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39 lines
597 B
ArmAsm
39 lines
597 B
ArmAsm
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; Ullrich von Bassewitz, 29.12.1999
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; CC65 runtime: Load eax from immidiate value following the call
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;
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.export ldeax
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.importzp sreg, ptr4
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.macpack generic
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ldeax: pla ; Low byte of return address
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sta ptr4
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pla ; high byte of return address
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sta ptr4+1
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ldy #4 ; high byte of value
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lda (ptr4),y
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sta sreg+1
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dey
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lda (ptr4),y
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sta sreg
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dey
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lda (ptr4),y
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tax
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dey
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lda (ptr4),y
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tay ; Save low byte
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; Calculate the return address (remember: RTS address is one low) and
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; jump to it
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lda ptr4
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add #5
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sta ptr4
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bcc @L9
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inc ptr4+1
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@L9: tya ; restore low byte
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jmp (ptr4)
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