36 lines
676 B
ArmAsm
36 lines
676 B
ArmAsm
.define Aar
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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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! This subroutine gets the address of the array element
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Aar:
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stx ADDR ! address of descriptor (lowbyte)
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sta ADDR+1 ! address of descriptor (highbyte)
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ldy #0
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lda (ADDR),y ! lowerbound (lowbyte)
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tax
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iny
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lda (ADDR),y ! lowerbound (highbyte)
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jsr Sbi2 ! index - lowerbound
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jsr Push
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2: ldy #4
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lda (ADDR),y ! objectsize (lowbyte)
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sta NBYTES
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tax
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iny
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lda (ADDR),y ! objectsize (highbyte)
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sta NBYTES+1
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bne 5f
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cpx #1 ! objectsize = 1 then return
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bne 5f ! arrayaddress + index
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jsr Pop
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jmp Adi2
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5: jsr Mli2 ! objectsize > 1 then return
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jmp Adi2 ! arrayaddress + index * objectsize
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