Add mapper 410

src/boards/410.c

@@ -0,0 +1,89 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 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
+ */
+
+/* NES 2.0 Mapper 410 is a variant of mapper 45 where the
+ * ASIC's PRG A21/CHR A20 output (set by bit 6 of the third write to $6000)
+ * selects between regularly-banked CHR-ROM (=0) and 8 KiB of unbanked CHR-RAM (=1).
+ * It is used solely for the Super 8-in-1 - 98格鬥天王＋熱血 (JY-302) multicart.
+ */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static uint8 *CHRRAM;
+
+static void M410CW(uint32 A, uint8 V) {
+	if (!(EXPREGS[2] & 0x40)) {
+		uint32 NV = V;
+		NV &= (1 << ((EXPREGS[2] & 7) + 1)) - 1;
+		NV |= EXPREGS[0] | ((EXPREGS[2] & 0xF0) << 4);
+		setchr1(A, NV);
+	} else
+		setchr8r(0x10, 0);
+}
+
+static void M410PW(uint32 A, uint8 V) {
+	uint32 MV = V & ((EXPREGS[3] & 0x3F) ^ 0x3F);
+	MV |= EXPREGS[1];
+	MV |= ((EXPREGS[2] & 0x40) << 2);
+	setprg8(A, MV);
+/*	FCEU_printf("1:%02x 2:%02x 3:%02x A=%04x V=%03x\n",EXPREGS[1],EXPREGS[2],EXPREGS[3],A,MV); */
+}
+
+static DECLFW(M410Write) {
+	EXPREGS[EXPREGS[4]] = V;
+	EXPREGS[4] = (EXPREGS[4] + 1) & 3;
+	FixMMC3PRG(MMC3_cmd);
+	FixMMC3CHR(MMC3_cmd);
+}
+
+static void M410Close(void) {
+	GenMMC3Close();
+	if (CHRRAM)
+		FCEU_free(CHRRAM);
+	CHRRAM = NULL;
+}
+
+static void M410Reset(void) {
+	EXPREGS[0] = EXPREGS[1] = EXPREGS[3] = EXPREGS[4] = 0;
+	EXPREGS[2] = 0x0F;
+	MMC3RegReset();
+}
+
+static void M410Power(void) {
+	GenMMC3Power();
+	EXPREGS[0] = EXPREGS[1] = EXPREGS[3] = EXPREGS[4] = 0;
+	EXPREGS[2] = 0x0F;
+	SetWriteHandler(0x6000, 0x7FFF, M410Write);
+}
+
+void Mapper410_Init(CartInfo *info) {
+	GenMMC3_Init(info, 512, 256, 8, info->battery);
+	cwrap = M410CW;
+	pwrap = M410PW;
+	info->Reset = M410Reset;
+	info->Power = M410Power;
+	info->Close = M410Close;
+	AddExState(EXPREGS, 5, 0, "EXPR");
+
+	CHRRAM = (uint8*)FCEU_gmalloc(8192);
+	SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);
+	AddExState(CHRRAM, 8192, 0, "CRAM");
+}

src/ines.c

@@ -797,6 +797,7 @@ INES_BOARD_BEGIN()
     INES_BOARD( "YY850437C",                396, Mapper396_Init         )
 	INES_BOARD( "YY850439C",                397, Mapper397_Init         )
 	INES_BOARD( "831019C J-2282",           402, J2282_Init             )
+	INES_BOARD( "JY-302",                   410, Mapper410_Init             )
 	INES_BOARD( "SC871115C",                421, Mapper421_Init         )
 	INES_BOARD( "AB-G1L/WELL-NO-DG450",     428, Mapper428_Init         )
 	INES_BOARD( "LIKO BBG-235-8-1B",        429, Mapper429_Init         )

src/ines.h

@@ -290,6 +290,7 @@ void Mapper396_Init(CartInfo *);
 void Mapper397_Init(CartInfo *);
 void Mapper401_Init(CartInfo *);
 void Mapper403_Init(CartInfo *);
+void Mapper410_Init(CartInfo *);
 void Mapper411_Init(CartInfo *);
 void Mapper421_Init(CartInfo *);
 void Mapper422_Init(CartInfo *);