From 22e559daa81cff44d1f77b6c4de41b28dcbb2ab8 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Fri, 25 Apr 2025 01:57:12 +0200
Subject: [PATCH] Add mapper 476.

---
 src/boards/476.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 99 insertions(+)
 create mode 100644 src/boards/476.c

diff --git a/src/boards/476.c b/src/boards/476.c
new file mode 100644
index 0000000..3eb3bd2
--- /dev/null
+++ b/src/boards/476.c
@@ -0,0 +1,97 @@
+/* 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[4];
+static readfunc read4016 =NULL;
+
+static SFORMAT stateRegs[] ={
+	{ &reg, 2, "REGS" },
+	{ 0 }
+};
+
+static void sync () {
+	if (reg[2] &4)		
+		setprg32(0x8000, reg[0]);
+	else {
+		setprg16(0x8000, reg[0]);
+		setprg16(0xC000, reg[0]);
+	}
+	setchr8(0);
+	setmirror(reg[2] &1? MI_H: MI_V);
+}
+
+static DECLFR(remapButtons) {
+	int i;
+	uint8 result =0x40;
+	GetWriteHandler(0x4016)(0x4016, 1);
+	GetWriteHandler(0x4016)(0x4016, 0);
+	if (A ==0x4016) {
+		for (i =0; i <8; i++) {
+			result <<=1;
+			result |=read4016(0x4016) &1;
+		}
+		result =(result &0x90? 0x01: 0x00) |   // START/A
+		        (result &0x60? 0x02: 0x00)   ; // SELECT/B
+	} else
+	if (A ==0x4017) {
+		for (int i =0; i <8; i++) {
+			result <<=1;
+			result |=read4016(0x4016) &1;
+		}
+		result =(result &0x04? 0x08: 0x00) | // DOWN
+		        (result &0x08? 0x02: 0x00) | // UP
+			(result &0x02? 0x04: 0x00) | // LEFT
+			(result &0x01? 0x10: 0x00)   // RIGHT
+		;
+	}
+	return result;
+}
+
+static DECLFW(writeReg) {
+	reg[A >>8 &3] =V;
+	sync();
+}
+
+static void reset(void) {
+	reg[0] =reg[1] =reg[2] =reg[3] =0;
+	sync();
+}
+
+static void power(void) {
+	if (read4016 !=&remapButtons) read4016 =GetReadHandler(0x4016);
+	reset();
+	SetReadHandler(0x4016, 0x4017, remapButtons);
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x5000, 0x5FFF, writeReg);
+}
+
+static void close(void) {
+	read4016 =NULL;
+}
+
+void Mapper476_Init(CartInfo *info) {
+	AddExState(stateRegs, ~0, 0, 0);
+	info->Power =power;
+	info->Reset =reset;
+	info->Close =close;
+	
+}
diff --git a/src/ines.c b/src/ines.c
index b4b76ff..01c478f 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -897,6 +897,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "KJ01A-18",	          	473, Mapper473_Init         )
 	INES_BOARD( "NTDEC N625231",	       	474, Mapper474_Init         )
 	INES_BOARD( "820215-C-A2",	       	475, Mapper475_Init         )
+	INES_BOARD( "Croaky Karaoke",     	476, Mapper476_Init         )
 	INES_BOARD( "045N",          		481, Mapper481_Init         )
 	INES_BOARD( "ESTIQUE",         		484, Mapper484_Init         )
 	INES_BOARD( "AVE NINA-08",    		487, Mapper487_Init         )
diff --git a/src/ines.h b/src/ines.h
index 8668c0e..492b36f 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -376,6 +376,7 @@ void Mapper472_Init(CartInfo *);
 void Mapper473_Init(CartInfo *);
 void Mapper474_Init(CartInfo *);
 void Mapper475_Init(CartInfo *);
+void Mapper476_Init(CartInfo *);
 void Mapper481_Init(CartInfo *);
 void Mapper484_Init(CartInfo *);
 void Mapper487_Init(CartInfo *);