From d515cb8127f1d52131c568b7c7af7cf09ceeffd8 Mon Sep 17 00:00:00 2001 From: Bruno Duarte Gouveia Date: Mon, 5 Nov 2018 13:42:03 +0000 Subject: [PATCH] trigger interrupt earlier, on negedge --- gb.v | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gb.v b/gb.v index c814cb7..424847b 100644 --- a/gb.v +++ b/gb.v @@ -177,7 +177,7 @@ wire irq_n = !(ie_r & if_r); reg [4:0] if_r; reg [4:0] ie_r; // writing $ffff sets the irq enable mask -always @(posedge clk) begin +always @(negedge clk) begin //negedge to trigger interrupt earlier reg old_ack = 0; if(reset) begin