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| author | Miquel Sabaté Solà <msabate@suse.com> | 2023-11-27 10:31:03 +0100 |
|---|---|---|
| committer | Miquel Sabaté Solà <mikisabate@gmail.com> | 2025-02-04 21:02:54 +0100 |
| commit | cee93625989b651cfe91387eabd0abd3f64a00df (patch) | |
| tree | d1525bd15c191c2926ea1166263b249a8bbeb79c /scroll/include/palettes.s | |
| parent | 0e1839f48ada69b81f5879449d0e0fe435f851c5 (diff) | |
| download | code.nes-cee93625989b651cfe91387eabd0abd3f64a00df.tar.gz code.nes-cee93625989b651cfe91387eabd0abd3f64a00df.zip | |
scroll: Start with the scrolling examples
This is still work in progress but at least there's some basic structure
to it.
Signed-off-by: Miquel Sabaté Solà <msabate@suse.com>
Diffstat (limited to 'scroll/include/palettes.s')
| -rw-r--r-- | scroll/include/palettes.s | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/scroll/include/palettes.s b/scroll/include/palettes.s new file mode 100644 index 0000000..9403b7b --- /dev/null +++ b/scroll/include/palettes.s @@ -0,0 +1,30 @@ +;; Shared code for palettes across scrolling examples. +.scope Palettes + DEFAULT_COLOR = $11 + + ;; Copies all the palettes for our game into the proper PPU address. + .proc init + PPU_ADDR $3F00 + + ldx #0 + @load_palettes_loop: + lda palettes, x + sta PPU::DATA + inx + cpx #$20 + bne @load_palettes_loop + rts + palettes: + ;; Background + .byte DEFAULT_COLOR, $36, $17, $0F + .byte DEFAULT_COLOR, $00, $00, $00 + .byte DEFAULT_COLOR, $00, $00, $00 + .byte DEFAULT_COLOR, $00, $00, $00 + + ;; Foreground + .byte DEFAULT_COLOR, $28, $0F, $30 + .byte DEFAULT_COLOR, $00, $00, $00 + .byte DEFAULT_COLOR, $00, $00, $00 + .byte DEFAULT_COLOR, $00, $00, $00 + .endproc +.endscope |