From 718047a24185199256b38d5ccdfe78d977602548 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Wed, 27 Jul 2022 13:24:30 +0200
Subject: [PATCH] Add mapper 460

---
 src/boards/460.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 96 insertions(+)
 create mode 100644 src/boards/460.c

diff --git a/src/boards/460.c b/src/boards/460.c
new file mode 100644
index 0000000..7cbd782
--- /dev/null
+++ b/src/boards/460.c
@@ -0,0 +1,94 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 
+ *
+ * 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"
+#include "mmc3.h"
+
+static uint8 *CHRRAM =NULL;
+
+static DECLFR(Mapper460_ReadOB)
+{
+   return X.DB;
+}
+
+static void Mapper460_PRGWrap(uint32 A, uint8 V) {
+	int prgAND =0x0F;
+	int prgOR  =EXPREGS[0] <<4;
+	if (EXPREGS[0] &0x20) {
+		if (~A &0x4000) {
+			setprg8(A,         (EXPREGS[0] &0x10? ~2: ~0) &V &prgAND | prgOR &~prgAND);
+			setprg8(A |0x4000, (EXPREGS[0] &0x10?  2:  0) |V &prgAND | prgOR &~prgAND);
+		}
+	} else
+		setprg8(A, V &prgAND | prgOR &~prgAND);
+	
+	/* Menu selection by selectively connecting reg's D7 to PRG /CE or not */
+	if (EXPREGS[0] &0x80 && EXPREGS[1] &1)
+		SetReadHandler(0x8000, 0xFFFF, Mapper460_ReadOB);
+	else
+		SetReadHandler(0x8000, 0xFFFF, CartBR);
+}
+
+static void Mapper460_CHRWrap(uint32 A, uint8 V) {
+	if (EXPREGS[0] &0x04) {
+		setchr2(0x0000, DRegBuf[0] &0xFE);
+		setchr2(0x0800, DRegBuf[0] |0x01);
+		setchr2(0x1000, DRegBuf[2]);
+		setchr2(0x1800, DRegBuf[5]);
+	} else
+		setchr8r(0x10, 0);
+}
+
+static DECLFW(Mapper460_WriteExtra) {
+	if (A001B &0x80 && ~A001B &0x40) EXPREGS[0] =A &0xFF;
+	FixMMC3PRG(MMC3_cmd);
+	FixMMC3CHR(MMC3_cmd);
+}
+
+static void Mapper460_Reset(void) {
+	EXPREGS[0] =0;
+	EXPREGS[1]++;
+	MMC3RegReset();
+}
+
+static void Mapper460_Power(void) {
+	EXPREGS[0] =0;
+	EXPREGS[1] =0;
+	GenMMC3Power();
+	SetWriteHandler(0x6000, 0x7FFF, Mapper460_WriteExtra);
+}
+
+static void Mapper460_close(void) {
+	if (CHRRAM) FCEU_gfree(CHRRAM);
+	CHRRAM =NULL;
+}
+
+void Mapper460_Init(CartInfo *info) {
+	GenMMC3_Init(info, 128, 512, 0, 0);
+	cwrap = Mapper460_CHRWrap;
+	pwrap = Mapper460_PRGWrap;
+	info->Power = Mapper460_Power;
+	info->Reset = Mapper460_Reset;
+	info->Close = Mapper460_close;
+	AddExState(EXPREGS, 2, 0, "EXPR");
+	
+	CHRRAM =(uint8 *)FCEU_gmalloc(8192);
+	SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);
+	AddExState(CHRRAM, 8192, 0, "CRAM");
+}
diff --git a/src/ines.c b/src/ines.c
index c0100cd..c69eea0 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -821,6 +821,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "DS-9-27",                  452, Mapper452_Init         )
 	INES_BOARD( "K6C3001A",                 456, Mapper456_Init         )
 	INES_BOARD( "8-in-1",                   459, Mapper459_Init         )
+	INES_BOARD( "FC-29-40/K-3101",        	460, Mapper460_Init         )
 	INES_BOARD( "0324",                 	461, Mapper461_Init         )
 	INES_BOARD( "YH810X1",                 	463, Mapper463_Init         )
 	INES_BOARD( "NTDEC 9012",          	464, Mapper464_Init         )
diff --git a/src/ines.h b/src/ines.h
index 61a77be..988851e 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -329,6 +329,7 @@ void Mapper444_Init(CartInfo *);
 void Mapper452_Init(CartInfo *);
 void Mapper456_Init(CartInfo *);
 void Mapper459_Init(CartInfo *);
+void Mapper460_Init(CartInfo *);
 void Mapper461_Init(CartInfo *);
 void Mapper463_Init(CartInfo *);
 void Mapper464_Init(CartInfo *);