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32 lines
776 B
Plaintext
32 lines
776 B
Plaintext
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;ACME 0.95.7
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!ifdef lib_cbm_c64_memmove_a !eof
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lib_cbm_c64_memmove_a = 1
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; this macro inserts code to move a memory block.
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; it calls a function from the basic interpreter, so:
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; - BASIC ROM must be banked in
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; - the source block must be below $a000 so it can be read
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; source and target blocks are allowed to overlap.
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!macro basic_memmove .src_start, .src_end, .target_start {
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!address {
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.z_target_end = $58
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.z_src_end = $5a
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.z_src_start = $5f
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.fn = $a3bf
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}
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lda #<.src_start
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ldx #>.src_start
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sta .z_src_start
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stx .z_src_start + 1
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lda #<.src_end
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ldx #>.src_end
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sta .z_src_end
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stx .z_src_end + 1
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lda #<(.target_start + .src_end - .src_start)
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ldx #>(.target_start + .src_end - .src_start)
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sta .z_target_end
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stx .z_target_end + 1
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jsr .fn
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}
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