Added SF101 folder

Updated PCM

Author: furrtek

Diff for: PCM/pcm.v

@@ -1,6 +1,6 @@
 input CLK_68KCLKB,
-input nSDROE, nSDRMPX,
-input nSDPOE, nSDPMPX,
+input nSDROE, SDRMPX,
+input nSDPOE, SDPMPX,
 inout [7:0] SDRAD,
 input [9:8] SDRA,
 input [23:20] SDRA,
@@ -15,27 +15,26 @@ reg [7:0] PDLATCH;
 reg [23:0] RALATCH;
 reg [23:0] PALATCH;
 
-assign SDRMPX = ~nSDRMPX;
-assign SDPMPX = ~nSDPMPX;
+assign nSDRMPX = ~SDRMPX;
+assign nSDPMPX = ~SDPMPX;
 assign SDPOE = ~nSDPOE;
-assign nCEN = COUNT[1];
-assign nCLR = nSDPOE;
+assign CEN = ~COUNT[1];
 
-always @(posedge CLK_68KCLKB)
+always @(posedge CLK_68KCLKB or negedge nSDPOE)
 begin
-	if (!nCLR)
-		COUNT <= 2'b0;
+	if (!nSDPOE)
+		COUNT <= 0;
 	else
-		if (!nCEN) COUNT <= COUNT + 1'b1;
+		if (CEN) COUNT <= COUNT + 1'b1;
 end
 
 assign SDRAD = nSDROE ? 8'bzzzzzzzz : RDLATCH;
-always @(nCEN)
-	if (nCEN) RDLATCH <= D;
+always @(*)
+	if (COUNT[1]) RDLATCH <= D;
 
 assign SDPAD = nSDPOE ? 8'bzzzzzzzz : PDLATCH;
-always @(SDPOE)
-	if (SDPOE) PDLATCH <= D;
+always @(*)
+	if (!nSDPOE) PDLATCH <= D;
 
 assign A = nSDPOE ? RALATCH : PALATCH;
 

Diff for: SF101/sf101.v

@@ -0,0 +1,3 @@
+// Altera EPM7128 CPLD used in King Of Fighters '98 as protection device
+
+// To do...