Showing with 13 additions and 4 deletions.

+13 −4 src/boards/eh8813a.c
diff --git a/src/boards/eh8813a.c b/src/boards/eh8813a.c
@@ -21,17 +21,18 @@
 #include "mapinc.h"
 
 static uint16 addrlatch;
-static uint8 datalatch;
+static uint8 datalatch, hw_mode;
 
 static SFORMAT StateRegs[] =
 {
 	{ &addrlatch, 2, "ADRL" },
 	{ &datalatch, 1, "DATL" },
+	{ &hw_mode, 1, "HWMO" },
 	{ 0 }
 };
 
 static void Sync(void) {
-	uint8 prg = (addrlatch & 7) | ((addrlatch & 0x40) >> 3);
+	uint8 prg = (addrlatch & 7);
 	setchr8(datalatch);
 	if(addrlatch & 0x80) {
 		setprg16(0x8000,prg);
@@ -50,15 +51,23 @@ static DECLFW(EH8813AWrite) {
 	Sync();
 }
 
+static DECLFR(EH8813ARead) {
+	if (addrlatch & 0x40)
+		A= (A & 0xFFF0) + hw_mode;
+	return CartBR(A);
+}
+
 static void EH8813APower(void) {
-	addrlatch = datalatch = 0;
+	addrlatch = datalatch = hw_mode = 0;
 	Sync();
-	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetReadHandler(0x8000, 0xFFFF, EH8813ARead);
 	SetWriteHandler(0x8000, 0xFFFF, EH8813AWrite);
 }
 
 static void EH8813AReset(void) {
 	addrlatch = datalatch = 0;
+	hw_mode = (hw_mode + 1) & 0xF;
+	FCEU_printf("Hardware Switch is %01X\n", hw_mode);
 	Sync();
 }