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39 lines
587 B
ArmAsm
39 lines
587 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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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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clc
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lda #4
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adc ptr4
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sta ptr4
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lda ptr4+1
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adc #$00
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pha ; High byte of new return address
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lda ptr4
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pha ; Low byte of new return address
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tya ; Low byte of fetched value
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rts
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