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cc65/libsrc/cx16/waitvsync.s

18 lines
327 B
ArmAsm

;
; 2019-09-26, Greg King
;
; void waitvsync (void);
;
; VERA's vertical sync. causes IRQs which increment the jiffy clock.
;
.export _waitvsync
.include "cx16.inc"
_waitvsync:
lda TIME + 2
: cmp TIME + 2
beq :- ; Wait for next jiffy
rts