Add mapper 122.

src/boards/122.c

@@ -0,0 +1,56 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2025 NewRisingSun
+ *
+ * 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
+ */
+
+#include "mapinc.h"
+
+static uint8 reg[2];
+
+static void sync () {
+	setprg32(0x8000, 0);
+	setchr4(0x0000, reg[0]);
+	setchr4(0x1000, reg[1]);
+}
+
+static DECLFW (writeReg) {
+	reg[A &1] = V;
+	sync();
+}
+
+static void reset () {
+	reg[0] = reg[1] = 0;
+	sync();
+}
+
+static void power () {
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, writeReg);
+	reset();
+}
+
+static void stateRestore (int version) {
+	sync();
+}
+
+void Mapper122_Init (CartInfo *info) {
+	info->Reset = reset;
+	info->Power = power;
+	GameStateRestore = stateRestore;
+	AddExState(reg, 2, 0, "REGS");
+}

src/ines.c

@@ -575,7 +575,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "NES-TQROM",                119, Mapper119_Init         )
 	INES_BOARD( "FDS TOBIDASE",             120, Mapper120_Init         )
 	INES_BOARD( "MMC3 PIRATE PROT. A",      121, Mapper121_Init         )
-/*    INES_BOARD( "",                            122, Mapper122_Init ) */
+	INES_BOARD( "JY043",                    122, Mapper122_Init         )
 	INES_BOARD( "MMC3 PIRATE H2288",        123, UNLH2288_Init          )
 /*    INES_BOARD( "",                            124, Mapper124_Init ) */
 	INES_BOARD( "FDS LH32",                 125, LH32_Init              )

src/ines.h

@@ -150,6 +150,7 @@ void Mapper117_Init(CartInfo *);
 void Mapper119_Init(CartInfo *);
 void Mapper120_Init(CartInfo *);
 void Mapper121_Init(CartInfo *);
+void Mapper122_Init(CartInfo *);
 void Mapper125_Init(CartInfo *);
 void Mapper126_Init(CartInfo *);
 void Mapper128_Init(CartInfo *);