ALG106@PSUVM.BITNET (04/13/89)
I am writing a program in Turbo Pascal and need to get the scan codes from
when a key is released.
Actual problem is - I have to be able to tell when a key is pressed
when I have another key down. I also have to tell when original
key is released.
Thanks,
Andypathak@s.cs.uiuc.edu (04/21/89)
You may not have to write your own int9 routine. If all you want is the status of the shift keys, control keys, alt keys .... then you can use a BIOS function to do the same. int 16h func 02h call with: AH = 02h Returns in AL: Bit Significance if set 7 Insert on 6 Caps lock on 5 Num lock on 4 Scroll Lock on 3 Alt key down 2 Ctrl key down 1 left Shift down 0 right Shift down The enhanced keyboard that came with the AT and PS/2 can be read using: int 16h func 12h call with AH = 12h Returns in AL: Bit Significiance F SysReq down E Caps Lock down D Num Lock down C Scroll Lock down B right Alt A right Ctrl 9 left Alt 8 left Ctrl and the rest is the same as before Heeren Pathak s.cs.uiuc.edu