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Library: added cbm/c64/memmove.a with a macro to call $a3bf in basic interpreter

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git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@69 4df02467-bbd4-4a76-a152-e7ce94205b78
This commit is contained in:
marcobaye 2016-06-05 12:33:05 +00:00
parent 5240b5eff4
commit a6ca824eb7
1 changed files with 31 additions and 0 deletions
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ACME_Lib/cbm/c64/memmove.a Normal file
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;ACME 0.95.7
!ifdef lib_cbm_c64_memmove_a !eof
lib_cbm_c64_memmove_a = 1
; this macro inserts code to move a memory block.
; it calls a function from the basic interpreter, so:
; - BASIC ROM must be banked in
; - the source block must be below $a000 so it can be read
; source and target blocks are allowed to overlap.
!macro basic_memmove .src_start, .src_end, .target_start {
!address {
.z_target_end = $58
.z_src_end = $5a
.z_src_start = $5f
.fn = $a3bf
}
lda #<.src_start
ldx #>.src_start
sta .z_src_start
stx .z_src_start + 1
lda #<.src_end
ldx #>.src_end
sta .z_src_end
stx .z_src_end + 1
lda #<(.target_start + .src_end - .src_start)
ldx #>(.target_start + .src_end - .src_start)
sta .z_target_end
stx .z_target_end + 1
jsr .fn
}