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GBC: simplified BG palette read

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Bruno Duarte Gouveia
2018-12-25 17:27:23 +00:00
parent d4f6832267
commit 09abeee1cc
1 changed files with 2 additions and 11 deletions
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13
video.v
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@@ -319,11 +319,8 @@ reg [2:0] stage2_bgp_buffer [19:0]; //GBC only keep record of palette used for t
reg [7:0] stage2_wptr;
reg [7:0] stage2_rptr;
reg [4:0] bg_palette_rptr; //GBC
reg [2:0] bg_palette_rcnt;
wire [5:0] palette_index = (stage2_bgp_buffer[bg_palette_rptr] << 3) + (stage2_buffer[stage2_rptr]<<1); //gbc
wire [5:0] palette_index = (stage2_bgp_buffer[stage2_rptr[7:3]] << 3) + (stage2_buffer[stage2_rptr]<<1); //gbc
// apply bg palette
@@ -361,8 +358,6 @@ always @(posedge clk) begin
if(h_cnt == 455) begin
stage2_wptr <= 8'h00;
stage2_rptr <= 8'h00;
bg_palette_rptr <= 5'd0; //GBC
bg_palette_rcnt <= 3'b111;
end
if(stage1_clkena) begin
@@ -376,11 +371,7 @@ always @(posedge clk) begin
if(sprite_pixel_visible) stage2_data <= sprite_pix;
else stage2_data <= stage2_bg_pix;
stage2_rptr <= stage2_rptr + 8'd1;
bg_palette_rcnt <= bg_palette_rcnt - 3'd1;
if (bg_palette_rcnt==0)
bg_palette_rptr <= bg_palette_rptr + 5'd1;
stage2_rptr <= stage2_rptr + 8'd1;
end
end