diff --git a/src/boards/158B.c b/src/boards/158B.c
deleted file mode 100644
index 8bd0f5d..0000000
--- a/src/boards/158B.c
+++ /dev/null
@@ -1,71 +0,0 @@
-/* FCE Ultra - NES/Famicom Emulator
- *
- * Copyright notice for this file:
- *  Copyright (C) 2015 CaH4e3
- *
- * 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
- *
- * "Blood Of Jurassic" protected MMC3 based board (GD-98 Cart ID, 158B PCB ID)
- *
- */
-
-#include "mapinc.h"
-#include "mmc3.h"
-
-static uint8 lut[8] = { 0x00, 0x00, 0x00, 0x01, 0x02, 0x04, 0x0F, 0x00 };
-
-static void UNL158BPW(uint32 A, uint8 V) {
-	if (EXPREGS[0] & 0x80) {
-		uint32 bank = EXPREGS[0] & 7; 
-		if(EXPREGS[0] & 0x20) { /* 32Kb mode */
-			setprg32(0x8000, bank >> 1);
-		} else {				/* 16Kb mode */
-			setprg16(0x8000, bank);
-			setprg16(0xC000, bank);
-		}
-	} else {
-		setprg8(A, V & 0xF);
-	}
-}
-
-static DECLFW(UNL158BProtWrite) {
-	EXPREGS[A & 7] = V;
-	switch(A & 7) {
-	case 0:
-		FixMMC3PRG(MMC3_cmd);
-		break;
-	case 7:
-		FCEU_printf("UNK PROT WRITE\n");
-		break;
-	}
-
-}
-
-static DECLFR(UNL158BProtRead) {
-	return X.DB | lut[A & 7];
-}
-
-static void UNL158BPower(void) {
-	GenMMC3Power();
-	SetWriteHandler(0x5000, 0x5FFF, UNL158BProtWrite);
-	SetReadHandler(0x5000, 0x5FFF, UNL158BProtRead);
-}
-
-void UNL158B_Init(CartInfo *info) {
-	GenMMC3_Init(info, 128, 128, 0, 0);
-	pwrap = UNL158BPW;
-	info->Power = UNL158BPower;
-	AddExState(EXPREGS, 8, 0, "EXPR");
-}
diff --git a/src/boards/8237.c b/src/boards/8237.c
index 4c5b869..c72d969 100644
--- a/src/boards/8237.c
+++ b/src/boards/8237.c
@@ -63,6 +63,17 @@ static uint8 adrperm[8][8] =
 	{ 0, 1, 2, 3, 4, 5, 6, 7 },		/* empty */
 };
 
+static uint8 protarray[8][8] = {
+	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* 0 Super Hang-On               */
+	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00 }, /* 1 Monkey King                 */
+	{ 0x00, 0x00, 0x00, 0x00, 0x03, 0x04, 0x00, 0x00 }, /* 2 Super Hang-On/Monkey King   */
+	{ 0x00, 0x00, 0x00, 0x01, 0x00, 0x04, 0x05, 0x00 }, /* 3 Super Hang-On/Monkey King   */
+	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* 4                             */
+	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* 5                             */
+	{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /* 6                             */
+	{ 0x00, 0x00, 0x00, 0x01, 0x02, 0x04, 0x0F, 0x00 }  /* 7 (default) Blood of Jurassic */
+};
+
 static void UNL8237CW(uint32 A, uint8 V) {
 	uint16 outer_bank;
 
@@ -109,6 +120,10 @@ static void UNL8237PW(uint32 A, uint8 V) {
 	}
 }
 
+static DECLFR(UNL8237ProtRead) {
+	return protarray[EXPREGS[3]][A &7] &0x0F | 0x50;
+}
+
 static DECLFW(UNL8237Write) {
 	uint8 dat = V;
 	uint8 adr = adrperm[EXPREGS[2]][((A >> 12) & 6) | (A & 1)];
@@ -125,6 +140,7 @@ static DECLFW(UNL8237ExWrite) {
 	switch (A & 0xF007) {
 	case 0x5000: EXPREGS[0] = V; FixMMC3PRG(MMC3_cmd); FixMMC3CHR(MMC3_cmd); break;
 	case 0x5001: EXPREGS[1] = V; FixMMC3PRG(MMC3_cmd); FixMMC3CHR(MMC3_cmd); break;
+	case 0x5002: EXPREGS[3] = V; break;
 	case 0x5007: EXPREGS[2] = V; break;
 	}
 }
@@ -132,9 +148,18 @@ static DECLFW(UNL8237ExWrite) {
 static void UNL8237Power(void) {
 	EXPREGS[0] = EXPREGS[2] = 0;
 	EXPREGS[1] = 0x0F;
+	EXPREGS[3] = 7;
 	GenMMC3Power();
 	SetWriteHandler(0x8000, 0xFFFF, UNL8237Write);
-	SetWriteHandler(0x5000, 0x7FFF, UNL8237ExWrite);
+	SetReadHandler (0x5000, 0x5FFF, UNL8237ProtRead);
+	SetWriteHandler(0x5000, 0x5FFF, UNL8237ExWrite);
+}
+
+static void UNL8237Reset(void) {
+	EXPREGS[0] = EXPREGS[2] = 0;
+	EXPREGS[1] = 0x0F;
+	EXPREGS[3] = 7;
+	MMC3RegReset();
 }
 
 void UNL8237_Init(CartInfo *info) {
@@ -142,8 +167,8 @@ void UNL8237_Init(CartInfo *info) {
 	cwrap = UNL8237CW;
 	pwrap = UNL8237PW;
 	info->Power = UNL8237Power;
-	AddExState(EXPREGS, 3, 0, "EXPR");
-	AddExState(&submapper, 1, 0, "SUBM");
+	info->Reset = UNL8237Reset;
+	AddExState(EXPREGS, 4, 0, "EXPR");
 	if (info->iNES2)
 		submapper = info->submapper;
 }
diff --git a/src/ines-correct.h b/src/ines-correct.h
index fb80e15..18f251d 100644
--- a/src/ines-correct.h
+++ b/src/ines-correct.h
@@ -913,12 +913,14 @@
 	{ 0x6e149729,  189, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Master Fighter II (Unl) [a1].nes */
 	{ 0x60bfeb0c,   90, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Mortal Kombat 2 (Unl) [!].nes */
 	{ 0x247cc73d,  150, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Poker II (Asia) (Ja) (Unl).nes */
-	{ 0x1f1326d4,  121, DEFAULT,    MI_H, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Super Sonic 5 (1997) (Unl) [!].nes */
-	{ 0x99748230,  215, DEFAULT,    MI_H, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* EarthWorm Jim 2 (SuperGame).nes */
-	{ 0x37876ac7,  215, DEFAULT,    MI_H, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Golden Card 6-in-1 (Unl) [!].nes */
-	{ 0x1a3320a3,  215, DEFAULT,    MI_H, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Mortal Kombat 3 (SuperGame).nes */
-	{ 0x80eb1839,  114, DEFAULT,    MI_H, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Boogerman (Sugar Softec) (Unl) [!].nes */
-	{ 0x071e4ee8,  114, DEFAULT,    MI_H, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* ?? m114,submapper 1 test rom */
+	{ 0x1f1326d4,  121, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Super Sonic 5 (1997) (Unl) [!].nes */
+	{ 0x99748230,  215, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* EarthWorm Jim 2 (SuperGame).nes */
+	{ 0x37876ac7,  215, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Golden Card 6-in-1 (Unl) [!].nes */
+	{ 0x1a3320a3,  215, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Mortal Kombat 3 (SuperGame).nes */
+	{ 0xec70f8d8,  258, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* 1997 留念: 港-京 - Super Hang-On (protected version, CHR doubled) */
+	{ 0x224989d9,  258, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* 1997 留念: 港-京 - Super Hang-On (protected version) */
+	{ 0x80eb1839,  114,       1, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Boogerman (Sugar Softec) (Unl) [!].nes */
+	{ 0x071e4ee8,  114, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* ?? m114,submapper 1 test rom */
 	{ 0xfe3e03a1,  197, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Mortal Kombat III Special (YY-030) (Ch) [!].nes */
 	{ 0x9151d311,  197, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Mortal Kombat III 28 Peoples (NT-328) (Ch) [!].nes */
 	{ 0x272709b9,  237, DEFAULT, DEFAULT, 0, DEFAULT, DEFAULT, DEFAULT, NOEXTRA }, /* Teletubbies Y2K (420-in-1).nes */
diff --git a/src/ines.c b/src/ines.c
index ac867b1..f2af9d5 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -679,7 +679,7 @@ INES_BOARD_BEGIN()
 	/* NES 2.0 MAPPERS */
 
 	INES_BOARD( "OneBus",                   256, UNLOneBus_Init         )
-	INES_BOARD( "158B",                     258, UNL158B_Init           )
+	INES_BOARD( "158B",                     258, UNL8237_Init           )
 	INES_BOARD( "F-15",                     259, BMCF15_Init            )
 	INES_BOARD( "HPxx / HP2018-A",          260, BMCHPxx_Init           )
 	INES_BOARD( "810544-C-A1",              261, BMC810544CA1_Init      )
diff --git a/src/unif.c b/src/unif.c
index 44f065b..7ee2e29 100644
--- a/src/unif.c
+++ b/src/unif.c
@@ -565,7 +565,7 @@ static BMAPPING bmap[] = {
 	{ "YOKO",                       264, UNLYOKO_Init,          0 },
 	{ "COOLBOY",                    268, COOLBOY_Init,          BMCFLAG_256KCHRR },
 	{ "MINDKIDS",                   268, MINDKIDS_Init,         BMCFLAG_256KCHRR },
-	{ "158B",                       258, UNL158B_Init,          0 },
+	{ "158B",                       258, UNL8237_Init,          0 },
 	{ "DRAGONFIGHTER",              292, UNLBMW8544_Init,       0 },
 	{ "EH8813A",                    519, UNLEH8813A_Init,       0 },
 	{ "HP898F",                     319, BMCHP898F_Init,        0 },
diff --git a/src/unif.h b/src/unif.h
index a0826ff..351765c 100644
--- a/src/unif.h
+++ b/src/unif.h
@@ -139,7 +139,6 @@ void UNLYOKO_Init(CartInfo *info);
 void UNROM_Init(CartInfo *info);
 void UNROM512_Init(CartInfo *info);
 void COOLBOY_Init(CartInfo *info);
-void UNL158B_Init(CartInfo *info);
 void UNLBMW8544_Init(CartInfo *info);
 void UNLEH8813A_Init(CartInfo *info);
 void BMCHP898F_Init(CartInfo *info);