From faa58abe0f384712b305ed05ca93420d5d73e482 Mon Sep 17 00:00:00 2001
From: negativeExponent <negativeExponent@users.noreply.github.com>
Date: Tue, 17 Nov 2020 03:29:24 +0800
Subject: [PATCH] Add mapper 401

---
 src/boards/401.c   | 96 ++++++++++++++++++++++++++++++++++++++++++++++
 src/ines-correct.h |  1 +
 src/ines.c         |  1 +
 src/ines.h         |  1 +
 4 files changed, 99 insertions(+)
 create mode 100644 src/boards/401.c

diff --git a/src/boards/401.c b/src/boards/401.c
new file mode 100644
index 0000000..98c459b
--- /dev/null
+++ b/src/boards/401.c
@@ -0,0 +1,96 @@
+/* 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
+ *
+ * NES 2.0 - Mapper 401 (reference from NewRisingSun)
+ * Super 19-in-1 (VIP19) (crc 0x2F497313)
+ *
+ */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static uint8 dipswitch = 0;
+
+static void M401CW(uint32 A, uint8 V) {
+	uint32 mask = (0xFF >> (~EXPREGS[2] &0xF));
+	uint32 bank  = (EXPREGS[0] | ((EXPREGS[2] << 4) &0xF00));
+	setchr1(A, (V & mask) | bank);
+}
+
+static void M401PW(uint32 A, uint8 V) {
+	if ((dipswitch & 1) && (EXPREGS[1] &0x80)) {
+		/* openbus */
+	} else {
+		uint32 mask = (~EXPREGS[3] & 0x1F);
+		uint32 bank  = (EXPREGS[1] & 0x1F) | (EXPREGS[2] & 0x80) |
+			((dipswitch & 2) ? (EXPREGS[2] & 0x20) : ((EXPREGS[1] >> 1) & 0x20)) |
+			((dipswitch & 4) ? (EXPREGS[2] & 0x40) : ((EXPREGS[1] << 1) & 0x40));
+		setprg8(A, (V & mask) | bank);
+	}
+}
+
+static DECLFR(M401Read) {
+	if ((dipswitch & 1) && (EXPREGS[1] & 0x80))
+		return X.DB;
+	return CartBR(A);
+}
+
+static DECLFW(M401Write) {
+	/* FCEU_printf("Wr A:%04x V:%02x index:%d\n", A, V, EXPREGS[4]); */
+	if (!(EXPREGS[3] & 0x40)) {
+		EXPREGS[EXPREGS[4]] = V;
+		EXPREGS[4] = (EXPREGS[4] + 1) & 3;
+		FixMMC3PRG(MMC3_cmd);
+		FixMMC3CHR(MMC3_cmd);
+	}
+	CartBW(A, V);
+}
+
+static void M401Reset(void) {
+	dipswitch = (dipswitch + 1) & 7;
+	FCEU_printf("dipswitch = %d\n", dipswitch);
+	EXPREGS[0] = 0x00;
+	EXPREGS[1] = 0x00;
+	EXPREGS[2] = 0x0F;
+	EXPREGS[3] = 0x00;
+	EXPREGS[4] = 0x00;
+	MMC3RegReset();
+}
+
+static void M401Power(void) {
+	dipswitch = 7;
+	EXPREGS[0] = 0x00;
+	EXPREGS[1] = 0x00;
+	EXPREGS[2] = 0x0F;
+	EXPREGS[3] = 0x00;
+	EXPREGS[4] = 0x00;
+	GenMMC3Power();
+	SetReadHandler(0x8000, 0xFFFF, M401Read);
+	SetWriteHandler(0x6000, 0x7FFF, M401Write);
+}
+
+void Mapper401_Init(CartInfo *info) {
+	GenMMC3_Init(info, 256, 256, 8, 0);
+	cwrap = M401CW;
+	pwrap = M401PW;
+	info->Power = M401Power;
+	info->Reset = M401Reset;
+	AddExState(EXPREGS, 5, 0, "EXPR");
+	AddExState(dipswitch, 1, 0, "DPSW");
+}
diff --git a/src/ines-correct.h b/src/ines-correct.h
index 870b2b8..4c4185d 100644
--- a/src/ines-correct.h
+++ b/src/ines-correct.h
@@ -667,6 +667,7 @@
 	{ 0xdb2d2d88,  369, DEFAULT, DEFAULT, 0,    0x07, DEFAULT, DEFAULT, NOEXTRA }, /* Super Mario Bros. Party.nes */
 	{ 0x87f83ea2,  380, DEFAULT, DEFAULT, 0, DEFAULT,    0x07, DEFAULT, NOEXTRA }, /* 42 to 80,000 */
 	{ 0xc4b94bd5,  389, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Caltron - 9 in 1 (USA) (Proto) (Unl).nes */
+	{ 0x2F497313,  401, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Super 19-in-1 (VIP19) */
 
 	/* ines mappers that uses unif boards */
 
diff --git a/src/ines.c b/src/ines.c
index b81fafc..892aea6 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -705,6 +705,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "Realtec 8031",             390, Mapper390_Init         )
 	INES_BOARD( "NewStar 12-in-1/7-in-1",   293, Mapper293_Init         )
 	INES_BOARD( "Realtec 8210",             395, Mapper395_Init         )
+	INES_BOARD( "BMC Super 19-in-1 (VIP19)",    401, Mapper401_Init         )
 	INES_BOARD( "A88S-1",                   411, Mapper411_Init         )
 	INES_BOARD( "Brilliant Com Cocoma Pack", 516, Mapper516_Init        )
 	INES_BOARD( "Sachen 3014",              533, Mapper533_Init         )
diff --git a/src/ines.h b/src/ines.h
index 4b2e6e5..b1ce41c 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -269,6 +269,7 @@ void Mapper382_Init(CartInfo *);
 void Mapper389_Init(CartInfo *);
 void Mapper390_Init(CartInfo *);
 void Mapper395_Init(CartInfo *);
+void Mapper401_Init(CartInfo *);
 void Mapper411_Init(CartInfo *);
 void Mapper516_Init(CartInfo *);
 void Mapper533_Init(CartInfo *);