Add mapper 470

src/boards/inx007t.c

@@ -0,0 +1,88 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 Cluster
+ *
+ * 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
+ * 
+ * NES 2.0 Mapper 470 denotes the INX_007T_V01 multicart circuit board, 
+ * used for the Retro-Bit re-release of Battletoads and Double Dragon.
+ * It is basically AOROM with an additional outer bank register at $5000-$5FFF
+ * whose data selects the 256 KiB outer bank.
+ *
+ * $5000-$5FFF
+ * 7  bit  0
+ * ---- ----
+ * xxxx xxOO
+ *        ||
+ *        ++- Select outer 256 KB PRG ROM bank for CPU $8000-$FFFF
+ *
+ * $8000-$FFFF
+ * 7  bit  0
+ * ---- ----
+ * xxxM xPPP
+ *    |  |||
+ *    |  +++- Select inner 32 KB PRG ROM bank for CPU $8000-$FFFF
+ *    +------ Select 1 KB VRAM page for all 4 nametables
+ * 
+ */
+
+#include "mapinc.h"
+
+static uint8 latch_out, latch_in;
+
+static void INX_007T_Sync() {
+	setprg32(0x8000, (latch_in & 0b111) | (latch_out << 3));
+	setmirror(MI_0 + ((latch_in >> 4) & 1));
+	setchr8(0);
+}
+
+static void StateRestore(int version) {
+	INX_007T_Sync();
+}
+
+static DECLFW(INX_007T_WriteLow)
+{
+	latch_out = V;
+	INX_007T_Sync();
+}
+
+static DECLFW(INX_007T_WriteHi)
+{
+	latch_in = V;
+	INX_007T_Sync();
+}
+
+static void INX_007T_Power(void) {
+	latch_in = latch_out = 0;
+	INX_007T_Sync();
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x5000,0x5FFF, INX_007T_WriteLow);
+	SetWriteHandler(0x8000, 0xFFFF, INX_007T_WriteHi);
+}
+
+static void INX_007T_Reset(void) {
+	latch_in = latch_out = 0;
+	INX_007T_Sync();
+}
+
+void INX_007T_Init(CartInfo *info) {
+	info->Power = INX_007T_Power;
+	info->Reset = INX_007T_Reset;
+	GameStateRestore = StateRestore;
+	SetupCartMirroring(MI_0, 0, NULL);
+	AddExState(&latch_out, 1, 0, "LATO");
+	AddExState(&latch_in, 1, 0, "LATI");
+}

src/ines.c

@@ -845,6 +845,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "Keybyte Computer",        	466, Mapper466_Init         )
 	INES_BOARD( "47-2",                 	467, Mapper467_Init         )
 	INES_BOARD( "BlazePro CPLD",           	468, Mapper468_Init         )
+	INES_BOARD( "INX_007T_V01",		470, INX_007T_Init          )
 	INES_BOARD( "Yhc-000",                  500, Mapper500_Init         )
 	INES_BOARD( "Yhc-001",                  501, Mapper501_Init         )
 	INES_BOARD( "Yhc-002",                  502, Mapper502_Init         )

src/ines.h

@@ -356,6 +356,7 @@ void Mapper465_Init(CartInfo *);
 void Mapper466_Init(CartInfo *);
 void Mapper467_Init(CartInfo *);
 void Mapper468_Init(CartInfo *);
+void INX_007T_Init(CartInfo* info); /* Mapper 470 */
 void Mapper500_Init(CartInfo *);
 void Mapper501_Init(CartInfo *);
 void Mapper502_Init(CartInfo *);