please dont rip this site

Function 1Ch Get File Allocation Table Information for Specific Device

Returns information on specified drive

entry AH 1Ch

DL drive number (1=A, 2=B, 3=C, etc)

return AL number of sectors per allocation unit (cluster)

DS:BX address of media descriptor byte for drive in DL

CX sector size in bytes

DX number of allocation units (clusters)

note 1) DL = 0 for default.

2) Save DS before calling this function.

3) Format of media-descriptor byte:

bits: 0 0 (clear) not double sided

1 (set) double sided

1 0 (clear) not 8 sector

1 (set) 8 sector

2 0 (clear) nonremovable device

1 (set) removable device

3-7 always set (1)

4) This call returned a pointer to the FAT in DOS 1.x. Beginning with

DOS 2.00, it returns a pointer only to the table's ID byte.

5) IBM recommends programmers avoid this call and use int 25h instead.

file: /Techref/INT/21f/1c.htm, 1KB, , updated: 1999/2/20 11:26, local time: 2023/9/26 19:33,

 ©2023 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF=""> INT 21f 1c</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type a nice message (short messages are blocked as spam) in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.

Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?


Welcome to!


Welcome to!