31 lines
532 B
ArmAsm
Executable file
31 lines
532 B
ArmAsm
Executable file
;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*-
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;; Sets memory in A to all addresses from B_start to B_end
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;; Modifies A, X and B_start
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.proc memset
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.include "mem.inc"
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;;put what to recursive write in Y.
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LDX #$0
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TAY
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loop:
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;;write to byte
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TYA
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STA (>B_start ,X)
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Add_16 >B_start, <B_start, #$01, #$00
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LDA >B_start
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CMP >B_end
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BEQ test
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jmp loop
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test:
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LDA <B_start
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CMP <B_end
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BEQ end
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jmp loop
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end:
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;;Dont forget to rewrite last byte
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TYA
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STA (>B_start, X)
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RTS
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.endproc
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