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cc65/libsrc/c128/isfast.s

22 lines
299 B
ArmAsm

;
; Marco van den Heuvel, 2018-03-19
;
; unsigned char isfast (void);
; /* Returns 1 if the CPU is in 2MHz mode. */
;
.export _isfast
.include "c128.inc"
.proc _isfast
lda VIC_CLK_128
and #$01
ldx #$00
rts
.endproc