From 0b9c4d9fcd9a3e33ef5eb1d3f4fd68d9d271f64a Mon Sep 17 00:00:00 2001
From: NewRisingSun <8vytz1+dhp372pv94ebg@sharklasers.com>
Date: Tue, 9 Sep 2025 13:45:32 +0200
Subject: [PATCH] Add mapper 577.

---
 src/boards/577.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ines.c       |  1 +
 src/ines.h       |  1 +
 3 files changed, 54 insertions(+)
 create mode 100644 src/boards/577.c

diff --git a/src/boards/577.c b/src/boards/577.c
new file mode 100644
index 0000000..b2e0502
--- /dev/null
+++ b/src/boards/577.c
@@ -0,0 +1,52 @@
+/* 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 uint8 pad;
+
+static DECLFR(readOB) {
+	return X.DB;
+}
+
+static void sync () {
+	setprg16(0x8000, Latch_address);
+	setprg16(0xC000, Latch_address);
+	SetReadHandler(0x8000, 0xFFFF, Latch_address &pad &0x30? readOB: CartBR);
+	setchr8(Latch_address >>1);
+}
+
+static void power() {
+	pad = 0;
+	Latch_power();
+}
+
+static void reset() {
+	pad += 0x10;
+	Latch_clear();
+}
+
+void Mapper577_Init (CartInfo *info) {
+	Latch_init(info, sync, 0x8000, 0xFFFF, NULL);
+	info->Power = power;
+	info->Reset = reset;
+	AddExState(&pad, 1, 0, "DIPS");
+}
diff --git a/src/ines.c b/src/ines.c
index bab8f75..2607ef0 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -955,6 +955,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "9052",                     570, Mapper570_Init         )
 	INES_BOARD( "F-648",                    572, Mapper572_Init         )
 	INES_BOARD( "5068",                     573, Mapper573_Init         )
+	INES_BOARD( "KN-29",                    577, Mapper577_Init         )
 	INES_BOARD( "910610",                   578, Mapper578_Init         )
 	INES_BOARD( "T-215",                    579, Mapper579_Init         )
 	INES_BOARD( "ET-156",                   580, Mapper580_Init         )
diff --git a/src/ines.h b/src/ines.h
index ee54f1d..7b899d4 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -420,6 +420,7 @@ void Mapper567_Init(CartInfo *);
 void Mapper570_Init(CartInfo *);
 void Mapper572_Init(CartInfo *);
 void Mapper573_Init(CartInfo *);
+void Mapper577_Init(CartInfo *);
 void Mapper578_Init(CartInfo *);
 void Mapper579_Init(CartInfo *);
 void Mapper580_Init(CartInfo *);