Add mapper 389 (Caltron 9-in-1)

src/boards/389.c

@@ -0,0 +1,84 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2020 negativeExponent
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+/* Mapper 389 - Caltron 9-in-1 multicart */
+
+#include "mapinc.h"
+
+static uint8 regs[3];
+
+static SFORMAT StateRegs[] = {
+   { &regs, 3, "REGS" },
+   { 0 }
+};
+
+static void Sync(void)
+{
+   if (regs[1] & 0x02)
+   {
+      /* UNROM-064 */
+      setprg16(0x8000, (regs[0] >> 2) | ((regs[2] >> 2) & 0x03));
+      setprg16(0xC000, (regs[0] >> 2) | 0x03);
+   }
+   else
+   {
+      /* NROM-256 */
+      setprg32(0x8000, regs[0] >> 3);
+   }
+   setchr8(((regs[1] >> 1) & 0x1C) | (regs[2] & 0x03));
+   setmirror((regs[0] & 0x01) ^ 1);
+}
+
+static DECLFW(M389Write)
+{
+   switch (A & 0xF000)
+   {
+   case 0x8000: regs[0] = (A & 0xFF); Sync(); break;
+   case 0x9000: regs[1] = (A & 0xFF); Sync(); break;
+   default:     regs[2] = (A & 0xFF); Sync(); break;
+   }
+}
+
+static void M389Reset(void)
+{
+   regs[0] = regs[1] = regs[2] = 0;
+   Sync();
+}
+
+static void M389Power(void)
+{
+   regs[0] = regs[1] = regs[2] = 0;
+   Sync();
+   SetReadHandler(0x8000, 0xFFFF, CartBR);
+   SetWriteHandler(0x8000, 0xFFFF, M389Write);
+}
+
+static void StateRestore(int version)
+{
+   Sync();
+}
+
+void Mapper389_Init(CartInfo *info)
+{
+   info->Power = M389Power;
+   info->Reset = M389Reset;
+   GameStateRestore = StateRestore;
+   AddExState(&StateRegs, ~0, 0, 0);
+}