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https://github.com/a2-4am/4cade.git
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43 lines
796 B
Plaintext
43 lines
796 B
Plaintext
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;license:MIT
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;(c) 2019-2022 by 4am
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;
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!ifndef _FX_MACROS_DHGR_ {
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!macro COPY_TO_AUXMEM .startpage, .pagecount {
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ldx #.pagecount
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lda #.startpage
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sta $FF
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lda #$00
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sta $FE
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tay
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sta $C005
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- lda ($FE),y
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sta ($FE),y
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iny
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bne -
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inc $FF
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dex
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bne -
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sta $C004
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}
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!macro BUILD_MIRROR_COLS_DHGR .mirror_cols {
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; build lookup table to get $27-y for y in $00..$27
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; duplicate in both mainmem and auxmem
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ldx #$28
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ldy #$00
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- tya
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sta .mirror_cols-1, x
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sta $C005
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sta .mirror_cols-1, x
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sta $C004
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iny
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dex
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bne -
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; X=0
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}
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_FX_MACROS_DHGR_=*
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}
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