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27 lines
510 B
ArmAsm
27 lines
510 B
ArmAsm
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; Piotr Fusik, 24.10.2003
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; originally by Ullrich von Bassewitz
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; CC65 runtime: Scale the primary register by 16
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;
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.export asrax4
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.importzp tmp1
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asrax4: stx tmp1
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cpx #$80 ; Put bit 7 into carry
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ror tmp1
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ror a
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cpx #$80
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ror tmp1
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ror a
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cpx #$80
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ror tmp1
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ror a
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cpx #$80
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ror tmp1
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ror a
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ldx tmp1
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rts
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