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42 lines
695 B
NASM
42 lines
695 B
NASM
// Illustrates symbolic array lengths
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.pc = $801 "Basic"
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:BasicUpstart(main)
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.pc = $80d "Program"
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.const ITEM_COUNT = 3
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.const ITEM_SIZE = 5
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// Fills the array item by item with $is, where i is the item# and s is the sub#
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main: {
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.label cur_item = 2
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lda #<items
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sta cur_item
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lda #>items
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sta cur_item+1
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ldx #0
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b1:
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ldy #0
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b2:
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txa
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asl
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asl
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asl
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asl
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sty $ff
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ora $ff
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sta (cur_item),y
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iny
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cpy #ITEM_SIZE-1+1
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bne b2
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lda #ITEM_SIZE
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clc
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adc cur_item
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sta cur_item
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bcc !+
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inc cur_item+1
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!:
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inx
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cpx #ITEM_COUNT-1+1
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bne b1
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rts
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}
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items: .byte 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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