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JOYSTICK: fixed interrupt, was never triggered, fixes Double Dragon 3

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This commit is contained in:
Bruno Duarte Gouveia
2018-12-05 15:45:12 +00:00
parent c7705b5b5d
commit 8a15a3bfa4
1 changed files with 2 additions and 2 deletions
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gb.v
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@@ -225,7 +225,7 @@ wire [7:0] irq_vec =
wire vs = (lcd_mode == 2'b01);
reg vsD, vsD2;
reg [3:0] inputD, inputD2;
reg [7:0] inputD, inputD2;
// irq is low when an enable irq is active
wire irq_n = !(ie_r & if_r);
@@ -255,7 +255,7 @@ always @(negedge clk) begin //negedge to trigger interrupt earlier
if(serial_irq) if_r[3] <= 1'b1;
// falling edge on any input line P10..P13
inputD <= joy_p4 | joy_p5;
inputD <= {joy_p4, joy_p5};
inputD2 <= inputD;
if(~inputD & inputD2) if_r[4] <= 1'b1;