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Cleanup scanlines implementation

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This commit is contained in:
Sebastien Delestaing
2016-09-19 15:51:47 +02:00
parent f5f91da6a6
commit f7ee9f1e4d
1 changed files with 4 additions and 3 deletions
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7
cores/nes/src/video.v
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@@ -76,9 +76,10 @@ always @(posedge clkv) begin
end
wire [14:0] pixel_v = (!hpicture || !vpicture) ? 15'd0 : mode ? pixel : doubler_pixel;
wire [4:0] vga_r = mode ? pixel_v[4:0] : (v[0] & scanlines) ? {1'b0, pixel_v[4:1]} : pixel_v[4:0];
wire [4:0] vga_g = mode ? pixel_v[9:5] : (v[0] & scanlines) ? {1'b0, pixel_v[9:6]} : pixel_v[9:5];
wire [4:0] vga_b = mode ? pixel_v[14:10] : (v[0] & scanlines) ? {1'b0, pixel_v[14:11]} : pixel_v[14:10];
wire darker = !mode && v[0] && scanlines;
wire [4:0] vga_r = darker ? {1'b0, pixel_v[4:1]} : pixel_v[4:0];
wire [4:0] vga_g = darker ? {1'b0, pixel_v[9:6]} : pixel_v[9:5];
wire [4:0] vga_b = darker ? {1'b0, pixel_v[14:11]} : pixel_v[14:10];
wire sync_h = ((h >= (512 + 23 + (mode ? 18 : 35))) && (h < (512 + 23 + (mode ? 18 : 35) + 82)));
wire sync_v = ((v >= (mode ? 240 + 5 : 480 + 10)) && (v < (mode ? 240 + 14 : 480 + 12)));
assign VGA_HS = mode ? ~(sync_h ^ sync_v) : ~sync_h;