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

Esc or Alt-X to exit int 15,c4 Home/PgUp/PgDn/End ←↑↓→