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30 lines
634 B
NASM
30 lines
634 B
NASM
// Experiments with malloc() - a byte array
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.pc = $801 "Basic"
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:BasicUpstart(bbegin)
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.pc = $80d "Program"
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// Top of the heap used by malloc()
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.label HEAP_TOP = $a000
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.label BYTES = malloc.return
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bbegin:
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jsr malloc
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jsr main
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rts
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main: {
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ldx #0
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b1:
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txa
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sta BYTES,x
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inx
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cpx #0
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bne b1
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rts
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}
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// Allocates a block of size bytes of memory, returning a pointer to the beginning of the block.
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// The content of the newly allocated block of memory is not initialized, remaining with indeterminate values.
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malloc: {
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.const size = $100
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.label mem = HEAP_TOP-size
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.label return = mem
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rts
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}
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