Online HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens
INT 21,44,F / IOCTL,F - Set Logical Drive
AH = 44h
AL = 0F
BL = new drive number (0=default, 1=A:, 2=B:, 3=C:, ...)
on return
AX = error code if CF set (see DOS ERROR CODES)
AL = logical drive number (should be equal to BL input)
= 0 if drive accessed by only one drive specifier
= 1 if drive A:, 2 if drive B:, etc
- changes the logical drive designator of the physical drive
to be accessed next
- implemented from DOS 3.2
[helppc.bosbyte.nl] int 21,44,f