102 lines
1.7 KiB
NASM
102 lines
1.7 KiB
NASM
SEG zeropageSegment
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; Generic src/dst copy pointers
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srcPointer WORD
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dstPointer WORD
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dstPointerEnd WORD
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SEG programSegment
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MACRO MEMSET
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IF {1} != "D"
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clc
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lda <{1}
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sta dstPointer
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adc <{3}
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sta dstPointerEnd
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lda >{1}
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sta dstPointer + 1
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adc >{3}
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sta dstPointerEnd + 1
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ELSE
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clc
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lda dstPointer
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adc <{3}
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sta dstPointerEnd
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lda dstPointer + 1
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adc >{3}
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sta dstPointerEnd + 1
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ENDIF
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lda {2}
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ldy #0
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.loop:
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sta (dstPointer),y
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inc dstPointer
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bne .skipInc
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inc dstPointer + 1
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.skipInc:
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ldx dstPointer
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cpx dstPointerEnd
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bne .loop
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ldx dstPointer + 1
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cpx dstPointerEnd + 1
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bne .loop
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ENDM
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SEG zeroPageSegment
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SEG programSegment
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MACRO MEMCPY
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IF {1} != "D"
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clc
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lda <{1}
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sta dstPointer
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adc <{3}
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sta dstPointerEnd
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lda >{1}
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sta dstPointer + 1
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adc >{3}
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sta dstPointerEnd + 1
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ELSE
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clc
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lda dstPointer
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adc <{3}
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sta dstPointerEnd
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lda dstPointer + 1
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adc >{3}
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sta dstPointerEnd + 1
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ENDIF
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lda <{2}
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sta srcPointer
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lda >{2}
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sta srcPointer + 1
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ldy #$0
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.loop:
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lda (srcPointer),y
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sta (dstPointer),y
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inc dstPointer
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bne .skipIncDst
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inc dstPointer + 1
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.skipIncDst:
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inc srcPointer
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bne .skipIncSrc
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inc srcPointer + 1
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.skipIncSrc:
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ldx dstPointer
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cpx dstPointerEnd
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bne .loop
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ldx dstPointer + 1
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cpx dstPointerEnd + 1
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bne .loop
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ENDM
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SEG programSegment
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MACRO MOV_WORD_MEM
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lda {2}
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sta {1}
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lda {2} + 1
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sta {1} + 1
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ENDM
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