diff --git a/src/boards/563.c b/src/boards/563.c
index a67be11..9605464 100644
--- a/src/boards/563.c
+++ b/src/boards/563.c
@@ -36,7 +36,7 @@ static void sync () {
 	VRC24_syncMirror();
 }
 
-DECLFW(Mapper563_writeIRQ) {
+static DECLFW(Mapper563_writeIRQ) {
 	X6502_IRQEnd(FCEU_IQEXT);
 	switch(A &0x1C) {
 		case 0x0C: irqEnabled =0; break;
@@ -49,7 +49,7 @@ static void Mapper563_scanline (void) { /* Actually, a sixteen-stage counter tri
 	if (!(++irqCounter &1) && irqEnabled) X6502_IRQBegin(FCEU_IQEXT);
 }
 
-void Mapper563_power(void) {
+static void Mapper563_power(void) {
 	irqEnabled =irqCounter =0;
 	VRC24_power();
 	SetWriteHandler(0xF000, 0xFFFF, Mapper563_writeIRQ);
diff --git a/src/boards/565.c b/src/boards/565.c
new file mode 100644
index 0000000..76ccfde
--- /dev/null
+++ b/src/boards/565.c
@@ -0,0 +1,80 @@
+/* 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_vrc2and4.h"
+
+static uint8 irqEnabled;
+static uint8 irqCounter;
+static uint8 irqPrescaler;
+static uint8 irqMask;
+
+static SFORMAT stateRegs[] ={
+	{ &irqEnabled, 1, "IRQE" },
+	{ &irqCounter, 1, "CNTL" },
+	{ &irqPrescaler, 1, "IRQP" },
+	{ &irqMask, 1, "IRQC" },
+	{ 0 }
+};
+
+static void sync () {
+	VRC24_syncPRG(0x01F, 0x000);
+	VRC24_syncCHR(0x1FF, 0x000);
+	VRC24_syncMirror();
+}
+
+static DECLFW(writeIRQ) {
+	switch(A &0x0C) {
+		case 0:
+			irqCounter = V;
+			irqPrescaler = 0;
+			X6502_IRQEnd(FCEU_IQEXT);
+			break;
+		case 4:
+			irqEnabled = V;
+			break;
+	}
+}
+
+void FP_FASTAPASS(1) cpuCycle (int a) {
+	while (a--) {
+		if (irqEnabled &1) {
+			irqPrescaler++;
+			if (irqPrescaler == 64 && !++irqCounter) X6502_IRQBegin(FCEU_IQEXT);
+			if (irqPrescaler == 112) irqPrescaler = 0;
+		} else {
+			irqPrescaler = 0;
+			X6502_IRQEnd(FCEU_IQEXT);
+		}
+	}
+}
+
+static void power(void) {
+	irqEnabled = irqCounter = irqPrescaler = irqMask = 0;
+	VRC24_power();
+	SetWriteHandler(0xF000, 0xFFFF, writeIRQ);
+}
+
+void Mapper565_Init (CartInfo *info) {
+	VRC2_init(info, sync, 0x08, 0x04, NULL, NULL, NULL, NULL);
+	AddExState(stateRegs, ~0, 0, 0);
+	info->Power = power;
+	MapIRQHook = cpuCycle;
+}
diff --git a/src/ines.c b/src/ines.c
index d26c3a3..6145274 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -971,6 +971,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "Venus Turbo Game Doctor",  562, Mapper561_562_Init     )
 	INES_BOARD( "J-2020",                   563, Mapper563_Init         )
 	INES_BOARD( "bd23.pcb",                 564, Mapper564_Init         )
+	INES_BOARD( "J-33-C",                   565, Mapper565_Init         )
 	INES_BOARD( "ET-149",                   566, Mapper566_Init         )
 	INES_BOARD( "Top Ten Variety (SF III)", 567, Mapper567_Init         )
 	INES_BOARD( "T-227",                    568, Mapper568_Init         )
diff --git a/src/ines.h b/src/ines.h
index 7eb4527..5af07f2 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -437,6 +437,7 @@ void Mapper559_Init(CartInfo *);
 void Mapper561_562_Init(CartInfo *);
 void Mapper563_Init(CartInfo *);
 void Mapper564_Init(CartInfo *);
+void Mapper565_Init(CartInfo *);
 void Mapper566_Init(CartInfo *);
 void Mapper567_Init(CartInfo *);
 void Mapper568_Init(CartInfo *);