diff --git a/src/boards/272.c b/src/boards/272.c
new file mode 100644
index 0000000..923f544
--- /dev/null
+++ b/src/boards/272.c
@@ -0,0 +1,179 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 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 272 is used for a bootleg implementation of
+ * 悪魔城 Special: ぼくDracula君 (Akumajō Special: Boku Dracula-kun).
+ *
+ * as implemented from
+ * https://forums.nesdev.org/viewtopic.php?f=9&t=15302&start=60#p205862
+ *
+ */
+
+#include "mapinc.h"
+
+static uint8 prg[2];
+static uint8 chr[8];
+static uint8 mirr;
+static uint8 pal_mirr;
+static uint8 last_pa13;
+static uint8 IRQCount;
+static uint8 IRQa;
+
+static SFORMAT StateRegs[] =
+{
+	{ prg, 2, "PRG" },
+	{ chr, 8, "CHR" },
+	{ &mirr, 1, "MIRR" },
+	{ &last_pa13, 1, "PA13" },
+	{ &IRQCount, 1, "CNTR" },
+	{ &pal_mirr, 1, "PALM" },
+	{ &IRQa, 1, "CCLK" },
+	{ 0 }
+};
+
+/* shifts bit from position `bit` into position `pos` of expression `exp` */
+#define shi(exp, bit, pos) \
+	((((exp) & (1 << (bit))) >> (bit)) << (pos))
+
+static uint32 vrc_addr_mix(uint32 A) {
+	/* this game wires A0 to VRC_A0 and A1 to VRC_A1 */
+	return (A & 0xf000) | shi(A, 0, 0) | shi(A, 1, 1);
+}
+
+static void Sync(void) {
+	uint8 i;
+	setprg8(0x8000, prg[0]);
+	setprg8(0xa000, prg[1]);
+	setprg16(0xc000, -1);	
+	for (i = 0; i < 8; ++i)
+		setchr1(0x400 * i, chr[i]);
+	switch (pal_mirr) {
+	case 2: setmirror(MI_0); break;
+	case 3: setmirror(MI_1); break;
+	default: 
+		switch (mirr) {
+		case 0: setmirror(MI_V); break;
+		case 1: setmirror(MI_H); break;
+		}
+	}
+}
+
+static DECLFW(M272Write) {
+	/* writes to VRC chip */
+	switch (vrc_addr_mix(A)) {
+	case 0x8000:
+	case 0x8001:
+	case 0x8002:
+	case 0x8003:
+		prg[0] = V;
+		break;
+	case 0x9000:
+	case 0x9001:
+	case 0x9002:
+	case 0x9003:
+		mirr = V & 1;
+		break;
+	case 0xA000:
+	case 0xA001:
+	case 0xA002:
+	case 0xA003:
+		prg[1] = V;
+		break;
+	case 0xb000: chr[0] = (chr[0] & 0xF0) | (V & 0xF); break;
+	case 0xb001: chr[0] = (chr[0] & 0xF) | ((V & 0xF) << 4); break;
+	case 0xb002: chr[1] = (chr[1] & 0xF0) | (V & 0xF); break;
+	case 0xb003: chr[1] = (chr[1] & 0xF) | ((V & 0xF) << 4); break;
+	case 0xc000: chr[2] = (chr[2] & 0xF0) | (V & 0xF); break;
+	case 0xc001: chr[2] = (chr[2] & 0xF) | ((V & 0xF) << 4); break;
+	case 0xc002: chr[3] = (chr[3] & 0xF0) | (V & 0xF); break;
+	case 0xc003: chr[3] = (chr[3] & 0xF) | ((V & 0xF) << 4); break;
+	case 0xd000: chr[4] = (chr[4] & 0xF0) | (V & 0xF); break;
+	case 0xd001: chr[4] = (chr[4] & 0xF) | ((V & 0xF) << 4); break;
+	case 0xd002: chr[5] = (chr[5] & 0xF0) | (V & 0xF); break;
+	case 0xd003: chr[5] = (chr[5] & 0xF) | ((V & 0xF) << 4); break;
+	case 0xe000: chr[6] = (chr[6] & 0xF0) | (V & 0xF); break;
+	case 0xe001: chr[6] = (chr[6] & 0xF) | ((V & 0xF) << 4); break;
+	case 0xe002: chr[7] = (chr[7] & 0xF0) | (V & 0xF); break;
+	case 0xe003: chr[7] = (chr[7] & 0xF) | ((V & 0xF) << 4); break;
+		
+	default:
+		break;
+	}
+
+	/* writes to PAL chip */
+	switch (A & 0xC00C) {
+	case 0x8004: pal_mirr = V & 3; break;
+	case 0x800c: X6502_IRQBegin(FCEU_IQEXT); break;
+	case 0xc004: X6502_IRQEnd(FCEU_IQEXT); break;
+	case 0xc008: IRQa = 1; break;
+	case 0xc00c: IRQa = 0; IRQCount = 0; X6502_IRQEnd(FCEU_IQEXT); break;
+	}
+
+	Sync();
+}
+
+static void M272Power(void) {
+	prg[0] = prg[1] = 0;
+	chr[0] = chr[1] = chr[2] = chr[3] = 0;
+	chr[4] = chr[5] = chr[6] = chr[7] = 0;
+	mirr = pal_mirr = 0;
+	last_pa13 = 0;
+	IRQCount = 0;
+	IRQa = 0;
+	Sync();
+	SetWriteHandler(0x8000, 0xFFFF, M272Write);
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+}
+
+static void M272Hook(uint32 A) {
+	uint8 pa13 = (A >> 13) & 1;
+	if ((last_pa13 == 1) && (pa13 == 0)) {
+		if (IRQa) {
+			IRQCount++;
+			if (IRQCount == 84) {
+				IRQCount = 0;
+				X6502_IRQBegin(FCEU_IQEXT);
+			}
+		}
+	}
+	last_pa13 = pa13;
+}
+
+static void M272Reset(void) {
+	prg[0] = prg[1] = 0;
+	chr[0] = chr[1] = chr[2] = chr[3] = 0;
+	chr[4] = chr[5] = chr[6] = chr[7] = 0;
+	mirr = pal_mirr = 0;
+	last_pa13 = 0;
+	IRQCount = 0;
+	IRQa = 0;
+	Sync();
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper272_Init(CartInfo *info) {
+	info->Power = M272Power;
+	info->Reset = M272Reset;
+	PPU_hook = M272Hook;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}
diff --git a/src/boards/291.c b/src/boards/291.c
new file mode 100644
index 0000000..da6f7ab
--- /dev/null
+++ b/src/boards/291.c
@@ -0,0 +1,59 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 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.
+ */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static void M291CW(uint32 A, uint8 V) {
+	setchr1(A, V | ((EXPREGS[0] << 2) & 0x100));
+}
+
+static void M291PW(uint32 A, uint8 V) {
+	if (EXPREGS[0] & 0x20)
+		setprg32(0x8000, ((EXPREGS[0] >> 1) & 3) | ((EXPREGS[0] >> 4) & 4));
+	else
+		setprg8(A, (V & 0x0F) |  ((EXPREGS[0] >> 2) & 0x10));
+}
+
+static DECLFW(M291Write) {
+	EXPREGS[0] = V;
+	FixMMC3PRG(MMC3_cmd);
+	FixMMC3CHR(MMC3_cmd);
+}
+
+static void M291Reset(void) {
+	EXPREGS[0] = 0;
+	MMC3RegReset();
+}
+
+static void M291Power(void) {
+	EXPREGS[0] = 0;
+	GenMMC3Power();
+	SetWriteHandler(0x6000, 0x7FFF, M291Write);
+}
+
+void Mapper291_Init(CartInfo *info) {
+	GenMMC3_Init(info, 256, 512, 0, 0);
+	cwrap = M291CW;
+	pwrap = M291PW;
+	info->Power = M291Power;
+	info->Reset = M291Reset;
+	AddExState(EXPREGS, 1, 0, "EXPR");
+}
diff --git a/src/boards/414.c b/src/boards/414.c
new file mode 100644
index 0000000..79ff817
--- /dev/null
+++ b/src/boards/414.c
@@ -0,0 +1,64 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 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
+ */
+
+#include "mapinc.h"
+
+static uint8 latch_data;
+static uint32 latch_addr;
+
+static SFORMAT StateRegs[] =
+{
+	{ &latch_addr, 4, "ADDR" },
+	{ &latch_data, 1, "DATA" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	if (latch_addr & 0x2000) { /* NROM-256 */
+		setprg32(0x8000, latch_addr >> 2);
+	} else { /* NROM-128 */
+		setprg16(0x8000, latch_addr >> 1);
+		setprg16(0xC000, latch_addr >> 1);
+	}
+	setchr8(latch_data);
+	setmirror((latch_data & 1) ^ 1);
+}
+
+static DECLFW(M414Write) {
+	latch_addr = A;
+	latch_data = V & CartBR(A);
+	Sync();
+}
+
+static void M414Power(void) {
+	Sync();
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, M414Write);
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper414_Init(CartInfo *info) {
+	info->Power = M414Power;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}
diff --git a/src/boards/431.c b/src/boards/431.c
new file mode 100644
index 0000000..11a987f
--- /dev/null
+++ b/src/boards/431.c
@@ -0,0 +1,62 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2022 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
+ */
+
+#include "mapinc.h"
+
+static uint8 inner_bank;
+static uint8 outer_bank;
+
+static SFORMAT StateRegs[] =
+{
+	{ &outer_bank, 1, "OUTB" },
+	{ &inner_bank, 1, "INNB" },
+	{ 0 }
+};
+
+static void Sync(void) {
+	setprg16(0x8000, ((outer_bank >> 2) & ~7) | (inner_bank & 7));
+	setprg16(0xC000, ((outer_bank >> 2) & ~7) | 7);
+	setchr8(0);
+	setmirror((outer_bank & 1) ^ 1);
+}
+
+static DECLFW(M431Write) {
+	if (A < 0xC000) outer_bank = V;
+    else inner_bank = V;
+	Sync();
+}
+
+static void M431Power(void) {
+    inner_bank = 0;
+    outer_bank = 0;
+	Sync();
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+	SetWriteHandler(0x8000, 0xFFFF, M431Write);
+}
+
+static void StateRestore(int version) {
+	Sync();
+}
+
+void Mapper431_Init(CartInfo *info) {
+	info->Power = M431Power;
+	GameStateRestore = StateRestore;
+	AddExState(&StateRegs, ~0, 0, 0);
+}
diff --git a/src/boards/addrlatch.c b/src/boards/addrlatch.c
index 9273341..43946bf 100644
--- a/src/boards/addrlatch.c
+++ b/src/boards/addrlatch.c
@@ -704,3 +704,14 @@ void J2282_Init(CartInfo *info)
 {
     Latch_Init(info, J2282Sync, NULL, 0x0000, 0x8000, 0xFFFF, 0);
 }
+
+/* -------------- Mapper 409 ------------------------ */
+static void M409Sync(void) {
+	setprg16(0x8000, latche);
+	setprg16(0xC000, ~0);
+	setchr8(0);
+}
+
+void Mapper409_Init(CartInfo *info) {
+	Latch_Init(info, M409Sync, NULL, 0x0000, 0xC000, 0xCFFF, 0);
+}
diff --git a/src/ines.c b/src/ines.c
index c417a7a..575ac88 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -691,6 +691,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "8-in-1 JY-119",            267, Mapper267_Init         )
 	INES_BOARD( "COOLBOY/MINDKIDS",         268, Mapper268_Init         ) /* Submapper distinguishes between COOLBOY and MINDKIDS */
 	INES_BOARD( "Games Xplosion 121-in-1",  269, Mapper269_Init         )
+	INES_BOARD( "Akumajō Special: Boku Dracula-kun", 272, Mapper272_Init         )
 	INES_BOARD( "80013-B",                  274, BMC80013B_Init         )
 	INES_BOARD( "YY860417C",                281, Mapper281_Init         )
 	INES_BOARD( "860224C",                  282, Mapper282_Init         )
@@ -701,6 +702,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "GKCX1",                    288, Mapper288_Init         )
 	INES_BOARD( "60311C",                   289, BMC60311C_Init         )
 	INES_BOARD( "NTD-03",                   290, BMCNTD03_Init          )
+	INES_BOARD( "Kasheng 2-in-1 ",          291, Mapper291_Init         )
 	INES_BOARD( "DRAGONFIGHTER",            292, UNLBMW8544_Init        )
 	INES_BOARD( "NewStar 12-in-1/7-in-1",   293, Mapper293_Init         )
 	INES_BOARD( "MMC3 BMC PIRATE",          294, Bs5652_Init            ) /* nesdev redirects this as mapper 134 */
@@ -784,8 +786,10 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "831019C J-2282",           402, J2282_Init             )
 	INES_BOARD( "89433",                    403, Mapper403_Init         )
 	INES_BOARD( "JY012005",                 404, Mapper404_Init         )
+	INES_BOARD( "retroUSB DPCMcart",        409, Mapper409_Init         )
 	INES_BOARD( "JY-302",                   410, Mapper410_Init         )
 	INES_BOARD( "A88S-1",                   411, Mapper411_Init         )
+	INES_BOARD( "9999999-in-1",             414, Mapper414_Init         )
 	INES_BOARD( "0353",                     415, Mapper415_Init         )
 	INES_BOARD( "4-in-1/N-32",              416, Mapper416_Init         )
 	INES_BOARD( "",                         417, Mapper417_Init         )
@@ -793,6 +797,7 @@ INES_BOARD_BEGIN()
 	INES_BOARD( "BS-400R/BS-4040",          422, Mapper422_Init         )
 	INES_BOARD( "AB-G1L/WELL-NO-DG450",     428, Mapper428_Init         )
 	INES_BOARD( "LIKO BBG-235-8-1B",        429, Mapper429_Init         )
+	INES_BOARD( "Realtek GN-91B",           431, Mapper431_Init         )
 	INES_BOARD( "Realtec 8090",             432, Mapper432_Init         )
 	INES_BOARD( "NC-20MB",                  433, Mapper433_Init         )
 	INES_BOARD( "S-009",                    434, Mapper434_Init         )
diff --git a/src/ines.h b/src/ines.h
index 90f3fa6..0671d68 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -247,9 +247,11 @@ void Mapper254_Init(CartInfo *);
 void Mapper255_Init(CartInfo *);
 
 void GN45_Init(CartInfo *info); /* m361, m366 */
+void Mapper272_Init(CartInfo *);
 void Mapper281_Init(CartInfo *);
 void Mapper282_Init(CartInfo *);
 void Mapper283_Init(CartInfo *);
+void Mapper291_Init(CartInfo *);
 void Mapper295_Init(CartInfo *);
 
 void Bs5652_Init(CartInfo *);
@@ -294,8 +296,10 @@ void Mapper397_Init(CartInfo *);
 void Mapper401_Init(CartInfo *);
 void Mapper403_Init(CartInfo *);
 void Mapper404_Init(CartInfo *);
+void Mapper409_Init(CartInfo *);
 void Mapper410_Init(CartInfo *);
 void Mapper411_Init(CartInfo *);
+void Mapper414_Init(CartInfo *);
 void Mapper415_Init(CartInfo *);
 void Mapper416_Init(CartInfo *);
 void Mapper417_Init(CartInfo *);
@@ -303,6 +307,7 @@ void Mapper421_Init(CartInfo *);
 void Mapper422_Init(CartInfo *);
 void Mapper428_Init(CartInfo *);
 void Mapper429_Init(CartInfo *);
+void Mapper431_Init(CartInfo *);
 void Mapper432_Init(CartInfo *);
 void Mapper433_Init(CartInfo *);
 void Mapper434_Init(CartInfo *);