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 10:26, local time: 2024/11/16 04:51,
3.135.216.29:LOG IN
|
©2024 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? <A HREF="http://linistepper.com/techref/INT/21f/1c.htm"> INT 21f 1c</A> |
Did you find what you needed? |