Int 15/AH=84h

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 BIOS replacement with extensions by Peter Koehlmann / c't magazine

See Also: AH=84h"PS" - INT 10/AH=0Eh/CX=ABCDh

Category: Vendor-specific BIOS Extensions - Int 15h - V

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