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Fix some comments in CNT module

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This commit is contained in:
Zane Kaminski 2023-04-09 22:47:27 -04:00
parent 625f7fd014
commit 59136e4e17
1 changed files with 5 additions and 5 deletions
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10
cpld/CNT.v
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@ -55,7 +55,7 @@ module CNT(
* 4096 states == 57.516 ms * 4096 states == 57.516 ms
* During operation (IS==3) long timer counts from 0 to 3 * During operation (IS==3) long timer counts from 0 to 3
* starting at first sound RAM access. * starting at first sound RAM access.
* 4 states == 56.168 us */ * Period is 28.124 us - 42.240 us */
reg [11:0] LTimer; reg [11:0] LTimer;
reg LTimerTC; reg LTimerTC;
always @(posedge CLK) begin always @(posedge CLK) begin
@ -81,21 +81,21 @@ module CNT(
wire ISTC = EFall && TimerTC && LTimerTC; wire ISTC = EFall && TimerTC && LTimerTC;
always @(posedge CLK) begin always @(posedge CLK) begin
case (IS[1:0]) case (IS[1:0])
2'h0: begin 0: begin
AoutOE <= 0; // Tristate PDS address and control AoutOE <= 0; // Tristate PDS address and control
nRESout <= 0; // Hold reset low nRESout <= 0; // Hold reset low
nBR_IOB <= 0; // Default to request bus nBR_IOB <= 0; // Default to request bus
if (ISTC) IS <= 1; if (ISTC) IS <= 1;
end 2'h1: begin end 1: begin
AoutOE <= 0; AoutOE <= 0;
nRESout <= 0; nRESout <= 0;
nBR_IOB <= !(!nBR_IOB && nIPL2r); // Disable bus request if NMI pressed nBR_IOB <= !(!nBR_IOB && nIPL2r); // Disable bus request if NMI pressed
if (ISTC && nIPL2r) IS <= 2; if (ISTC && nIPL2r) IS <= 2;
end 2'h2: begin end 2: begin
AoutOE <= !nBR_IOB; AoutOE <= !nBR_IOB;
nRESout <= 0; nRESout <= 0;
if (ISTC) IS <= 3; if (ISTC) IS <= 3;
end 2'h3: begin end 3: begin
nRESout <= 1; // Release reset nRESout <= 1; // Release reset
IS <= 3; IS <= 3;
end end