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[C64] CIA: act on flag_n fully (pseudo)asynchronously

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This commit is contained in:
Gyorgy Szombathelyi
2019-04-12 13:51:38 +02:00
parent fbe5f1a085
commit 8e77b3f8c9
1 changed files with 2 additions and 2 deletions
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4
cores/c64/rtl/mos6526.v
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@@ -155,11 +155,11 @@ end
always @(posedge clk) begin
if (!res_n) icr[4] <= 1'b0;
else begin
if (!flag_n && flag_n_prev) icr[4] <= 1'b1;
if (phi2_p) begin
flag_n_prev <= flag_n;
if (int_reset) icr[4] <= 1'b0;
end
flag_n_prev <= flag_n;
if (!flag_n && flag_n_prev) icr[4] <= 1'b1;
end
end