no deeper. If you try to make a 3rd CALL, the 2nd return address is
over-written so that the return from the 3rd CALL is OK but the return from
the 2nd CALL ends up where the 1st CALL should return to.

The 16CXX parts which implement an 8 level stack do so in a circular
fashion, so that the 9th CALL over-writes the return address for the 1st
CALL.

The 16C5x family doesn't have a normal return instruction; instead it has
RETLW, which stands for RETurn Literal Word.  RETLW loads an eight bit
constant into W (just as a MOVLW instruction would), then returns from the
subroutine.  This can be useful, but is agravating if you want to return a
computed value.  On the newer PIC families there is a normal RETURN
instruction.

With the exception of the 17Cxx family, there is no way for software to
read an arbitrary location of program memory.  In order to implement lookup
tables, it is necessary to combine the use of the ADDWF and RETLW
instructions.  For example, the following code implements a lookup table of
the first four odd prime numbers:

primes: addwf   pcl
       retlw   3
       retlw   5
       retlw   7
       retlw   11

To use the table, load the appropriate index (in this case, 0 to 3) into
W, and "call primes".  The addwf instruction adds the contents of W to the
PC, which has already been incremented to point to the "retlw 3".  The
table will return with the value in W.  The total time taken is 6
instruction cycles, or 24 oscillator cycles.

Note that while on most processors the use of an out-of-range index will
result in the use of incorrect data, but the program execution will
continue normally, on the PIC a bad index value will cause the execution of
arbitrary instructions!

i.e. the computed address must be in the top 1/2 of page.

Normally the index would range from 0 to the size of the table minus one,
but it is possible to use other ranges by putting the retlw instructions
somewhere other than immediately following the "addwf pcl".  It is also
possible to implement tables using a "subwf pcl", or perhaps other
instructions with pcl as the destination.

The subtract instructions (SUBWF and SUBLW) work differently than most
people expect.  SUBWF subracts W *from* the contents of the register, and
SUBLW subtracts W *from* the literal.  (SUBLW is not available on the 16C5x
family.)

If you want to subtract a literal from W, it is easiest to use the ADDLW
instruction with the two's complement of the literal.  For example:

       addlw   0feh    ; w := w - 2

Some assemblers allow this to be written as:

       addlw   -2

There is no instruction to take the two's complement of W (like the NEG
instruction on Motorola processors), but because of the way the subract
instructions work you can use:

       sublw   0

On the 16C5x family, the CALL instruction can only address the first 256
words of a bank of program memory.  It is common practice to use "call
extenders", which are simply GOTO instructions in the first 256 words with
a target in the last 256 words.

On the 16C57 and 16C58, if you plan to use indirect addressing (via the FSR
and IND registers), it is vitally important that your reset code clear FSR
before using any other RAM locations.  Otherwise you may start up in an
arbitrary bank, and as soon as you change FSR all your carefully set up
variables will effectively disappear.


-----------------------------------------------------------------------------
2.4)  PIC contacts and representatives          12/06/94 12:12:51

I don't know where these are for sure.

       Advanced Trans Data                             tel:(214) 980- 2960
       Programmer      PGM16 & PGM 16x8 Gang Prog.     fax:(214) 980-2937      
       No further information is available at this time

       Micro Engineering Labs                          tel:(719) 520-5323
       makes PIC-Proto boards

       Myriad Development                              tel:(303) 692-3836
       CCS - C compiler
       tel: (414) 781-2794 extension 30

       Digi-Key                                        tel:1-800-344-4539
       Order electronic parts, carry 16C54,55,56,57,&71.

       ED Teck. Pubs                                   tel:407-454-9905
       Fred Eady                                       BBS:407-454-3198
       Writes articles for popular magazines.
       Has a PIC programmer kit for $70.
       BBS good source of information, very helpful.

       FAI                                             tel:1-800-303-5701
       Ask for Chris
       Electronics distributer, carry PIC's,

       Needham Electronics                             tel:(916) 924-8037
        I don't know if they make PIC stuff,           fax:(916) 972-9960
       but they make an EPROM programmer, the PB-10    bbs:(916) 972-8042

       Their emp-20 is great for Pics,Pals,Gala,EEproms etc but is ~$500
       It can be set to auto program on start up. It takes about 4 seconds
       for a bat file to reassemble the source with new EQU's from the
       command line, recompile and program a part.

       Protel                                          tel:1-800-544-4186
       Builder of EASYTRAX, which is free-ware and a bunch of new stuff.
       Call Ext 225 ask for Louise Markham.            bbs:1-408-243-0125


       Bell Industries                                 tel:1-800-525-6666
       Electronic Distributor, including PIC's
.........................................................................

Australia
       Microchip Technology                    tel:61 03 890 0970

       Product information
       No further information is available at this time

.........................................................................

Canada
AP Circuits
       BBS 1-403-291-9342 (Canada)
       Can download EASYTRAX(V2.06), various utilities, GERBER file
       proofers, etc. You can upload PCB files and they will make
       boards and ship to you in about week. (about $100)

       Baradine Products Ltd                   tel:604-988-9853
       Programmer      Micro-Burner    
       No further information is available at this time

.........................................................................
Europe
       Data I/O Corp.                          tel:31(0)-6622866
       Programmer      Unisite with Site-48 module    
       No further information is available at this time

.........................................................................
France
       Arizona Microchip Technology SARL       tel:33 01 6930 9090
       2, Rue Du Buisson aux Fraises           fax:33 01 6930 9079
       F-91300 Massy, France
       Product information    

.........................................................................
Germany
       Arizona Microchip Technology GMBH       tel:49 089 609 6072
       Alte Landstrasse 12-14                  fax:49 089 609 1997
       D-8012 Ottobrunn, Germany
       Product information    

       SMS                                     tel:49-7522-4460
       Programmer      Sprint Expert  
       No further information is available at this time

.........................................................................
Hong Kong
       Microchip Technology Inc.               tel:852 410 2716
       Unit No. 2520-2525                      fax: 852 418 1600
       Tower 1, Metroplaza
       Hing Fong Road, Kwai Fong
       N.T., Hong Kong
       Product information

.........................................................................
Italy
       Microchip Technology                    tel:39 039 689 9939
       Product information
       No further information is available at this time

.........................................................................
Japan
       Data I/O Corp.                          tel:(03)  432- 6991
       Programmer      Unisite with Site-48 module    
       No further information is available at this time

       Microchip Technology International Inc. tel:81 45/471-6166
       Shinyokohama Gotoh Bldg. 8F, 3-22-4     fax: 81 45/471-6122

1994\06\17@110204 by tom

       Shinyokohama, Kohoku-Ku, Yokohama-Shi
       Kanagawa 222 Japan
       Product information            

.........................................................................
Korea
       Microchip Technology                    tel:82 2 518 8181
       Product information
       No further information is available at this time

.........................................................................
Singapore
       Microchip Technology                    tel:65 222 4962
       Product information
       No further information is available at this time

.........................................................................
Taiwan
       HI-LO                                   tel:(02) 7640215
       Programmer      ALL-03  
       No further information is available at this time

       Microchip Technology                    tel:886 2 760 2028
       Product information
       No further information is available at this time

.........................................................................
U.K.    
       Arizona Microchip Technology Ltd        tel:44 062-885-1077
       Unit 3, Meadow Bank, Furlong Rd         fax: 44 062-885-0178
       Bourne End, Bucks SL8 5AJ
       Product information            

       Application Solutions Ltd               tel:273-476608
       Programmer      PIC Programmer
       No further information is available at this time

       Citadel Products Ltd.                   tel:44-819-511-848
       Programmer      PC-82  
       No further information is available at this time

       Maple Technology Ltd                    tel:44-666-825-146
       Programmer      MQP-200
       No further information is available at this time

       Stag Microsystems                       tel:44-707-332-148
       Programmer      PP39    
       No further information is available at this time

.........................................................................
U.S.    
       ADVIN Systems Inc                       tel:408-984-8600
       Programmer      PILOT U40      
       No further information is available at this time

       BP Microsystems                         tel:800-225-2102
       Programmer      CP-1128                 tel:713-461-4958
       No further information is available at this time

       Data I/O Corp.                          tel:800-288-4965
       Programmer      Unisite with Site-48 module    
       No further information is available at this time

       Elan Digital Systems Ltd                tel:(408) 946-3864
       Programmer      EF-PER 5000 Series Gang Programmer      
       No further information is available at this time

       Link Computer Graphics                  tel:301-994-6669
       Programmer      CLK-3100        
       No further information is available at this time

       Logical Devices Inc                     tel:800-331-7766
       Programmer      ALLPRO 88               tel:305-974-0967
       No further information is available at this time

       Micro Engineering Labs                  tel:719-520-5323
       Box 7532 Colorado Springs, CO 80933
       Has proto-type boards and demo kits,
       Good source of info, can do manufacturing, etc

       Microchip Technology Inc.               tel:(602) 786-7200
       2355 West Chandler Blvd.                fax: (602) 899-9210
       Chandler, AZ 85224-6199
       Product information            

       Parallax Inc                            tel:916-721-6669
       6359 Auburn Blvd., Suite C              fax: (916) 624-8003
       Citrus Heights, CA 95621 USA            bbs: (916) 624-7101
       Assembler / Simulator                   Help 916-624-8333
       The assembler takes either the standard instructions
        or parallax's 8051-like pseudo instructions

       Parallax Inc                            tel:916-721-6669
       6359 Auburn Blvd., Suite C              fax: (916) 624-8003
       Citrus Heights, CA 95621 USA            bbs: (916) 624-7101
       Programmer      PIC 16C5X-PGM           Help 916-624-8333
       If you call the BBS you can order info by mail.



=============================================================================


3)  PIC Utilities                               13/06/94 02:24:19


       PICSTART-16B-1

Features
       Supports only 16C5x,16C71 and 16C84,(INHX16, INHX8S, INHX8M, PICICE)
       compatible with a wide range of file formats
       comes with chips to play with.
       has a zif socket
       assembler has powerful macro capabilities
       also includes a powerful debugger


       PICSTART-16C

Features
       To be announced


-------------------------------------------------------------------------------

       PARALLAX
       --------
Features
       Parallax's own instruction set  Their assembler takes either the
       standard instructions or parallax's 8051-like pseudo instructions.
       needs only a 360k floppy, MSDOS 2.1, 128K RAM, mono.
       simulator software


-----------------------------------------------------------------------------

3.1)  FTP sites for the PIC

       FTP  SITE               Directory

       ftp.sics.se     /pub/mchipsoft/

The files here are publicly available from the Microchip BBS via
Compuserve. Since many people interested in these files have an
internet connection, the files have also graciously been made
available at SICS by Anders Nobinder of Memec Scandinavia,
Microchip's Swedish agent.

       ftp.funet.fi (nic.funet.fi)      /pub/microprocs/PIC

       wpi.wpi.edu     /stamp
               basic stamp information PLUS PIC "C" compiler

       ftp.luth.se           /pub/misc/microchip

       ftp.oak.oakland.edu

       ftp.uni-erlangen.de,
       directory
       [ /mounts/epix/public/pub/Multimedia/VideoCrypt
       /microcontroller/microchip.bbs ]

       Markus Kuhn <EraseMEmskuhnRemoveMESTOPspamcip.informatik.uni-erlangen.de>


-----------------------------------------------------------------------------

3.2)  BBSs that support the PIC

       Microchip BBS
               Contact by dialing the same number you would use to get to
       Compuserve at 19200,n,8,1, except that you press +<CR> at the
       (garbage)
       prompt, followed by MCHIPBBS as the host (instead of CIS).


       Don Lekei BBS
                (Canada) (604) 597-3479


-----------------------------------------------------------------------------

3.3)  PIC programming languages (3rd Party)

Host m/c                PC

Prog. Name      ASPIC   Shareware PIC assembler  (reg = $100 CDN ($69 US))
               **DESIGNED** for embedded controller design
               the shareware license has an unusual clause absolving
               those who only use it for non-commercial purposes

Supplier/Author Don Lekei  < RemoveME72677.2623KILLspamTakeThisOuTcompuserve.com >
               BBS at (Canada) (604) 597-3479

Features        - One assembler for 16c5X, 16c6X, 16c7X, 16c8X, 17c42
               - Compatable with PICSIM (MPSIM)
               - Compatable with MAKE, and with auto-error tracking editors
               - Many times faster than PICALC (MPALC)
               - Standard base notation (Intel & Motorola format)
               - CODE and FUNCTION macros
               - Auto register bank management
               - Text/data translation
               - Automatically generates RETLW tables for text / data tables
               - Built-in version management and assembly control functions
               - user command-line switches
               - many other features
               -character set translation (eg. for LED,LCD,On Screen Displays)
               - bit labels, environment labels, etc.


-------------------------------------------------------------------------------

Host m/c        PC i386 /MSDOS/SunOS 4.1.1/NeXTSTEP 3.0.

Prog Name       B.LO.C release 1.0, version 4.0
               Available for the PIC16CXX and PIC17CXX
Supplier        Butterfly Signal Processing Inc.
               131 Bloor Street West #200-154
               Toronto, Ontario, Canada M5S 1R8
               Tel: (416) 929-5754
               Fax: (416) 929-5744
Features        `C-like' syntax
               Locally optimal code generation
               Superfast, one-pass compilation
               Zero stack and memory space used
               Produces fully annotated, easy-to-read -
                  - assembly code to facilitate simulation
               Regular and in-line functions supported
               B.LO.C and assembly routines can be mixed
               In-line assembly code inclusion
               For more information contact
               spamBeGoneasm@spam@kalam.butterfly.com


-------------------------------------------------------------------------------

Host m/c                Macintosh

Prog. Name      uASM

Supplier                Micro Dialects Inc,
               PO Box 190,
               Loveland, OH 45140,
               Ph: 513/271-9100.

Features:               An integrated text editor, assembler
               and communications modules. fully supports macros,
               automatic labels, local labels, conditionally assembly,
               includes to 10 level deep.
               The editor supports up to 10 open files at a time, full
               search and replace including grep searches,
               file size limited only by RAM available.  
               The emulator supports data transfer up to 38,400 baud.

NOTE:           The uASM code is incompatible with the MicroChip Simulator
               <unless you know better ? >



-------------------------------------------------------------------------------

Host m/c                PC ?

               C5x compiler C5x series
               C71 compiler

Supplier                CCS
               PO Box 11191
               Milwaukee, WI  53211
               phone # : 414-781-2794  ext.30
               (you leave your message on an answering machine)

Features                -libraries for RS232 serial I/O and precision delays
               -allow call trees deeper than the hardware stack




-----------------------------------------------------------------------------

3.4)  PIC Programming Hardware (3rd Party)

Product         programmer
Model           Microburner 512
Supplier                Beradine Products Ltd,
               PO Box 86757,
               North Vancouver,
               BC CANADA V7L4L3,
               Ph: 604/988-9853.

Contact         Gary Anderson

Features                RS-232 terminal serial port compatible programmer
               Supports communications up to 38,400 baud,
               stand-alone or host operation,


PIC16C84 Programmer using PC parallel port.
               Schematic, C and QBasic
               source available from:

       Microchip BBS:
               In 3rdparty library as PIC84PGM.ZIP
       ftp://bode.ee.ualberta.ca
               /pub/cookbook/comp/ibm/pic84pgm.zip
       ftp://ftp.luth.se
               /pub/misc/microchip/16c84/pic84pgm.zip

       Contact: RemoveMEdavid.taitspam_OUTman.ac.uk Author/Designer


=============================================================================


4)  PIC DOCUMENTATION           12/06/94 12:11:56


4.1) Periodicals that may cover the PIC.

   The Computer Applications Journal (Circuit Cellar Ink)
       - programming and construction articles
       - POB 7694, Riverton, NJ  08077-8784
       - FAX: (203)872-2204
       - Voice orders: (609) 786-0409
       - On-line orders (BBS): (203) 871-1988
       - Email orders: ken.davidsonspamcircellar.com
       - $21.95, $31.95 surface Canada and Mexico,
         $49.95 air all other countries

   Computer Design
        industry announcements and trends
       One Technology Park Drive,
       P.O. Box 990, Westford, MA  01886
        (508)692-0700

   The Computer Journal
       - programming and construction articles
       - PO Box 535, Lincoln  96648

   Dr. Dobbs Journal
       - programming articles, concepts and designs
       - 411 Borel Ave., San Mateo, CA  94402
       - (415)358-9500

   Electronic Engineering Times
       - industry announcements and trends
       - 500-B Bi-County Boulevard, Farmingdale, NY  11735
       - (516)293-3000

   Electronics Now
       - construction articles
       - Box 55115, Boulder, CO  80321-5115
       - $19.97 one year

   Elektor Electronics
       - programming and construction articles
       - World Wide Subscription Service Ltd
         Unit 4, Gibbs Reed Farm, Pashley Road
         Ticehurst TN5 7HE, England
       - 27 UK pounds
    or
       - Old Colony Sound Lab,
       - P.O. Box 243, Peterborough, NH 03458
       - Tel. (603) 924-6371, 924-6526
       - Fax: (603) 924-9467
       - $57 USA and Canada per year

   Embedded Systems Programming
       - programming and systems design articles
       - Miller Freeman Publications
       - 500 Howard St., San Francisco, CA  94105
       - (415) 397-1881

   Microcomputer Journal (formerly Computer Craft)
       - programming and constructions articles
       - 76 N. Broadway, Hicksville, NY  11801
       - $18.95 one year, foreign $23.00, foreign air mail $76.00

   Midnight Engineering
       - 1700 Washington Ave., Rocky Road, CO  81067
       - (719)254-4553


=============================================================================

4.2)  Books on the PIC

       A Beginners Guide to the Microchip PIC     Nigel Gardner
       ISBN: 1 899013 00 8     Printed in the UK by Character Press Ltd.
       Software (on floppy) and hardware guide.  Debugging techniques...
       Available from Polar Electronics in UK  19.95 UK Pounds



=============================================================================

4.3)  Miscellaneous documentation on the PIC

MicroChip Technology Incorporated
- application notes



ED Teck. Pubs
Fred Eady
407-454-9905
BBS 407-454-3198
Writes articles for popular magazines.  Has a PIC programmer kit for $70.
BBS available, good source of information, very helpful.

Parallax
Stamps and programmer, etc.
BBS 916-624-7101
Help 916-624-8333

AP Circuits
BBS 1-403-291-9342 (Canada)
Can download EASYTRAX(V2.06), various utilities, GERBER file proofers, etc.


=============================================================================


5)  What's next.                                        13/06/94 02:02:12

   I'm working on it...... Suggestions welcome.


   I would like to thank the following individuals who have
contributed to this accumulation.

       Jory Bell                       <spam_OUTjoryspam_OUTspam_OUTmit.edu>
       Don Lekei                       <72677.2623spam_OUTcompuserve.com>
       Eric Smith                      <RemoveMEericKILLspam@spam@apache.telebit.com>
       Jeff Dague                      <jpdaguespamBeGone.....iastate.edu>
       Steven M. Davidson              <KILLspamdavidson.....its.bldrdoc.gov>
       Ian King                        <spam_OUTiekKILLspamarrc.salf.ac.uk>
       kalam ?                         <RemoveMEasmRemoveMEEraseMEkalam.butterfly.com>
       David B. Thomas                 <KILLspamdavidsonspamBeGoneits.bldrdoc.gov>
       Martin Vuille                   <martin.vuillespamsynapse.org>

NOTE: .......If your name should be here, apologies. some of the above has
been dredged from Jory's archives in such a fashion as to make it less than
convenient to work out with whom it originated.



______________________________________________________________________________
RemoveMEpicsspamBeGoneRemoveMEtakdsign.demon.co.uk                     Home of the PIC CODE LIBRARY
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Disclaimer: Inclusion of any code samples in this document does NOT imply
any approval or guarantee as to the suitability of said samples for any
purpose whatsoever other than as a self-training aid.  I.E. If it blows
your ICE, trashes your hard disc, wipes your backups, burns your building
down or just plain don't work, #### IT AIN'T MY FAULT #### In the event of
judicial ruling to the contrary, any liability shall be limited to the sum
charged on you by me for the aforementioned document OR nothing, whichever
is the lower.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       Copyright (c) 1994 by T.A.Kellett, all rights reserved.
_______________________________________________________________________________
Tom Kellett                                     < KILLspamTomspamBeGonetakdsign.demon.co.uk >
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

'PIC Development Software'
1994\06\17@123920 by trisys

TRISYS, Inc has placed two shareware packages 'idesw.zip' and 'mvsw.zip'
on ftp server ftp.sics.se in the /pub/mchipsoft directory area. (they
should be made available for download by the sysop in a day or so, after
he checks them out) Give them a try.. mail any comments to the
email server @spam@picSTOPspam@spam@figment.mit.edu, or directly to TRISYS, Inc at
trisysspamBeGonespamBeGoneramp.com

If you are not interesed in these environments.. Some windows
help files for the PIC processors have been uploaded there also.
If you are downloading the environments, do not download the help
files also because they are zipped with 'idesw.zip' and 'mvsw.zip'

idesw.zip - This is a shareware Windows 3.1 MDI compliant integrated
editor and assembler for the Microchip PIC family of parts.
It supports the PIC16C5X, PIC16C6X, PIC16C7X, PIC16C8X, and PIC17C42
processors.

mvsw.zip - this is a shareware Windows 3.1 MDI compliant editor,
assembler, and simulator for the Microchip PIC16C 54, 55, 56,57, & 58
processors. It provides the following capabilities.
* Integrated editor/assembler/error windows.
       - Editor provides Undo, Cut, Copy, Paste.
       - Supports multiple fonts & Windows printer driverrs.
       - All windows (error, listing, and memory) updated after
         assembly automatically.
       - Double click on error line takes you to the source
         code line with the error.
* Simulation
       - Quadrature based simulation. Single step by quadrature.
       - Allow modification of any file register or special
         function register at any quadrature, as well as the
         instruction pipeline, stack, prescaler etc.
* Timing/Stimulus
       - Set and display testpoints on processor pins.
       - Create stimuls for processor pins.
       - Does not support printing at this time.
       - Connect output from one pin to input of another.
       - Registered version supports simultaneous multiple processor
         simulation. Useful for testing/simulating communication between
         processors.
       - Registered version supports connection of one processorr pin
         to another processor pin.
* Breakpoints on.
       - Read or Write
       - Register value 'is greater than', 'is less than', and
         'masked with' a value is true.
       - Break on line in listing window.

The registered version will support COD output format for compatiblity
with Microchips burners and emulators. The shareware version supports
only the PIC16C54 processor while the registered version supports the
entire PIC 16C5X processor family. The registered version supports
multiple processor simulations.

Additional processor families will be developed to support the entire
Microchip PIC processor families. Registered users will be notified
when these processors additions are available.

All the documentation for both the Assembler and MicroView environments
is online.

We are currently working on native language versions of these products
and will have them available soon. If you would be interested in
assisting language conversions to your native language, please contact
TRISYS at  spamBeGonetrisysramp.com

Please send any questions or comments to:
               spam_OUTtrisysSTOPspamramp.com.
We can also be reached on the Microchip bulletin board. Post messages
in the 3rdparty forum or send mail to trisys.

                               Enjoy
                   David Foringer (TRISYS, Inc.)
 

'[72677.2623@CompuServe.COM: Re: Errors from MPALC]'
1994\06\18@154102 by eric

At his request, I am forwarding a message from Don Lekei
<RemoveME72677.2623spamCompuServe.COM>.  For the record, I completely agree with him,
and I use the TRIS instruction routinely.  In my previous message which Don
quotes, I just presented all three ways of accessing the TRISA and TRISB
registers.

I should point out for the benefit of those using the 16C71 that the TRISA
register on the current parts doesn't actually have a bit for PA4.  If you
write anything to PORTA with bit four low, it will drive PA4 low regardless of
what you have written to the TRISA register.  The errata covers this, but in a
confusing manner.  Mike Jedrezewski (sp?) of Microchip told me that there is a
new rev of the 16C71 silicon due out soon which is supposed to fix all known
errata, including the missing TRISA bit.  I've also heard unofficially that
a 16C71A should be out in early '95, with improved performance (possibly
>20 MHz) and lower power consumption.

Eric
------------------------ Don Lekei's message follows  ------------------------
>Date: 18 Jun 94 13:23:40 EDT
>From: Don Lekei <TakeThisOuT72677.2623spamRemoveMECompuServe.COM>
>To: "INTERNET:KILLspamericspamspam_OUTapache.telebit.com" <ericRemoveMEapache.Sunnyvale.Telebit.COM>
>Subject: Re: Errors from MPALC

In the previous message, Eric Smith refers to Microchip's documentation:

>Microchip is trying to discourage people from using the tris instructions,
>and claim that they may be removed from future parts.

This advice from Microchip is some of the highest ranked BAD ADVICE in the
history of PIC programming. It is right up there with starting your code at
location zero in any PIC (other than an '84)!

You should ALWAYS use the TRIS instruction, unless it is necessary to
modify the TRIS register (eg. bi-directional i/o or open-drain emulation).

1)  It is better to maintain code compatability and portability to the
existing economical PIC parts (5x) rather than some mythical future part.

2)  TRIS takes less code and fewer cycles than accessing registers in bank
2.

3)  MPSIM will not correctly track changes directly adjusting bank 2
registers.

4)  If Microchip ever actually does remove the TRIS instruction on a future
part, then it is far more portable to define a macro to emulate the TRIS
instruction on that part, than to cut-off backward compatability with 16c5x
parts.

I just HAD to jump in here, it makes my skin crawl whenever I read that
part of the data sheet.

- Don

PS. Another handy way to start a lively thread is to mention using EQU to
define data addresses.

'Beta testers wanted for disassembler'
1994\06\21@122724 by -robotics-research-centre.salford.ac.uk (Ian King)n/a

'16C71 problems with RA being cleared'
1994\06\21@142528 by johnsonj

I am programming an 71' series and whenever I issue a clrb ra.4 which is
the open collector pin all of the RA ports are set to 0.  This is really
screwing me over hard as the other RA ports are control lines that
respond 4x as fast as my PIC thus I end up over driving my lines.  Any
ideas? is this a flaw with the 71?  If you think you know what i am
talking about and want more info email me.  I really could use some help.
later
       John

_____________________________________________________________________________
John Johnson                   |If it's not OS/2.|EraseMEjohnsonjSTOPspamRemoveMEccwf.cc.utexas.edu
                              |It's crap!       |spam_OUTjohnsonjRemoveMEEraseMEghostwheel.bga.com
OOOO SSSS    /2222  2222    11 |                 |
O  O S      /    2     2     1 |"We need breath- |"Bite me." Tom Servo
O  O SSSS  /  2222  2222     1 |-ing room!"      |
O  O    S /   2     2    ..  1 |     Bill Gates  |"I want to decide who lives
OOOO SSSS/    2222  2222 .. 111|                 |and who dies" Crow T. Robot
-----------------------------------------------------------------------------

'Parts, serial number'
1994\06\21@160115 by Stefan R. Jacob

> frame and the number is 244364266 not 144 as I mentioned in another
> letter. If you can check out the year for me I would appreciate it. I

Howdy,

it so happens that we are in possession of a complete stack of genuine
old British Leyland microfilms picked up at a bankruptcy auction (they
were stashed away in the drawer of a desk we took along!). So, courtesy of
(now defunct) BRANDO Automotives of Holland, here are the details for
your serial number #244364266 :

* 1964 ser.IIA 88" swb (non-station) 4 cyl.petrol lh-drive export version *

Will that do?

   So long,

Stefan R. Jacob  <TakeThisOuT100043.2400RemoveME@spam@CompuServe.com>
LROC of Hessen
Wiesbaden, Germany

'16C71 problems with RA being cleared'
1994\06\21@232836 by johnsonj

On Tue, 21 Jun 1994, Eric Smith wrote:

> Is "CLRB" one of the Parallax instructions?  What does it actually assemble
> into?  Hopefully a "BCF"?  I avoid the Parallax instructions like the plague;
> IMHO all they do is obfuscate the code.  Sometimes I define macros, but
> certainly not to make it look like an 8051.
I actually like them.  While not true Microchip instructions, I think they
read better.  In actuality all they are are macros.  Plus I am overly fond of
their simulator, Microchips is better in some places though, well most
actually.

>
> There are various wierd problems that can occur when you try to use BCF and
> BSF (or any other read/modify/write instructions, such as INCF) on I/O ports.
> I can't be sure exactly what's happening without knowing more about how you
> are using the other port A pins.
I called microchip and they knew of the problem.  It deals with the fact that
ra.4 does not have tris bit for it.  Screw up in the mask.  If i had
taken time to dl the eratta sheets on teh 71 I would have found this out.
And yes it does stim directly from your above statement.  when you bcf
5,4 the whole tris reg gets messed up and you can end up driving the pin
w/o any output(ouch)
>
> A common problem (but not necessarily the one troubling you) is that the the
> read/modify/write instructions read the actual voltage level at the pin, not
> the bit in the output latch.  If external hardware drives the lines this
> can cause unexpected behavior.  For instance, if you write $ff to the port, and
> external hardware is forcing PA0 low, and then you do a BCF porta,4, the output
> latch for PA0 will be set to 0, and the chip will start driving it low.
ummm yup exactly what happend.  Ended up sucking a whole lot of current.  
Almost 200mA.
>
> I'd recommend writing the entire port with a MOVWF when you want to change it.
> (Microchip recommends this also for a different reason).
wheter you recommend it or not is irrelevent :) its the only way around
my problem.  So in fact your suggestion is not mearly a suggestion but
law..
thanks for your help. and to all of the others who offered me help too..
live long and PIC, sorry I just had to say it
_____________________________________________________________________________
John Johnson                   |If it's not OS/2.|EraseMEjohnsonjRemoveMEccwf.cc.utexas.edu
                              |It's crap!       |spamjohnsonj.....spamghostwheel.bga.com
OOOO SSSS    /2222  2222    11 |                 |
O  O S      /    2     2     1 |"We need breath- |"Bite me." Tom Servo
O  O SSSS  /  2222  2222     1 |-ing room!"      |
O  O    S /   2     2    ..  1 |     Bill Gates  |"I want to decide who lives
OOOO SSSS/    2222  2222 .. 111|                 |and who dies" Crow T. Robot
-----------------------------------------------------------------------------

'Programing OTP-Versions'
1994\06\22@022454 by William Chops Westfield

1994\06\22@045832 by nger

1994\06\22@065041 by Richard Steven Walz

Listen up, folks. From an old physicist here of no particular note: The thing
we wish to accomplish is to erase EPROM cells in OTP's, which, near as I can
tell are just the die without the quartz window and more expensive ceramic
package. Now, I'll agree that most of all x-rays will pass right through,
(although a heavy bombardment over a long period of time might work), the
best way to erase EPROM is by the production of <273nm photons on the die
by x-ray flourescence. Now this may take finding the right energy x-rays
by fiddling the voltage up and down till you find the threshhold of best
flourescent conversion at that frequency. Another thing which might need to
be explored is whether another sheet of x-ray flourescent material might be
placed over and under the OTP's which would bring the x-rays down to the level
needed to further flouresce downward toward 273nm. It is possible that the
x-ray tubes commonly used are higher energy than will properly or most
efficiently flouresce. A good bet is metals and heavier elements. These are
options that someone with an industrial x-ray machine might attempt. It very
well could be that x-rays at some common medical or inustrial voltage could
do it. If it hasn't been researched, it sure sounds like it would be worth
exploring. Geez, you could start your own business erasing them for a song,
if it worked!
-Steve Walz   rstevewspam_OUT@spam@armory.com
---------------------------------------------

From: William "Chops" Westfield <.....billwspam.....cisco.com>
To: radingerKILLspamEraseMEzinfo.zess.uni-siegen.de (Christoph Radinger)
Cc: EraseMEpic@spam@@spam@figment.mit.edu
Subject: Re: Programing OTP-Versions
Message-Id: <@spam@CMM.0.90.2.772277094.billwspamKILLspamglare.cisco.com>

   Hello, does anybody know if it is possible to erase the OTP-versions
   of the PIC 16C54 by X-rays? And if, how long does it take at what kind
   of x-ray have I to use?

"reasonable sources" say it won't work.  Xray frequencies "hot" enough
to get through the package go right through the silicon as well...

BillW, whose company was once stuck with a lot of obsolete microcode
      in expensive, high speed, OTP EPROMS...

'PIC Development Software'
1994\06\22@105031 by tom

> Date:          Fri, 17 Jun 1994 15:38:04 GMT
> To:            spamBeGonepicRemoveMEEraseMEfigment.mit.edu
> From:          David Foringer <RemoveMEtrisysKILLspamRemoveMEramp.com>
> Subject:       PIC Development Software

> TRISYS, Inc has placed two shareware packages 'idesw.zip' and 'mvsw.zip'
> on ftp server ftp.sics.se in the /pub/mchipsoft directory area. (they
> should be made available for download by the sysop in a day or so, after

This is now available; Has anyone managed to get a run out of it yet ?
I tried to run the demo progs and get errors like;

can't POP - stack full

Or words to that effect.  


I also get run time errors <stack overflow> Same problem ??
Comments anyone ?
--
Cheers
                                     Tom

'PIC Software Development.'
1994\06\22@131629 by trisys

'PIC Development Software.'
1994\06\22@135522 by trisys

'BASIC stamp?'
1994\06\22@163155 by Srikanth Viswanathan

'1684 assembler required '
1994\06\23@054627 by Sean Lange

'apnset02.zip corrupt '
1994\06\23@104351 by kellenbe

Hi folks,

I4ve had some problems unzipping the file
"/pub/mchipsoft/mchipsoft/picapp/apnset02.zip" at ftp.sics.se.
(double-zipped file math.zip is corrupted)
Could anybody unzip it ??? I used the newest version (2.04g) of PKWARE's
pkunzip.exe for DOS. PKZIPFIX didn't work either. Perhaps this file should be
renewed! Others are OK.

Does anybody already have some experience with the MPASM (by Byte Craft Limited
of Waterloo and MCHIP itself)??? I got MPASM___.ZIP from the MCHIP BBS.
It seems to become the new enhenced general assembler for the PIC families or
is it already destributed along with any HW-tools? I'm just working with
the PICSTART-16B. There should also be a C-Compiler (MPC) soon! Am I right?
Please give me some respond about it...

By the way, for my research (MEMS) I designed a simple "Multi process Kernel"
for the PIC 16C71. All my programms (3 to be exact) now base on it. The main
part is an interrupt manager which branches to several processes (subroutines)
and it supports a serial line (RS 232/485 - half or full duplex) by interrupt
up to 19.6kB (8N1). A simple protocoll is suggested and only 7 file registers
are used for its minimum running (CRCs and double FSRs are also available
(+4bytes)).
The kernel exchanges serial data via two fileregisters and Ready/Send flags.
Errors are also flagged.
The usage of this "MpK" is fast and easy: fill up the empty structure with your
own code, data and initialization.

Is there any interest for it ???

I indent to send the code to the PIC code library at TakeThisOuTtomtakdsign.demon.co.uk!


Thanks

- Michael Kellenberger

'1684 assembler required'
1994\06\23@113557 by trisys

'apnset02.zip corrupt'
1994\06\23@113559 by trisys

>
>Hi folks,
>
>I4ve had some problems unzipping the file
>"/pub/mchipsoft/mchipsoft/picapp/apnset02.zip" at ftp.sics.se.
>(double-zipped file math.zip is corrupted)
>Could anybody unzip it ??? I used the newest version (2.04g) of PKWARE's
>pkunzip.exe for DOS. PKZIPFIX didn't work either. Perhaps this file should be
>renewed! Others are OK.
>
>Does anybody already have some experience with the MPASM (by Byte Craft
Limited
>of Waterloo and MCHIP itself)??? I got MPASM___.ZIP from the MCHIP BBS.
>It seems to become the new enhenced general assembler for the PIC families or
>is it already destributed along with any HW-tools? I'm just working with
>the PICSTART-16B. There should also be a C-Compiler (MPC) soon! Am I right?
>Please give me some respond about it...

Yes there will be a C compiler out soon. I think it already is.. from BYTECRAFT.
There was a mail message earlier in this mail forum which had much better
detail about what was available.. But I did not save it sorry... Maybe
somone else will repost it?? (hint)

{Quote hidden}

>
>By the way, for my research (MEMS) I designed a simple "Multi process Kernel"
>for the PIC 16C71. All my programms (3 to be exact) now base on it. The main
>part is an interrupt manager which branches to several processes (subroutines)
>and it supports a serial line (RS 232/485 - half or full duplex) by interrupt
>up to 19.6kB (8N1). A simple protocoll is suggested and only 7 file registers
>are used for its minimum running (CRCs and double FSRs are also available
>(+4bytes)).
>The kernel exchanges serial data via two fileregisters and Ready/Send flags.
>Errors are also flagged.
>The usage of this "MpK" is fast and easy: fill up the empty structure with your
>own code, data and initialization.
>
>Is there any interest for it ???

Yea! sounds like a good start for a lot of projects!! Microchip should use
code pieces like that for their app notes..

>
>I indent to send the code to the PIC code library at spamBeGonetomKILLspamTakeThisOuTtakdsign.demon.co.uk!
>
>
>Thanks
>
>- Michael Kellenberger
>


               Thanks..
                       David Foringer (TRISYS, Inc.)

       

1994\06\23@115643 by Martin Nilsson

Michael,

You wrote:

> I4ve had some problems unzipping the file
> "/pub/mchipsoft/mchipsoft/picapp/apnset02.zip" at ftp.sics.se.
> (double-zipped file math.zip is corrupted)
> Could anybody unzip it ??? I used the newest version (2.04g) of PKWARE's
> pkunzip.exe for DOS. PKZIPFIX didn't work either. Perhaps this file should be
> renewed! Others are OK.

You are right. We are hoping for Alex Baker from Microchip to upload
new versions. We just got the following message at SICS:

{Quote hidden}

> First of all I should introduce myself properly - my name is Alex
> Baker, and I am Northern European Field Applications Engineer for
> Arizona Microchip, based in their Bourne End, Bucks, UK office. The
> geographical area I cover includes all of Scandinavia, Benelux and
> the UK.
>
> One of my current objectives is to start publicising the fact that I
> have an Internet email address, which people can use to communicate
> tech problems, comments etc. to Microchip in general; this is
> particularly following comments from you guys (the customers) during
> a seminar series I did in Sweden with Anders and the guys from Memec.
> You all apparently want Internet access to our BBS system and I feel
> that this is the first stage.
>
> To bring you up to date, full Internet access to the Microchip BBS is
> under consideration, but I notice from using archie that you are one
> of the sites across the world who already has a major portion of the
> files on the BBS available for anonymous FTP. My concern is that
> maybe you possibly don't have all the latest files. What follows is a
> list of files, pulled off the BBS yesterday. I have all of these
> available on my local PC, which I can upload via FTP to you.

<text skipped>

> Alex Baker                                           Phone: +44 628 851077
> Norther European Field Applications Engineer         Fax:   +44 628 850259
> Arizona Microchip Technology                         Car:   +44 831 494921
> Email: Alex Baker on Microchip BBS or EraseMEalex.....KILLspammicrochp.demon.co.uk

So hopefully, the complete set of Microchip BBS files will soon be
available by anonymous ftp from ~ftp/pub/mchipsoft/ at sics.se.  Let's
keep up the pressure on Microchip becoming a full internetter!

Martin Nilsson
Swedish Institute of Computer Science    E-mail: spammnsics.se
Box 1263, S-164 28 Kista                 Fax: +46-8-751-7230
Sweden                                   Tel: +46-8-752-1574

'1684 assembler required'
1994\06\23@200310 by Don Lekei

'MicroChip Seminar!'
1994\06\26@121246 by John Johnson

1994\06\26@140515 by dthomas

1994\06\26@184944 by michael.blyler

    Companies like Microchip and Maxim are generous, and they bend over
backwards to treat little guys (onesy-twosy quantity users) like us just
like they do their large quantity consumers.  We should not abuse that
all-too-often-missing respect by being pigs.  I say this with no venom
toward John.  I used to be EXACTLY the same way.  I've been to many
seminars (including this one), some free, others for cost.  Distributor reps
are happy to give samples, especially if your project might lead to volume
purchasing, but they do have finite sample budgets.  They would rather give
a sample to 10 different developers than give one guy 10 parts, and two
years later have nine of them still be on his shelf.  I've been told by
several to ask for what you really need when you really need it, but don't
get parts just because you can get them.  Remember, we're all in this
together.  Abuse of generosity leads to less generosity.  We have to give
respect in order to get it.  Don't kill the goose for us all.

    As for the seminar itself, it was good, but I thought something was
missing.  The presentation only had one viewgraph showing the architecture
of the PIC processors, and very little discussion of their Harvard
architecture implementation.  I had the feeling that I must have been the
only one in the room who had never written a PIC program before, and that
the seminar was more intended to show new parts to current users than to
introduce users of competitor parts to the PIC.  Coming (NOT comming) from
Motorola 6801/05/11 programming, the PIC seems a bit strange.  I know it's
just a matter of digesting the material in the data book and getting a PIC
program under my belt, but I was surprised that the seminar "loot" did not
include a PIC software programmer's reference/guide.  A thirty minute
discussion of the architecture, registers, and instructions would have saved
me a lot of time getting started.  I second John's opinion, though, that the
seminar is well worth the price of admission.
----------------------------------------------------------------
In message Sun, 26 Jun 1994 12:12:45 -0500 (CDT),
 John Johnson <johnsonjSTOPspambga.com>  writes:

{Quote hidden}

> It was great.  If you havent gotten to go to it and its still comming to
> your city GO!  I got tons of loot from them.  New data books, EEPROMS,
> and a $100 programmer whith $30 of chips in it and another one of those
> niffty litle screwdrivers(that i always loose).  They also gave me a free
> copy of there MPASM.EXE and the manual to it.  It was really
> interesting to hear about their new products that they are comming out
> with. Plus I learned  a lot about their product line.  All of my local
> venders  where there too.  I talked to all of them and sucked up really
> hard(they  did too).  I got them ALL to send me samples of teh whole
> product line.   Pioneer already sent me the entire set(seminar was WED).
> I have a  EEPROM of everything: 54,55,56,57,64,71 and the EE 84.  Plus
> she also gave  me two of each of the OTP's.  For $100 i got 10x what it
> cost me to go. later
>       John
>

----------------------------------------------------------------------
Michael L. Blyler                | michael.blylerSTOPspamKILLspamgtri.gatech.edu
Georgia Tech                     |
GTRI/EOEML                       | Georgia Tech Research Institute
Baker Building Room 214          | VOICE (404) 894-3324, 874-4987
Atlanta, Georgia  30332-0800     | FAX   (404) 894-5073, 894-6285
======================================================================

'mpsim and watchdog'
1994\06\27@030333 by nger

'PIC starter kits'
1994\06\28@040632 by Luciano Veronese

'Beta Pic Disassembler'
1994\06\29@085450 by -robotics-research-centre.salford.ac.uk (Ian King)n/a

'Is it real or is it PicBuster?'
1994\06\29@231333 by SMARTSIGNAL

'The CCS C Compiler (Milwaukee guy)'
1994\07\01@163455 by gorden

'Reading/Writing data EEPROM on 16C84 '
1994\07\03@002203 by manningc

'False Alarm -- Accessing EEPROM '
1994\07\04@042150 by manningc

'Networking the PIC and/or the BASIC STAMP...'
1994\07\06@005243 by Bob Armstrong

 Has anyone networked several PICs (or STAMPs) together ?
Did you use RS-485 ?  How about simply wiring toegether several
open-drain outputs on different PICs ?  Are there any examples
of software for networking ?

Thanks,
Bob Armstrong
@spam@bob.....spampoco-adagio.santa-clara.ca.us

1994\07\06@102756 by mbmoore

'Networking the PIC and/or the BASIC STAMP... '
1994\07\06@122105 by Edward Cheung

>From: Mark <spammbmoore..........bga.com>
>and an open protocol.  We simply connect multiple PICs together on an RS232
>line.  Their is a transmit and a recieve line (just like RS232).  The

This sounds a little like RS485.  I am curious why you decided not to
take this route as this would make you more compatible with other products
(including the line of home automation modules from Circuit Cellar).

YOurs, Ed

+---------------------------------------+-----------------------------------+
|          Edward Cheung, Ph.D.         |  The opinions expressed herein    |
|Satellite Servicing Robotics Laboratory|    do not necessarily reflect     |
|    NASA Goddard Space Flight Center   |       those of my employers'      |
|         Code 714.1, Bldg T11B         |                                   |
|          Greenbelt, MD 20771          |                                   |
|   301-286-1269(office) 286-1717(fax)  |  My next book:                    |
| Internet: cheung.....asylum.gsfc.nasa.gov | Statistics, Demos and Other Lies  |
+---------------------------------------+-----------------------------------+

'ASPIC bug'
1994\07\06@181922 by Don Lekei

A bug was just found yesterday in ASPIC: The internal definitions
of the bits in EECON1 are out by 1. As an interum fix, you should add
the following definitions to your declaration file (eg. REGS.ASM):

;REGS2 is defined as:
;        DEFSEG  REGS2,$80,$8C           ;special regs - bank2
;
         .seg  REGS2

               .ds 1
OPTION:         .ds 1   ;option register

OPTINIT         = %00001000     ;default OPTION register
                 ;||||||||
                 ;|||||||+---- \
                 ;||||||+----- |- Prescaler exponent
                 ;|||||+------ /
                 ;||||+------- PSA    : Prescaler dest: 1=WDT, 0=RTCC
                 ;|||+-------- RTE    : RTCC edge: 1=v 0=^
                 ;||+--------- RTS    : RTCC Source 1=EXT 0=INT
                 ;|+---------- INTEDG : INT (RB0) Edge: 1=^ 0=v
                 ;+----------- RBPU   : Port B weak pullup: 0=on

               .ds 3           ;PCL,STATUS,FSR image
TRISA:          .ds 1
TRISB:          .ds 1
               .ds 1            ;(tris C - UNUSED)
;******************************************************************
;** EECON1
;** *** NOTE *** WE NEED TO RE-DEFINE THE EECON1 BITS TO FIX A BUG
;** IN ASPIC 5.32! **DO NOT USE THE INTERNAL DEFINITIONS!!!
;**
;******************************************************************

EECON1:
B.RD            = 0,*           ;EEPROM READ
B.WR            = 1,*           ;EEPROM WRITE
B.WREN          = 2,*           ;WRITE ENABLE
B.WRERR         = 3,*           ;Write error flag
B.EEIF          = 4,*           ;EE write complete interrupt flag

--------------------------------------------------------------------
Use the bit B.RD whereever you would have used RD, etc. This will
not in any way interfere with automatic bank management etc.

Sorry for any inconvenience which may have been caused. Registered
users will be able to pick up the new beta in a couple of weeks. If
you need an update emailed to you, drop me an e-line.

Regards,

Don Lekei
KILLspam72677.2623spam_OUTcompuserve.com
BBS: (604)597-3479

'added protection 4 pics '
1994\07\11@120601 by mycal

'PIC Utilities for MPALC & I^2 C Code'
1994\07\13@072240 by john

A while ago I mailed the list with some storage allocation macros and
a threat to supply interested parties with code for I^2 C bus protocol
communications and timed finite state machines.  Part of that is done:
but the code is moderately long so I suggest that you collect it, if you
are interested from ftp.dai.edinburgh.ac.uk, file /pub/user/pic-utils.tar.

You will find there the storage allocation macros I posted earlier, and some
other useful macros, e.g. a configuration macro that supports defaulting for
conditional compilation switches (the things that, when you forget to put
/D xxx=1 on the command line, MPALC says something like "line 1: Crit" and
crashes your machine ;-), as well as code for a multi-master I^2 C package
supporting master transmit and slave receive with interrupt detection of start
conditions (so your PIC doesn't have to spend all its time watching the bus).
The individual files in the directory in the tar file contain more information.

The finite state code will follow, as will other bits of the I^2 C stuff and
a neat UNIX c-shell script that calculates all the register values for a PIC
16C71 given clock rate, RTCC tick rate desired, and descriptions of the pin
functions (e.g. digital output, analogue input, digital tristate, etc.).  I
didn't manage to do this today, 'cos I've got to go on holiday in about an hour.
The code is there for people in a hurry -- in a month there will be more.

Have fun,

John Hallam                             spam_OUTjohnTakeThisOuTaifh.ed.ac.uk
Dept. of Artificial Intelligence
University of Edinburgh
5 Forrest Hill
Edinburgh EH1 2QL

'AT-Keyboard on PIC?'
1994\07\13@182436 by ben

'PICs for trade.....'
1994\07\14@125803 by pablo

Anyone interested in trading two UV erasable PIC16C57s for two UV
erasable 16C56s?  I'll pay postage too - preferrably two-day US Post.
The two I'll give you haven't been used and I prefer that the 56s I get
to have not been erased more than 5 times.

--
------------------------------------------------------------------------------
If outside IBM network boundaries  _^_  please pay attention to the following:
I speak for myself, not IBM. What (o o) I say MAY be wrong. No action should
be taken on my opinion alone. -oOO-(_)-OOo-  (.....pablo.....RemoveMEnetmail.austin.ibm.com)
------------------------------------------------------------------------------

           -- Paul Greenwood --  (spam_OUTpabloTakeThisOuTEraseMEaustin.ibm.com)

'is there a known trap here.'
1994\07\14@181735 by eric

1994\07\14@182301 by Gary Gaskell

Hi,

I have a PIC16c57.

An elementary program I wrote runs fine on it.

A secondary piece of code runs fine in the simulator, but nevers runs on
the hardware (same hardware that runs a simplier but similar program).

Is there any known traps that I particularly should watch when I goto the
hardware?  I have spent the last two weekends on this problem, so any
advice would be appreciate.  I am happy to send my code to anyone that
may help solve the problem.

regards

Gary Gaskell
DSTC
Cooperative Research Centre for Distributed Systems Technology
Queensland University of Technology
Ph    +61-7-864 1051            FAX +61-7-864 1282
                               Email EraseMEgaskellspamBeGoneKILLspamdstc.qut.edu.au

1994\07\14@201554 by dthomas

'Magnetic Card readers & PIC's'
1994\07\15@103926 by ttkk

1994\07\15@133238 by mbmoore

'16c5X disassembler'
1994\07\15@135736 by Don Lekei

'16c74 availability'
1994\07\16@075211 by rb

>From: Alasdair MacLean <RemoveMEalasdairspamBeGonespamuk.ac.ed.aifh>


>I've seen replies to a few requests for help suggesting the use of
>either the 16C64 or 16C74. What I was wondering was whether the people
>suggesting using these ICs had ever used them themselves ? The reason I
>ask is because Microchip in the UK have been reluctant to make any
>promises of availability before Christmas for either, despite the fact
>that both have been advertised by distibutors already. I've heard
>rumours that Microchip have been having some production difficulties
>possibly due to their move to a new wafer fab facility for production of
>0.8 micron devices.
>I would be interested to hear if there is easier availability Stateside
>and if so, whether there have been any other problems with the new
>devices. I'm a bit reluctant to spend time developing a project based
>around either of these ICs only to find I can't get my hands on any or
>that there are problems with the device.

I telephoned Microchip UK the other to find out if I could get a sample
16c74 (or some) and they said that it was available, and I should contact my
dealer. I did so and several other dealers and they all said that they did
not have any in and did not expect any until October at the earliest. I
would also like to find out about programming tools for the '64 and '74 but
information seems to scarce.

Can anyone in the states get their hands on either tools or samples or both
and ship to the UK?
I am sure that there are other people here that would also like to get their
hands on these models - goodbye to those I/O pin blues!!!!.

Rory

'Floating point division error?'
1994\07\26@080909 by Derrick Early

'Bank switching behavior'
1994\07\26@113450 by greg

I'm using Parallax's assembler to target a 16C57.  I noticed an
interesting behavior:  When I use LCALL instruction to jump to a
sub-routine in another bank, subsequent jump instructions (JNZ, etc)
in the main code don't work correctly.  

This is because the LCALL sets the bank select bits.  When the RET
instruction is executed, these don't get reset back to the bank of the
LCALL.  So any 9-bit jumps go to the bank where the subroutine was
located!  This is easily fixed by using LSET just before the RET to set
the bank select bits back to the calling bank (which means you can only
call that subroutine from one bank).

Example:


 org 00h               ; bank 0
 lcall other_sub       ; call subroutine in bank 1
 mov w, some_variable  ; do something afterwards
 xor w, #012h
 jnz :not_twelve       ; this jump will not work correctly! Bank select
 ...                   ; bits are set to 01.
 ..
:not_twelve             ; this line will not be reached
 ...                   ; instead, jnz will jump to somewhere in bank 1
 ..

 org 200h              ; bank 1
other_sub               ; bank select bits are 01 at this point
 ...
 ..
 RET                   ; bank select bits do not change with this ret.

-------

Anyone have insight on this problem?  The LSET workaround is OK, but I'm
wondering if I'm missing something.

--
Greg Bell        | "Ever see a company's sales drop sharply due to an
@spam@gregspamcqt.com     |  annoying ad campaign?  You will."
-----------------------------------------------------------------------
CommQuest Technologies, Inc.     (619) 633-1618 x133

'Bank switching behavior '
1994\07\27@013408 by dthomas

'unused data lines on pic16c5x '
1994\07\27@120650 by mycal

1994\07\27@173253 by dpalmer

1994\07\28@000401 by dthomas