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cc65/libsrc/cx16/joyref.s

21 lines
446 B
ArmAsm

;
; 2019-12-22, Greg King
;
; Link an interrupt handler if joysticks are used by a program.
;
.interruptor joy_libref, 9
.include "cbm_kernal.inc"
.include "cx16.inc"
joy_libref:
lda VERA::IRQ_FLAGS
lsr a
bcc not_vsync
jsr JOYSTICK_SCAN ; Bit-bang game controllers
clc ; Let other Jiffy handlers run
not_vsync:
rts