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Adjust the video blanking.

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sorgelig
2018-08-29 23:38:20 +08:00
parent 36c94f383e
commit fc151edbe5
1 changed files with 3 additions and 3 deletions
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6
ZX81.sv
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@@ -488,13 +488,13 @@ always @(posedge clk_sys) begin
if(cnt == 0) hsync2 <= 1;
if(cnt == 32) hsync2 <= 0;
if(cnt == 408) hblank <= 1;
if(cnt == 64) hblank <= 0;
if(cnt == 400) hblank <= 1;
if(cnt == 72) hblank <= 0;
old_hsync <= hsync;
if(~old_hsync & hsync) begin
vreg <= {vreg[3:0], vsync};
vblank <= |vreg;
vblank <= |{vreg,vsync};
vsync2 <= vreg[2];
if(&vreg[3:2]) cnt <= 0;
end