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cc65/libsrc/c64/kbhit.s

24 lines
348 B
ArmAsm

;
; Ullrich von Bassewitz, 06.08.1998
;
; unsigned char kbhit (void);
;
.export _kbhit
.include "c64.inc"
.proc _kbhit
ldx #0 ; High byte of return is always zero
lda KEY_COUNT ; Get number of characters
beq L9
lda #1
L9: rts
.endproc