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Correct wide layer offset when flipped.

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Only the most significant bit of the vram base should be used for wide layers.
This commit is contained in:
Martin Donlon
2023-05-01 08:57:12 -07:00
parent 09d81becd0
commit c69a052d49
1 changed files with 2 additions and 2 deletions
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4
rtl/ga23_layer.sv
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@@ -58,10 +58,10 @@ wire wide = control[2];
wire enabled = ~control[4] & dbg_enabled;
wire en_rowscroll = control[6];
wire [9:0] x = x_base + ( en_rowscroll ? rowscroll : x_ofs );
wire [6:0] tile_x = x[9:3] + ( wide ? 7'd32 : 7'd0);
wire [6:0] tile_x = NL ? ( x[9:3] - ( wide ? 7'd32 : 7'd0) ) : ( x[9:3] + ( wide ? 7'd32 : 7'd0) );
wire [5:0] tile_y = y[8:3];
assign vram_addr = vram_base + (wide ? {1'b0, tile_y, tile_x[6:0], 1'b0} : {2'b00, tile_y, tile_x[5:0], 1'b0});
assign vram_addr = wide ? {vram_base[14], tile_y, tile_x[6:0], 1'b0} : {vram_base[14:13], tile_y, tile_x[5:0], 1'b0};
reg [3:0] cnt;