HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                           INT 15,80 - Device Open


       AH = 80h
       BX = device id
       CX = process id


       on return:
       CF = 0 if successful
          = 1 if error
       AH = 80h for PC & PCjr
          = 86h for XT (BIOS after 11/8/82)


       - available on the AT, XT 286, PS/2 and XT with BIOS after 11/8/82
       - designed for use in simple multitasking

Esc or Alt-X to exit int 15,80 Home/PgUp/PgDn/End ←↑↓→