rob@jimi.UUCP (SYS$REALNAME) (02/06/91)
In article <8266@ucdavis.ucdavis.edu>, chiang@iris.ucdavis.edu (Tom Chiang) writes: > [some code deleted] >kidone: > push dx ----- > push ax | > mov dl,'z' | > mov ah,5H | ----- these are the instructions i added > int 21H | > pop ax | > pop dx ------ > iret >new_keyboard_io endp > The only DOS functions that are safe to call in this ISR are 0h-0Ch. The Waite Group's 'MS-DOS Bible' has an excellent example and explanation of TSR's. Rob Carlson