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cc65/libsrc/cbm/c_ckout.s

19 lines
323 B
ArmAsm

;
; Ullrich von Bassewitz, 03.06.1999
;
; unsigned char __fastcall__ cbm_k_ckout (unsigned char FN);
;
.include "cbm.inc"
.export _cbm_k_ckout
_cbm_k_ckout:
tax
jsr CKOUT
ldx #0 ; Clear high byte
bcs @NotOk
txa
@NotOk: rts