From 67c7a5e4c6d170a6b4df88d254922d5b8c148c73 Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Tue, 9 Sep 2025 11:36:10 +0200
Subject: [PATCH] Add mapper 570.

---
 src/boards/570.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 61 insertions(+)
 create mode 100644 src/boards/570.c

diff --git a/src/boards/570.c b/src/boards/570.c
new file mode 100644
index 0000000..a30a5cc
--- /dev/null
+++ b/src/boards/570.c
@@ -0,0 +1,59 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2020
+ *
+ * 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_vrc2and4.h"
+
+static uint8 reg;
+
+static void sync() {
+	int prgAND = 0x0F;
+	int chrAND = reg &0x03? 0x0FF: 0x1FF;
+	int prgOR  = reg <<4;
+	int chrOR  = !!(reg &0x03)*0x200 | !!(reg &0x02)*0x100;
+	VRC24_syncPRG(prgAND, prgOR &~prgAND);
+	VRC24_syncCHR(chrAND, chrOR &~chrAND);
+	VRC24_syncMirror();
+}
+
+static DECLFW(writeReg) {
+	reg = A &0xFF;
+	sync();
+}
+
+static void reset() {
+	reg = 0;
+	sync();
+}
+
+static void power() {
+	reg = 0;
+	VRC24_power();
+	SetWriteHandler(0x5000, 0x5FFF, writeReg);
+}
+
+void Mapper570_Init(CartInfo *info) {
+	VRC4_init(info, sync, 1, 2, 1, NULL, NULL, NULL, NULL, NULL);
+	info->Power = power;
+	info->Reset = reset;
+	AddExState(&reg, 1, 0, "EXPR");
+}
diff --git a/src/ines.c b/src/ines.c
index 22d0d6c..918d7e8 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -952,6 +952,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "Venus Turbo Game Doctor",  562, Mapper561_562_Init     )
 	INES_BOARD( "J-2020",                   563, Mapper563_Init         )
 	INES_BOARD( "Top Ten Variety (SF III)", 567, Mapper567_Init         )
+	INES_BOARD( "9052",                     570, Mapper570_Init         )
 	INES_BOARD( "F-648",                    572, Mapper572_Init         )
 	INES_BOARD( "5068",                     573, Mapper573_Init         )
 	INES_BOARD( "910610",                   578, Mapper578_Init         )
diff --git a/src/ines.h b/src/ines.h
index b3b0f22..b737c57 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -417,6 +417,7 @@ void Mapper559_Init(CartInfo *);
 void Mapper561_562_Init(CartInfo *);
 void Mapper563_Init(CartInfo *);
 void Mapper567_Init(CartInfo *);
+void Mapper570_Init(CartInfo *);
 void Mapper572_Init(CartInfo *);
 void Mapper573_Init(CartInfo *);
 void Mapper578_Init(CartInfo *);