Online HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens
INT 15,C4 - Programmable Option Select (PS/2)
AH = C4
AL = 0 get Programmable Option Select adapter register address
= 1 enable slot for setup
= 2 adapter enable
on return:
CF = 0 if successful
= 1 if error
AH = when CF set, 80h for PC & PCjr, 86h for XT, AT & 30
BL = slot number (function AL=1)
DL = POS adapter register address (function AL=0)
- allows access to PS/2 Programmable Option Select registers
- available on 80286 and 80386 PS/2's
[helppc.bosbyte.nl] int 15,c4