diff --git a/src/boards/126.c b/src/boards/126.c
new file mode 100644
index 0000000..0a93910
--- /dev/null
+++ b/src/boards/126.c
@@ -0,0 +1,105 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2019 Libretro Team
+ *
+ * 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
+ */
+
+/* Mapper 126, PowerJoy 84-in-1 Multicart (PJ-008*/
+/* reference from nestopia since not available in nesdev */
+
+#include "mapinc.h"
+#include "mmc3.h"
+
+static uint16 GetExChrExBank() {
+	uint16 bank = (uint16)EXPREGS[0];
+	return ((~bank << 0 & 0x080 & ((uint16)EXPREGS[2])) | (bank << 4 & 0x080 & bank) |
+			(bank << 3 & 0x100) | (bank << 5 & 0x200));
+}
+
+static void UpdateChrBank(void) {
+	uint16 bank = (uint16)EXPREGS[2] & 0x0F;
+	bank |= GetExChrExBank() >> 3;
+	setchr8(bank);
+}
+
+static void M126CW(uint32 A, uint8 V) {
+	if (!(EXPREGS[3] & 0x10)) {
+		uint16 bank = (uint16)V & (((uint16)EXPREGS[0] & 0x80) - 1);
+		bank |= GetExChrExBank();
+		setchr1(A, bank);
+	}
+}
+
+static void M126PW(uint32 A, uint8 V) {
+	uint16 bank = (uint16)V;
+	uint16 preg = (uint16)EXPREGS[0];
+	bank &= ((~preg >> 2) & 0x10) | 0x0F;
+	bank |= ((preg & (0x06 | (preg & 0x40) >> 6)) << 4) | ((preg & 0x10) << 3);
+	if (!(EXPREGS[3] & 0x03))
+		setprg8(A, bank);
+	else if ((A - 0x8000) == ((MMC3_cmd << 8) & 0x4000)) { /* TODO: Clean this */
+		if ((EXPREGS[3] & 0x3) == 0x3)
+			setprg32(0x8000, (bank >> 2));
+		else {
+			setprg16(0x8000, (bank >> 1));
+			setprg16(0xc000, (bank >> 1));
+		}
+	}
+}
+
+static DECLFW(M126Write) {
+	A &= 0x03;
+	if(A == 0x01 || A == 0x02 || ((A == 0x00 || A == 0x03) && !(EXPREGS[3] & 0x80))) {
+		if (EXPREGS[A] != V) {
+			EXPREGS[A] = V;
+			if (EXPREGS[3] & 0x10)
+				UpdateChrBank();
+			else
+				FixMMC3CHR(MMC3_cmd);
+			FixMMC3PRG(MMC3_cmd);
+		}
+	}
+}
+
+void M126StateRestore(int v) {
+	FixMMC3CHR(MMC3_cmd);
+	FixMMC3PRG(MMC3_cmd);
+
+	if (EXPREGS[3] & 0x10)
+		UpdateChrBank();
+}
+
+static void M126Reset(void) {
+	EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
+	MMC3RegReset();
+}
+
+static void M126Power(void) {
+	EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
+	GenMMC3Power();
+	SetWriteHandler(0x6000, 0x7FFF, M126Write);
+}
+
+void Mapper126_Init(CartInfo *info) {
+	GenMMC3_Init(info, 2048, 1023, 0, 0);
+	cwrap = M126CW;
+	pwrap = M126PW;
+	info->Power = M126Power;
+	info->Reset = M126Reset;
+	GameStateRestore = M126StateRestore;
+	AddExState(EXPREGS, 4, 0, "EXPR");
+}
diff --git a/src/boards/224.c b/src/boards/224.c
index 8fd7a19..7c885b7 100644
--- a/src/boards/224.c
+++ b/src/boards/224.c
@@ -28,7 +28,7 @@
 #include "mmc3.h"
 
 static void M224PW(uint32 A, uint8 V) {
-	setprg8(A, V & 0x3f | (EXPREGS[0] << 4) & 0x40);
+	setprg8(A, (V & 0x3f) | ((EXPREGS[0] << 4) & 0x40));
 }
 
 static DECLFW(Mapper224Write) {
diff --git a/src/boards/28.c b/src/boards/28.c
index 2cb95f0..4fdd088 100644
--- a/src/boards/28.c
+++ b/src/boards/28.c
@@ -72,51 +72,51 @@ static void Sync() {
 		break;
 	case 0x10:
 	case 0x14:
-		prglo = outb & ~2 | prg << 1 & 2;
-		prghi = outb & ~2 | prg << 1 & 2 | 1;
+		prglo = (outb & ~2) | (prg << 1 & 2);
+		prghi = (outb & ~2) | (prg << 1 & 2) | 1;
 		break;
 	case 0x20:
 	case 0x24:
-		prglo = outb & ~6 | prg << 1 & 6;
-		prghi = outb & ~6 | prg << 1 & 6 | 1;
+		prglo = (outb & ~6) | (prg << 1 & 6);
+		prghi = (outb & ~6) | (prg << 1 & 6) | 1;
 		break;
 	case 0x30:
 	case 0x34:
-		prglo = outb & ~14 | prg << 1 & 14;
-		prghi = outb & ~14 | prg << 1 & 14 | 1;
+		prglo = (outb & ~14) | (prg << 1 & 14);
+		prghi = (outb & ~14) | (prg << 1 & 14) | 1;
 		break;
 	/* bottom fixed modes */
 	case 0x08:
 		prglo = outb;
-		prghi = outb | prg & 1;
+		prghi = outb | (prg & 1);
 		break;
 	case 0x18:
 		prglo = outb;
-		prghi = outb & ~2 | prg & 3;
+		prghi = (outb & ~2) | (prg & 3);
 		break;
 	case 0x28:
 		prglo = outb;
-		prghi = outb & ~6 | prg & 7;
+		prghi = (outb & ~6) | (prg & 7);
 		break;
 	case 0x38:
 		prglo = outb;
-		prghi = outb & ~14 | prg & 15;
+		prghi = (outb & ~14) | (prg & 15);
 		break;
 	/* top fixed modes */
 	case 0x0c:
-		prglo = outb | prg & 1;
+		prglo = outb | (prg & 1);
 		prghi = outb | 1;
 		break;
 	case 0x1c:
-		prglo = outb & ~2 | prg & 3;
+		prglo = (outb & ~2) | (prg & 3);
 		prghi = outb | 1;
 		break;
 	case 0x2c:
-		prglo = outb & ~6 | prg & 7;
+		prglo = (outb & ~6) | (prg & 7);
 		prghi = outb | 1;
 		break;
 	case 0x3c:
-		prglo = outb & ~14 | prg & 15;
+		prglo = (outb & ~14) | (prg & 15);
 		prghi = outb | 1;
 		break;
 	}
diff --git a/src/boards/KS7032.c b/src/boards/KS7032.c
index 7a8bdfc..41739af 100644
--- a/src/boards/KS7032.c
+++ b/src/boards/KS7032.c
@@ -93,7 +93,7 @@ static DECLFW(UNLKS7032Write) {
 	case 0xF000: {
 		uint8 bank = (cmd - 1);
 		if (bank < 3)
-			reg[bank] = reg[bank] & 0x10 | V & 0x0F;
+			reg[bank] = (reg[bank] & 0x10) | (V & 0x0F);
 		else if (bank < 4)
 			reg[bank] = V;
 		Sync();
@@ -101,7 +101,7 @@ static DECLFW(UNLKS7032Write) {
 		case 0xF000:
 			A &= 3;
 			if (A < 3)
-				reg[bank] = reg[bank] & 0x0F | V & 0x10;
+				reg[bank] = (reg[bank] & 0x0F) | (V & 0x10);
 			Sync();
 			break;
 		case 0xF800:
diff --git a/src/boards/addrlatch.c b/src/boards/addrlatch.c
index ec1a3f1..86a2e72 100644
--- a/src/boards/addrlatch.c
+++ b/src/boards/addrlatch.c
@@ -223,7 +223,7 @@ static void M63Sync(void) {
 }
 
 void Mapper63_Init(CartInfo *info) {
-	Latch_Init(info, M63Sync, NULL, 0x0000, 0x8000, 0xFFFF, 0);
+	Latch_Init(info, M63Sync, M63Read, 0x0000, 0x8000, 0xFFFF, 0);
 }
 
 /*------------------ Map 092 ---------------------------*/
diff --git a/src/ines.c b/src/ines.c
index ee468e6..94f6087 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -515,7 +515,7 @@ static BMAPPINGLocal bmap[] = {
 	{(uint8_t*)"MMC3 PIRATE H2288",	123, UNLH2288_Init},
 /*	{(uint8_t*)"",					124, Mapper124_Init}, */
 	{(uint8_t*)"FDS LH32",			125, LH32_Init},
-/*	{(uint8_t*)"",					126, Mapper126_Init}, */
+	{(uint8_t*)"PowerJoy 84-in-1 PJ-008",		126, Mapper126_Init},
 /*	{(uint8_t*)"",					127, Mapper127_Init}, */
 /*	{(uint8_t*)"",					128, Mapper128_Init}, */
 /*	{(uint8_t*)"",					129, Mapper129_Init}, */
diff --git a/src/ines.h b/src/ines.h
index 3e44574..75a801d 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -139,6 +139,7 @@ void Mapper119_Init(CartInfo *);
 void Mapper120_Init(CartInfo *);
 void Mapper121_Init(CartInfo *);
 void Mapper125_Init(CartInfo *);
+void Mapper126_Init(CartInfo *);
 void Mapper134_Init(CartInfo *);
 void Mapper140_Init(CartInfo *);
 void Mapper144_Init(CartInfo *);