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cc65/libsrc/nes/waitvblank.s

19 lines
275 B
ArmAsm

;
; Written by Groepaz/Hitmen <groepaz@gmx.net>
; Cleanup by Ullrich von Bassewitz <uz@cc65.org>
;
; void waitvblank(void);
;
.export _waitvblank
.include "nes.inc"
.proc _waitvblank
wait: lda PPU_STATUS
bpl wait
rts
.endproc