25 lines
420 B
ArmAsm
25 lines
420 B
ArmAsm
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.define Ldi, Ldo
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! The subroutine Ldi pushes a four byte object onto the stack.
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! The address is in registerpair AX.
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! If the address is already in zeropage Ldo is used.
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Ldi:
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stx ADDR ! address of object (lowbyte)
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sta ADDR+1 ! address of object (highbyte)
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Ldo:
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ldy #3
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1: lda (ADDR),y ! get lowbyte
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pha
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dey
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lda (ADDR),y ! get highbyte
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tax
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pla
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jsr Push ! do the push
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dey
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bpl 1b ! perform 2 times
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rts
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