diff --git a/src/boards/582.c b/src/boards/582.c
new file mode 100644
index 0000000..f12ce07
--- /dev/null
+++ b/src/boards/582.c
@@ -0,0 +1,56 @@
+/* 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"
+
+static uint8 reg[4];
+
+static void sync () {
+	setprg16(0x8000, reg[1] <<3 | reg[0] &0x07);
+	setprg16(0xC000, reg[3] <<3 | reg[2] &0x07);
+	setchr8(0);
+}
+
+static DECLFW (writeReg) {
+	reg[A >>13 &3] = V;
+	sync();
+}
+
+static void reset () {
+	reg[0] = reg[1] = reg[2] = reg[3] = 0xFF;
+	sync();
+}
+
+static void power () {
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, writeReg);
+	reset();
+}
+
+static void stateRestore (int version) {
+	sync();
+}
+
+void Mapper582_Init (CartInfo *info) {
+	info->Reset = reset;
+	info->Power = power;
+	GameStateRestore = stateRestore;
+	AddExState(reg, 4, 0, "REGS");
+}
diff --git a/src/ines.c b/src/ines.c
index a371765..d26c3a3 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -987,6 +987,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "T-215",                    579, Mapper579_Init         )
 	INES_BOARD( "ET-156",                   580, Mapper580_Init         )
 	INES_BOARD( "ET-82",                    581, Mapper581_Init         )
+	INES_BOARD( "A9778",                    582, Mapper582_Init         )
 	INES_BOARD( "8203",                     583, Mapper583_Init         )
 	INES_BOARD( "ST-32",                    584, Mapper584_Init         )
 	INES_BOARD( "FE-01-1",                  585, Mapper585_Init         )
diff --git a/src/ines.h b/src/ines.h
index d494b40..7eb4527 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -453,6 +453,7 @@ void Mapper578_Init(CartInfo *);
 void Mapper579_Init(CartInfo *);
 void Mapper580_Init(CartInfo *);
 void Mapper581_Init(CartInfo *);
+void Mapper582_Init(CartInfo *);
 void Mapper583_Init(CartInfo *);
 void Mapper584_Init(CartInfo *);
 void Mapper585_Init(CartInfo *);