[<<Previous Entry]
[^^Up^^]
[Next Entry>>]
[Menu]
[About The Guide]
Set device information (INT 21h, 4401h)
Entry:
AH = 44h
AL = 1
BX = Handle
DX = Device information (DH must be zero)
1xxx xxxx xxxx xxxx Reserved
x1xx xxxx xxxx xxxx 1=IOCTL 2-5 allowed
xx11 1111 xxxx xxxx Reserved
xxxx xxxx 1xxx xxxx 0=Disk file, 1=Device
xxxx xxxx x1xx xxxx End-of-file
xxxx xxxx xx1x xxxx Binary mode
Disk file:
xxxx xxxx xxx1 1111 Device number (A=0, B=1 ...)
Device:
xxxx xxxx xxx1 xxxx Reserved
xxxx xxxx xxxx 1xxx 1=Clock device
xxxx xxxx xxxx x1xx 1=Nul device
xxxx xxxx xxxx xx1x 1=Console Output device
xxxx xxxx xxxx xxx1 1=Console Input device
Return:
if CF = 1
AX = Error Code
See Also:
INT 21h, 4400h
This page created by ng2html v1.05, the Norton guide to HTML conversion utility.
Written by Dave Pearson