diff --git a/src/boards/265.c b/src/boards/265.c
new file mode 100644
index 0000000..0665c48
--- /dev/null
+++ b/src/boards/265.c
@@ -0,0 +1,65 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2006 CaH4e3
+ *  Copyright (C) 2023-2024 negativeExponent
+ *
+ * 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
+ */
+
+/* NES 2.0 Mapper 265 - BMC-T-262 */
+
+#include "mapinc.h"
+#include "latch.h"
+
+static void Sync(void) {
+	uint8 bank  = ((latch.addr >> 3) & 0x60) | ((latch.addr >> 2) & 0x18) | (latch.data & 0x07);
+
+	if (latch.addr & 0x80) {
+		if (!bank) {
+			/* NOTE: Unofficial support but Tetris II in 11-in-1 variant
+			works as if its NROM-256 */
+			setprg32(0x8000, bank >> 1);
+		} else {
+			setprg16(0x8000, bank);
+			setprg16(0xC000, bank);
+		}
+	} else {
+		setprg16(0x8000, bank);
+		setprg16(0xC000, bank | 0x07);
+	}
+	setchr8(0);
+	setmirror(((latch.addr >> 1) & 0x01) ^ 0x01);
+}
+
+static DECLFW(M265Write) {
+	if (!(latch.addr & 0x2000)) {
+		latch.addr = A;
+	}
+	latch.data = V;
+	Sync();
+}
+
+static void M265Power(void) {
+	LatchPower();
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, M265Write);
+}
+
+void Mapper265_Init(CartInfo *info) {
+	Latch_Init(info, Sync, NULL, 0, 0);
+	info->Power = M265Power;
+	info->Reset = LatchHardReset;
+}
diff --git a/src/ines.c b/src/ines.c
index 63ce4f7..dd2ea86 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -688,7 +688,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "SHERO",                    262, UNLSHeroes_Init        )
 	INES_BOARD( "KOF97",                    263, UNLKOF97_Init          )
 	INES_BOARD( "YOKO",                     264, UNLYOKO_Init           )
-	INES_BOARD( "T-262",                    265, BMCT262_Init           )
+	INES_BOARD( "T-262",                    265, Mapper265_Init         )
 	INES_BOARD( "CITYFIGHT",                266, UNLCITYFIGHT_Init      )
 	INES_BOARD( "8-in-1 JY-119",            267, Mapper267_Init         )
 	INES_BOARD( "COOLBOY/MINDKIDS",         268, Mapper268_Init         ) /* Submapper distinguishes between COOLBOY and MINDKIDS */
diff --git a/src/ines.h b/src/ines.h
index d688827..6f61a7d 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -257,6 +257,7 @@ void Mapper295_Init(CartInfo *);
 
 void J2282_Init(CartInfo *);
 
+void Mapper265_Init(CartInfo *);
 void Mapper267_Init(CartInfo *);
 void Mapper268_Init(CartInfo *);
 void Mapper269_Init(CartInfo *);
diff --git a/src/unif.c b/src/unif.c
index c2e8390..d566631 100644
--- a/src/unif.c
+++ b/src/unif.c
@@ -539,7 +539,7 @@ static BMAPPING bmap[] = {
 	{ "Supervision16in1",            53, Supervision16_Init,    0 },
 	{ "T-227-1",                NO_INES, BMCT2271_Init,         0 },
 	{ "T-230",                      529, UNLT230_Init,          0 },
-	{ "T-262",                      265, BMCT262_Init,          0 },
+	{ "T-262",                      265, Mapper265_Init,        0 },
 	{ "TBROM",                        4, TBROM_Init,            0 },
 	{ "TC-U01-1.5M",                147, Mapper147_Init,        0 },
 	{ "TEK90",                       90, Mapper90_Init,         0 },