2019-11-16 22:09:22 +00:00
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#importonce
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.filenamespace Memory
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#import "mem_map.asm"
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* = * "Memory Routines"
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// move memory down
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//
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// from = source start address
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// to = destination start address
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// size = number of bytes to move
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//
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clone:
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ldy #0
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2019-11-17 07:41:00 +00:00
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ldx MemMap.MEMORY.size
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2019-11-16 22:09:22 +00:00
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beq md2
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2019-11-17 07:41:00 +00:00
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md1: lda (MemMap.MEMORY.from),y // move a page at a time
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sta (MemMap.MEMORY.to),y
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2019-11-16 22:09:22 +00:00
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iny
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bne md1
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2019-11-17 07:41:00 +00:00
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inc MemMap.MEMORY.from+1
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inc MemMap.MEMORY.to+1
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2019-11-16 22:09:22 +00:00
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dex
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bne md1
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2019-11-17 07:41:00 +00:00
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md2: ldx MemMap.MEMORY.size+1
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2019-11-16 22:09:22 +00:00
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beq md4
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2019-11-17 07:41:00 +00:00
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md3: lda (MemMap.MEMORY.from),y // move the remaining bytes
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sta (MemMap.MEMORY.to),y
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2019-11-16 22:09:22 +00:00
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iny
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dex
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bne md3
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md4: rts
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