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24 lines
291 B
ArmAsm

;
; Piotr Fusik, 24.10.2003
; originally by Ullrich von Bassewitz
;
; CC65 runtime: Scale the primary register by 8
;
.export asrax3
.importzp tmp1
asrax3: stx tmp1
cpx #$80 ; Put bit 7 into carry
ror tmp1
ror a
cpx #$80
ror tmp1
ror a
cpx #$80
ror tmp1
ror a
ldx tmp1
rts