git.y1.nz

commit c909ac84db73b4f652857ca0768aa38b4557b82c
parent 8cf112460b22e147c6d70fca6b6176e183ee646c
Author: Toxa <56631470+untoxa@users.noreply.github.com>
Date:   Thu, 14 Sep 2023 10:49:43 +0300

Merge pull request #578 from michel-iwaniec/nes_set_bkg_based_tiles

NES bugfix: Actually apply _map_tile_offset for set_bkg_based_tiles
Diffstat:
M
gbdk-lib/libc/targets/mos6502/nes/set_bk_ts.s
5
+++++

1 file changed, 5 insertions(+), 0 deletions(-)
diff --git a/gbdk-lib/libc/targets/mos6502/nes/set_bk_ts.s b/gbdk-lib/libc/targets/mos6502/nes/set_bk_ts.s
@@ -8,6 +8,7 @@
     .ypos:                      .ds 1
     .num_rows:                  .ds 1
     .src_tiles:                 .ds 2
+    __map_tile_offset:          .ds 1
 
     .area   _HOME
 
@@ -54,6 +55,8 @@ _set_bkg_tiles_horizontalStripes:
     ldy #0
 2$:
     lda [*.src_tiles],y
+    clc
+    adc *__map_tile_offset
     iny
     jsr .ppu_stripe_write_byte
     dex
@@ -108,6 +111,8 @@ _set_bkg_tiles_verticalStripes::
     ldx *.height
 2$:
     lda [*.src_tiles],y
+    clc
+    adc *__map_tile_offset
     jsr .ppu_stripe_write_byte
     ; .src_tiles += width
     lda *.width

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