From fe6c0c45138fccadd3e31fa9ce5ef664719cede8 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Sun, 14 Nov 2021 16:11:24 +0100
Subject: [PATCH] Added support for mapper 383.

---
 src/boards/383.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |   1 +
 src/ines.h       |   1 +
 3 files changed, 110 insertions(+)
 create mode 100644 src/boards/383.c

diff --git a/src/boards/383.c b/src/boards/383.c
new file mode 100644
index 0000000..ade8b07
--- /dev/null
+++ b/src/boards/383.c
@@ -0,0 +1,108 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * 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
+ */
+ 
+/*	晶太 YY840708C PCB
+	Solely used for the "1995 Soccer 6-in-1 足球小将專輯 (JY-014)" multicart.
+	MMC3+PAL16L8 combination, resulting in a bizarre mapper that switches banks in part upon *reads*.
+*/ 
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+#define A15    EXPREGS[0]
+#define A16    EXPREGS[1]
+#define A17A18 EXPREGS[2]
+
+static void M383PRGWrap (uint32 A, uint8 V)
+{
+	switch(A17A18)
+	{
+		case 0x00:
+			/* "Setting 0 provides a round-about means of dividing the first 128 KiB bank into two 32 KiB and one 64 KiB bank." */
+			setprg8(A, V &(A16? 0x07: 0x03) | (A16? 0x00: A15) | A16 | A17A18);
+			break;
+		case 0x30:
+			/* "Setting 3 provides 128 KiB MMC3 banking with the CPU A14 line fed to the MMC3 clone reversed.
+			   This is used for the game Tecmo Cup: Soccer Game (renamed "Tecmo Cup Soccer"),
+			   originally an MMC1 game with the fixed bank at $8000-$BFFF and the switchable bank at $C000-$FFFF,
+			   a configuration that could not be reproduced with an MMC3 alone." */
+			setprg8(A ^0x4000, V &0x0F | A17A18);
+			
+			/* "It is also used for the menu,
+			   which in part executes from PRG-ROM mapped to the CPU $6000-$7FFF address range on the MMC3 clone's fixed banks alone,
+			   as no MMC3 PRG bank register is written to before JMPing to this address range." */
+			if (A ==0xE000) setprg8(A ^0x8000, V &0x0B | A17A18);
+			break;
+		default:
+			/* "Settings 1 and 2 provide normal 128 KiB MMC3 banking." */
+			setprg8(A, V &0x0F | A17A18);
+			break;
+	}
+}
+
+static void M383CHRWrap (uint32 A, uint8 V)
+{
+	setchr1(A, V &0x7F | A17A18 <<3);
+}
+
+static DECLFR(M383Read)
+{
+	if (A17A18 ==0x00)
+	{	/* "PAL PRG A16 is updated with the content of the corresponding MMC3 PRG bank bit by reading from the respective address range,
+		   which in turn will then be applied across the entire ROM address range." */
+		A16 =DRegBuf[0x06 | A >>13 &0x01] &0x08;
+		FixMMC3PRG(MMC3_cmd);
+	}
+	return CartBR(A);
+}
+
+static DECLFW(M383Write)
+{
+	if (A &0x0100)
+	{
+		A15    =A >>11 &0x04;
+		A17A18 =A &0x30;
+		FixMMC3PRG(MMC3_cmd);
+		FixMMC3CHR(MMC3_cmd);		
+	}
+	if (A &0x4000)
+		MMC3_IRQWrite(A, V);
+	else
+		MMC3_CMDWrite(A, V);
+}
+
+static void M383Reset (void) {
+	EXPREGS[0] = 0;
+	EXPREGS[1] = 0;
+	EXPREGS[2] = 0;
+	MMC3RegReset();
+}
+
+static void M383Power (void) {
+	GenMMC3Power();
+	SetReadHandler(0x8000, 0xBFFF, M383Read);
+	SetWriteHandler(0x8000, 0xFFFF, M383Write);
+}
+
+void Mapper383_Init(CartInfo *info) {
+	GenMMC3_Init(info, 128, 128, 8, 0);
+	pwrap = M383PRGWrap;
+	cwrap = M383CHRWrap;
+	info->Power = M383Power;
+	info->Reset = M383Reset;
+	AddExState(EXPREGS, 3, 0, "EXPR");
+}
diff --git a/src/ines.c b/src/ines.c
index f99aea1..4d3b8a7 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -699,6 +699,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "42 to 80,000 (970630C)",   380, Mapper380_Init         )
 	INES_BOARD( "KN-42",                    381, Mapper381_Init         )
 	INES_BOARD( "830928C",                  382, Mapper382_Init         )
+	INES_BOARD( "YY840708C",                383, Mapper383_Init         )
 	INES_BOARD( "Caltron 9-in-1",           389, Mapper389_Init         )
 	INES_BOARD( "Realtec 8031",             390, Mapper390_Init         )
 	INES_BOARD( "NewStar 12-in-1/7-in-1",   293, Mapper293_Init         )
diff --git a/src/ines.h b/src/ines.h
index 3cf415f..1d4278d 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -274,6 +274,7 @@ void Mapper376_Init(CartInfo *);
 void Mapper380_Init(CartInfo *);
 void Mapper381_Init(CartInfo *);
 void Mapper382_Init(CartInfo *);
+void Mapper383_Init(CartInfo *);
 void Mapper386_Init(CartInfo *);
 void Mapper387_Init(CartInfo *);
 void Mapper388_Init(CartInfo *);