From 4d9dc2c4cb58db18d60c2cac08475e8b5403e200 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Tue, 9 Sep 2025 23:01:50 +0200
Subject: [PATCH] Add mapper 491.

---
 src/boards/491.c | 37 +++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 39 insertions(+)
 create mode 100644 src/boards/491.c

diff --git a/src/boards/491.c b/src/boards/491.c
new file mode 100644
index 0000000..17d2783
--- /dev/null
+++ b/src/boards/491.c
@@ -0,0 +1,37 @@
+/* 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"
+#include "asic_latch.h"
+
+static void sync () {
+	if (Latch_address &0x08) {
+		setprg16(0x8000, Latch_address);
+		setprg16(0xC000, Latch_address);
+	} else
+		setprg32(0x8000, Latch_address >>1);
+	setchr8(Latch_data);
+	setmirror(Latch_address &0x10? MI_H: MI_V);
+}
+
+void Mapper491_Init (CartInfo *info) {
+	Latch_init(info, sync, 0x8000, 0xFFFF, NULL);
+	info->Reset = Latch_clear;
+}
diff --git a/src/ines.c b/src/ines.c
index 7065183..cb49002 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -909,6 +909,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "KS7009",         		486, Mapper486_Init         )
 	INES_BOARD( "AVE NINA-08",    		487, Mapper487_Init         )
 	INES_BOARD( "HC001",    		488, Mapper488_Init         )
+	INES_BOARD( "Sane Ting 5-in-1",         491, Mapper491_Init         )
 	INES_BOARD( "K-3069/12-28",             492, Mapper492_Init         )
 	INES_BOARD( "AVE-NTDEC 30-in-1",        493, Mapper493_Init         )
 	INES_BOARD( "CH512K/OK-103",            494, Mapper494_Init         )
diff --git a/src/ines.h b/src/ines.h
index 7d1c29c..0b330ae 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -389,6 +389,7 @@ void Mapper485_Init(CartInfo *);
 void Mapper486_Init(CartInfo *);
 void Mapper487_Init(CartInfo *);
 void Mapper488_Init(CartInfo *);
+void Mapper491_Init(CartInfo *);
 void Mapper492_Init(CartInfo *);
 void Mapper493_Init(CartInfo *);
 void Mapper494_Init(CartInfo *);