A multitasking program manager would be expected to capture Int 15H and provide the appropriate service. The default BIOS routine for this function simply returns with the carry flag clear and AH = 00H. See also Int 15H Functions 80H and 82H.Releases ownership of a logical device for a process.
Call with:
AH = 81H
BX = device ID
CX = process ID
Returns:
If function successful
Carry flag = clear
AH = 00H
If function unsuccessful
Carry flag = set
AH = status
Note:
A multitasking program manager would be expected to capture Int 15H and provide the appropriate service. The default BIOS routine for this function simply returns with the carry flag clear and AH = 00H. See also Int 15H Functions 80H and 82H.