Post by thread:PIC > NE2000 [OT]

I've seen a project on Circuit Cellar that used a microcontroller connected directly to a NE2000 card making it network-enabled, but there were insuffecient circuit and firmware details to build one (some of the project was proprietary). Does anyone have the pin/signal details for a standard NE2000-compatible card, and perhaps the command set for setup and tx/rx? I can make my way through the Linux drivers I find on the net (that's all the info I find software-wise), but none of those offer detailed explanations of the signals or commands. JB

> I've seen a project on Circuit Cellar that used a > microcontroller connected > directly to a NE2000 card making it network-enabled, but there were > insuffecient circuit and firmware details to build one (some > of the project > was proprietary). Funnily, I've just been reading the same article, but I don't agree that there are sufficient circuit & fw details there. The version connected to the ISA card is not proprietary; the Picoweb SMD based unit is. Also commercially available (for a tad more than $25, but it is a commercial venture). The diagram on the pdf is a bit small, but useable. Try http://www.picoweb.net for a larger schematic (look in downloads, breadboard schem); you'll also find a newer set of fw to download. Haven't had a chance to look at it yet, so can't comment. > Does anyone have the pin/signal details for a standard > NE2000-compatible > card, and perhaps the command set for setup and tx/rx? I can > make my way > through the Linux drivers I find on the net (that's all the > info I find > software-wise), but none of those offer detailed explanations of the > signals or commands. How about http://sunsite.tut.fi/hwb/co_ISA_Tech.htm for an ISA bus tech overview? As for the setup, I haven't written anything for an NE2000, but the DEC devices all had address space mapped in (in PCI space), and the setup was a 'simple' case of writing to the individual registers before setting the device going. (Oh, and finding out that the datasheet failed to mention that the device comes up in it's halted state...). The Linux drivers should give you an adequate overview of the register accesses, just consider them as address/data transactions across the bus. The minimal configuration detailed involved A0-A4, D0-D7, IORead, IOWrite and RESET all connected to the ucontroller. Almost everything else was tied as appropriate. Obviously, this is a bit too much for a 16F84 as it stands - perhaps a 16F87x would be a better bet? HTH Peter Bond

jb wrote: > > I've seen a project on Circuit Cellar that used a microcontroller connected > directly to a NE2000 card making it network-enabled, but there were > insuffecient circuit and firmware details to build one (some of the project > was proprietary). > > Does anyone have the pin/signal details for a standard NE2000-compatible > card, and perhaps the command set for setup and tx/rx? I can make my way > through the Linux drivers I find on the net (that's all the info I find > software-wise), but none of those offer detailed explanations of the > signals or commands. > > JB have you looked around at the RFC's they would probably have some pretty decent protocol specs although they are a pain to track down. I once found the a protocol specification to connect to a toaster. http://www.cis.ohio-state.edu/hypertext/information/rfc.html is a good place to start. Damon Hopkins

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Look at national semi's website (sorry, i've lost the internet address). There are data sheets for the original DP8390 controller and any other chips, that has been followed. The host interface and register set are described completely. Also look at realtek's website(http://www.realtek.com.tw), there are controller for ISA (RT8019S, very nice!) and PCI busses. I've done an attempt to connect their sales office to get a local dealer address, but no reply. Also an interesting alternative is Crystal Semi's CS8900, look at their website. Take a look on application notes of all three semiconductors, they are very nice. You may want information about internet protocols ? Look at http://www.isi.edu/rfc-editor/catagories/rfc-standard.html for an list of all active RFC's. Look at http://www.faqs.org/rfcs/rfc-activeV.html for a short description. I'm a PIC programmer for about several years, and i've also great know-how in TCP/IP and networking technologies. If i would have more private time, i would program a 16F876/7 to control either the RT8019S or CS8900, that's my favourites. But sorry, work and studying are eating all of my free time. Hope, i could help and give you some hints. Frank ------------------------------------------ GSP Sprachtechnologie GmbH Teltowkanalstr.1, 12247 Berlin Tel.: +49 (30) 769 929 - 78 Tel.: +49 (30) 769 929 - 12 f.wollenbergKILLspamgsp-berlin.de http://www.gsp-berlin.de {Quote hidden}> -----UrsprŸngliche Nachricht----- > Von: jb [.....jbKILLspam.....CI.GLENWOOD-SPRINGS.CO.US] > Betreff: PIC > NE2000 [OT] > > Does anyone have the pin/signal details for a standard > NE2000-compatible > card, and perhaps the command set for setup and tx/rx? I can > make my way > through the Linux drivers I find on the net (that's all the > info I find > software-wise), but none of those offer detailed explanations of the > signals or commands. > > JB >

"Wollenberg, Frank" wrote: > > Look at national semi's website (sorry, i've lost the internet address). > There are data sheets for the original DP8390 controller and any other > chips, that has been followed. The host interface and register set are > described completely. Also look at realtek's website(http://www.realtek.com.tw), > there are controller for ISA (RT8019S, very nice!) and PCI busses. I've done > an attempt to connect their sales office to get a local dealer address, but > no reply. > Also an interesting alternative is Crystal Semi's CS8900, look at their > website. > Take a look on application notes of all three semiconductors, they are very > nice. > > You may want information about internet protocols ? > Look at http://www.isi.edu/rfc-editor/catagories/rfc-standard.html for an > list of all active RFC's. > Look at http://www.faqs.org/rfcs/rfc-activeV.html for a short description. http://www.national.com/ds/DP/DP83840A.pdf