From 912d524c3543ff22421a5616e6e189c15431c1ce Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Sun, 8 Feb 2026 12:29:38 +0100
Subject: [PATCH] Added mapper 608.

---
 src/boards/608.c | 38 ++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 40 insertions(+)
 create mode 100644 src/boards/608.c

diff --git a/src/boards/608.c b/src/boards/608.c
new file mode 100644
index 0000000..f032bfc
--- /dev/null
+++ b/src/boards/608.c
@@ -0,0 +1,38 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2026 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 () {
+	setprg16(0x8000, Latch_address <<3 | Latch_data &0x07);
+	setprg16(0xC000, Latch_address <<3 | 0x07);
+	setchr8(0);
+	setmirror(Latch_address &0x04? MI_V: MI_H);
+}
+
+static void trapLatchWrite (uint16 *newAddress, uint8 *newValue, uint8 romValue) { /* The address bits are only updated when the new A4=0 and A3=1. */
+	if (!(~*newAddress &0x10 && *newAddress &0x08)) *newAddress = Latch_address;
+}
+
+void Mapper608_Init (CartInfo *info) {
+	Latch_init(info, sync, 0x8000, 0xFFFF, trapLatchWrite);
+	info->Reset = Latch_clear;
+}
diff --git a/src/ines.c b/src/ines.c
index eb384e8..c352fe5 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -1025,6 +1025,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "New Star TX5/8IN1",        605, Mapper605_Init         )
 	INES_BOARD( "New Star T4IN1",           606, Mapper606_Init         )
 	INES_BOARD( "4705",                     607, Mapper607_Init         )
+	INES_BOARD( "A-23",                     608, Mapper608_Init         )
 INES_BOARD_END()
 
 static uint32 iNES_get_mapper_id(void)
diff --git a/src/ines.h b/src/ines.h
index e902f0f..a09cdb2 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -494,6 +494,7 @@ void Mapper603_Init(CartInfo *);
 void Mapper605_Init(CartInfo *);
 void Mapper606_Init(CartInfo *);
 void Mapper607_Init(CartInfo *);
+void Mapper608_Init(CartInfo *);
 void FFE_Init(CartInfo *);
 
 #endif