30 lines
424 B
ArmAsm
30 lines
424 B
ArmAsm
.define Sdi, Sdo
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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! The subroutine Sdi takes a fourbyte word and stores it
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! at the address in registerpair AX.
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! If the address is in zeropage, Sdo is used.
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Sdi:
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stx ADDR ! address (lowbyte)
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sta ADDR+1 ! address (highbyte)
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Sdo:
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ldy #0
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1: jsr Pop
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pha
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txa
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sta (ADDR),y ! store lowbyte
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iny
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pla
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sta (ADDR),y ! store highbyte
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iny
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cpy #4
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bne 1b
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rts
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