INT 15 - V20-XT-BIOS - JOYSTICK SUPPORT AH = 84h DX = subfunction 0000h read joystick switches Return: AL bits 7-4 = switch settings other: read positions of joysticks as indicated by bits 0-3 Return: AX = X position of joystick A (if DX bit 0 set) BX = Y position of joystick A (if DX bit 1 set) CX = X position of joystick B (if DX bit 2 set) DX = Y position of joystick B (if DX bit 3 set) Return: CF set on error AH = status (see #00496) CF clear if successful Program: V20-XT-BIOS is a ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. replacement with extensions by Peter Koehlmann / c't magazine SeeAlso: AH=84h"PSIBM PS/2, any model",INT 10/AH=0Eh/CX=ABCDh