diff --git a/src/boards/218.c b/src/boards/218.c
new file mode 100644
index 0000000..ed906f0
--- /dev/null
+++ b/src/boards/218.c
@@ -0,0 +1,38 @@
+/* FCEUmm - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ * Copyright (C) 2020 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 "../ines.h"
+
+static uint8 mirror;
+static uint8 mask;
+
+static void M218Power(void) {
+	setchr8(0);
+	setprg32(0x8000, 0);
+	SetReadHandler(0x8000, 0xFFFF, CartBR);
+}
+
+void Mapper218_Init(CartInfo* info) {
+	if (head.ROM_type & 0x08)
+		SetupCartMirroring(MI_0 + (head.ROM_type & 0x01), 1,  NULL);
+	SetupCartCHRMapping(0, NTARAM, 2048, 1);
+	info->Power = M218Power;
+}
diff --git a/src/boards/BS110.c b/src/boards/BS110.c
index fc5e31f..18212f8 100644
--- a/src/boards/BS110.c
+++ b/src/boards/BS110.c
@@ -28,7 +28,6 @@ static uint32 WRAMSIZE;
 static uint8 mmc3_reg[8];
 static uint8 exRegs[8];
 static uint8 pointer;
-static uint8 locked;
 static uint8 readDIP;
 static uint16 prgAND;
 static uint16 chrAND;
@@ -57,15 +56,15 @@ static SFORMAT BS110_StateRegs[] =
 
 int BS110GetPRGBank(int bank)
 {
-	if (~bank & 1 && (pointer & 0x40)) bank ^= 2;
-	return bank & 2 ? 0xFE | bank & 1 : mmc3_reg[6 | bank & 1];
+	if ((~bank & 1) && (pointer & 0x40)) bank ^= 2;
+	return (bank & 2) ? 0xFE | (bank & 1) : mmc3_reg[6 | (bank & 1)];
 }
 
 void BS110SyncPRG_GNROM(int A14, int AND, int OR) {
-	setprg8(0x8000, (BS110GetPRGBank(0) &~A14) &AND | OR);
-	setprg8(0xA000, (BS110GetPRGBank(1) &~A14) &AND | OR);
-	setprg8(0xC000, (BS110GetPRGBank(0) | A14) &AND | OR);
-	setprg8(0xE000, (BS110GetPRGBank(1) | A14) &AND | OR);
+	setprg8(0x8000, ((BS110GetPRGBank(0) &~A14) &AND) | OR);
+	setprg8(0xA000, ((BS110GetPRGBank(1) &~A14) &AND) | OR);
+	setprg8(0xC000, ((BS110GetPRGBank(0) | A14) &AND) | OR);
+	setprg8(0xE000, ((BS110GetPRGBank(1) | A14) &AND) | OR);
 }
 
 static void BS110CW(uint32 A, uint8 V) {
@@ -83,18 +82,18 @@ static void BS110PW(uint32 A, uint8 V) {
 		uint8 block = (exRegs[1] & 3) << 4;
 		if ((exRegs[1] >> 3) & 0x01)
 		{
-			setprg8(0x8000, (BS110GetPRGBank(0)) & mask | block);
-			setprg8(0xA000, (BS110GetPRGBank(1)) & mask | block);
-			setprg8(0xC000, (BS110GetPRGBank(0)) & mask | block);
-			setprg8(0xE000, (BS110GetPRGBank(1)) & mask | block);
+			setprg8(0x8000, ((BS110GetPRGBank(0)) & mask) | block);
+			setprg8(0xA000, ((BS110GetPRGBank(1)) & mask) | block);
+			setprg8(0xC000, ((BS110GetPRGBank(0)) & mask) | block);
+			setprg8(0xE000, ((BS110GetPRGBank(1)) & mask) | block);
 		}
 		else
 		{
 
-			setprg8(0x8000, (BS110GetPRGBank(0)) & mask | block);
-			setprg8(0xA000, (BS110GetPRGBank(1)) & mask | block);
-			setprg8(0xC000, (BS110GetPRGBank(0) | 2) & mask | block);
-			setprg8(0xE000, (BS110GetPRGBank(1) | 2) & mask | block);
+			setprg8(0x8000, ((BS110GetPRGBank(0)) & mask) | block);
+			setprg8(0xA000, ((BS110GetPRGBank(1)) & mask) | block);
+			setprg8(0xC000, ((BS110GetPRGBank(0) | 2) & mask) | block);
+			setprg8(0xE000, ((BS110GetPRGBank(1) | 2) & mask) | block);
 		}
 	}
 	else
diff --git a/src/boards/Bs5652.c b/src/boards/Bs5652.c
index 01dff41..a7e9a93 100644
--- a/src/boards/Bs5652.c
+++ b/src/boards/Bs5652.c
@@ -70,15 +70,15 @@ void Bs5652AnalyzeReg()
 
 int Bs5652GetPRGBank(int bank)
 {
-	if (~bank & 1 && (pointer & 0x40)) bank ^= 2;
-	return bank & 2 ? 0xFE | bank & 1 : mmc3_reg[6 | bank & 1];
+	if ((~bank & 1) && (pointer & 0x40)) bank ^= 2;
+	return (bank & 2) ? 0xFE | (bank & 1) : mmc3_reg[6 | (bank & 1)];
 }	
 		
 void Bs5652SyncPRG_GNROM(int A14, int AND, int OR) {
-	setprg8(0x8000, (Bs5652GetPRGBank(0) &~A14) &AND | OR);
-	setprg8(0xA000, (Bs5652GetPRGBank(1) &~A14) &AND | OR);
-	setprg8(0xC000, (Bs5652GetPRGBank(0) | A14) &AND | OR);
-	setprg8(0xE000, (Bs5652GetPRGBank(1) | A14) &AND | OR);
+	setprg8(0x8000, ((Bs5652GetPRGBank(0) &~A14) &AND) | OR);
+	setprg8(0xA000, ((Bs5652GetPRGBank(1) &~A14) &AND) | OR);
+	setprg8(0xC000, ((Bs5652GetPRGBank(0) | A14) &AND) | OR);
+	setprg8(0xE000, ((Bs5652GetPRGBank(1) | A14) &AND) | OR);
 }
 
 static void Bs5652CW(uint32 A, uint8 V) {
diff --git a/src/boards/KG256.c b/src/boards/KG256.c
index a86c6c8..a2ac180 100644
--- a/src/boards/KG256.c
+++ b/src/boards/KG256.c
@@ -40,17 +40,17 @@ static void Sync(void)
 		r = 1;
 	if ((regs[1] >> 4) & 0x01)
 	{
-		setprg16(0x8000, regs[1] & 0x07 | (r) << 3);
-		setprg16(0xC000, regs[1] & 0x07 | (r) << 3);
-		setchr8(regs[0] & 0x07 | (r) << 3);
+		setprg16(0x8000, (regs[1] & 0x07) | (r << 3));
+		setprg16(0xC000, (regs[1] & 0x07) | (r << 3));
+		setchr8((regs[0] & 0x07) | (r << 3));
 	}
 	else
 	{
-		setprg32(0x8000, (regs[1] >> 1) & 0x03 | (r) << 2);
-		setchr8(regs[2] & 0x01 | (r) << 3);
+		setprg32(0x8000, ((regs[1] >> 1) & 0x03) | (r << 2));
+		setchr8((regs[2] & 0x01) | (r << 3));
 	}
 
-	mirr = (((regs[0] >> 4 & 0x1)));
+	mirr = (((regs[0] >> 4) & 0x1));
 
 	if (mirr)
 		setmirror(0);
diff --git a/src/boards/NC7000M.c b/src/boards/NC7000M.c
index df12d5a..9925e65 100644
--- a/src/boards/NC7000M.c
+++ b/src/boards/NC7000M.c
@@ -64,22 +64,22 @@ void NC7000MAnalyzeReg()
 	prgAND = (reg & 0x08 ? 0x0F : 0x1F);
 	chrAND = (reg & 0x40 ? 0x7F : 0xFF);
 	prgOR = (reg << 4 & 0x30);
-	chrOR = (reg << 3 & 0x080 | reg & 0x100);
+	chrOR = ((reg << 3) & 0x080) | (reg & 0x100);
 	nrom = (reg & 0x20);
 	nrom256 = (reg & 0x04);
 }
 
 int NC7000MGetPRGBank(int bank)
 {
-	if (~bank & 1 && (pointer & 0x40)) bank ^= 2;
-	return bank & 2 ? 0xFE | bank & 1 : mmc3_reg[6 | bank & 1];
+	if ((~bank & 1) && (pointer & 0x40)) bank ^= 2;
+	return (bank & 2) ? 0xFE | (bank & 1) : mmc3_reg[6 | (bank & 1)];
 }	
 		
 void NC7000MSyncPRG_GNROM(int A14, int AND, int OR) {
-	setprg8(0x8000, (NC7000MGetPRGBank(0) &~A14) &AND | OR);
-	setprg8(0xA000, (NC7000MGetPRGBank(1) &~A14) &AND | OR);
-	setprg8(0xC000, (NC7000MGetPRGBank(0) | A14) &AND | OR);
-	setprg8(0xE000, (NC7000MGetPRGBank(1) | A14) &AND | OR);
+	setprg8(0x8000, ((NC7000MGetPRGBank(0) &~A14) &AND) | OR);
+	setprg8(0xA000, ((NC7000MGetPRGBank(1) &~A14) &AND) | OR);
+	setprg8(0xC000, ((NC7000MGetPRGBank(0) | A14) &AND) | OR);
+	setprg8(0xE000, ((NC7000MGetPRGBank(1) | A14) &AND) | OR);
 }
 
 static void NC7000MCW(uint32 A, uint8 V) {
@@ -124,7 +124,7 @@ static DECLFW(NC7000MWriteHi) {
 static DECLFW(NC7000MWriteLo) {
 
 	if (!(reg & 0x80)) {
-		reg = V | A & 0x100;
+		reg = V | (A & 0x100);
 		NC7000MAnalyzeReg();
 		FixMMC3PRG(MMC3_cmd);
 		FixMMC3CHR(MMC3_cmd);
@@ -134,10 +134,6 @@ static DECLFW(NC7000MWriteLo) {
 		WRAM[A - 0x6000] = V;
 	}
 }
-static DECLFR(NC7000MReadHi)
-{
-	return CartBR(A);
-}
 
 static void NC7000MPower(void) {
 	mmc3_reg[0] = 0x00; mmc3_reg[1] = 0x02;
diff --git a/src/boards/addrlatch.c b/src/boards/addrlatch.c
index 9aa62ed..41ef1c1 100644
--- a/src/boards/addrlatch.c
+++ b/src/boards/addrlatch.c
@@ -27,6 +27,7 @@ static void (*WSync)(void);
 static readfunc defread;
 static uint8 *WRAM = NULL;
 static uint32 WRAMSIZE;
+static uint32 hasBattery;
 
 static DECLFW(LatchWrite) {
 	latche = A;
@@ -65,6 +66,7 @@ static void Latch_Init(CartInfo *info, void (*proc)(void), readfunc func, uint16
 	addrreg0 = adr0;
 	addrreg1 = adr1;
 	WSync = proc;
+	hasBattery = 0;
 	if (func != NULL)
 		defread = func;
 	else
@@ -77,6 +79,7 @@ static void Latch_Init(CartInfo *info, void (*proc)(void), readfunc func, uint16
 		WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
 		SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
 		if (info->battery) {
+			hasBattery = 1;
 			info->SaveGame[0] = WRAM;
 			info->SaveGameLen[0] = WRAMSIZE;
 		}
@@ -416,6 +419,12 @@ static void M227Sync(void) {
 		}
 	}
 
+	if (!hasBattery && (latche & 0x80) == 0x80)
+		/* CHR-RAM write protect hack, needed for some multicarts */
+		SetupCartCHRMapping(0, CHRptr[0], 0x2000, 0);
+	else
+		SetupCartCHRMapping(0, CHRptr[0], 0x2000, 1);
+
 	setmirror(((latche >> 1) & 1) ^ 1);
 	setchr8(0);
 	setprg8r(0x10, 0x6000, 0);
diff --git a/src/boards/mmc1.c b/src/boards/mmc1.c
index b9698c6..d0ac444 100644
--- a/src/boards/mmc1.c
+++ b/src/boards/mmc1.c
@@ -66,15 +66,6 @@ static DECLFR(MAWRAM) {
 	return(Page[A >> 11][A]);
 }
 
-static void MMC1WRAM(void) {
-	if (WRAMSIZE > 8192) {
-		if (WRAMSIZE > 16384)
-			setprg8r(0x10, 0x6000, (DRegs[1] >> 2) & 3);
-		else
-			setprg8r(0x10, 0x6000, (DRegs[1] >> 3) & 1);
-	}
-}
-
 static void MMC1CHR(void) {
 	if (MMC1WRAMHook8)		/* Use custom wram hook, currently used for M543 */
 		MMC1WRAMHook8();
diff --git a/src/ines.c b/src/ines.c
index 061f5f6..f4423e1 100644
--- a/src/ines.c
+++ b/src/ines.c
@@ -613,7 +613,7 @@ static BMAPPINGLocal bmap[] = {
 	{(uint8_t*)"UNL-8237",				215, UNL8237_Init},
 	{(uint8_t*)"",					216, Mapper216_Init},
 	{(uint8_t*)"",					217, Mapper217_Init},	/* Redefined to a new Discrete BMC mapper */
-/*	{(uint8_t*)"",					218, Mapper218_Init}, */
+	{(uint8_t*)"Magic Floor",		218, Mapper218_Init},
 	{(uint8_t*)"UNLA9746",			219, UNLA9746_Init},
 	{(uint8_t*)"Debug Mapper",		220, UNLKS7057_Init},
 	{(uint8_t*)"UNLN625092",			221, UNLN625092_Init},
@@ -1040,7 +1040,6 @@ static int iNES_Init(int num) {
 					default:  CHRRAMSize = 8 * 1024; break;
 					}
 					iNESCart.CHRRamSize = CHRRAMSize;
-					FCEU_printf(" CHR-RAM:  %3d KiB\n", CHRRAMSize / 1024);
 				}
 				if (CHRRAMSize) { /* TODO: CHR-RAM are sometimes handled in mappers e.g. MMC1 using submapper 1/2/4 and CHR-RAM can be zero here */
 					if ((VROM = (uint8*)malloc(CHRRAMSize)) == NULL) return 0;
@@ -1048,8 +1047,8 @@ static int iNES_Init(int num) {
 					UNIFchrrama = VROM;
 					SetupCartCHRMapping(0, VROM, CHRRAMSize, 1);
 					AddExState(VROM, CHRRAMSize, 0, "CHRR");
+					FCEU_printf(" CHR-RAM:  %3d KiB\n", CHRRAMSize / 1024);
 				}
-				FCEU_printf(" CHR-RAM:  %3d KiB\n", CHRRAMSize / 1024);
 			}
 			if (head.ROM_type & 8)
 				AddExState(ExtraNTARAM, 2048, 0, "EXNR");
diff --git a/src/ines.h b/src/ines.h
index 6f37f89..b43ef34 100644
--- a/src/ines.h
+++ b/src/ines.h
@@ -211,6 +211,7 @@ void Mapper213_Init(CartInfo *);
 void Mapper214_Init(CartInfo *);
 void Mapper216_Init(CartInfo *);
 void Mapper217_Init(CartInfo *);
+void Mapper218_Init(CartInfo *);
 void Mapper220_Init(CartInfo *);
 void Mapper222_Init(CartInfo *);
 void Mapper224_Init(CartInfo *);
diff --git a/src/unif.c b/src/unif.c
index 18acb84..9fdf4e4 100644
--- a/src/unif.c
+++ b/src/unif.c
@@ -312,7 +312,7 @@ static int SetBoardName(FCEUFILE *fp) {
 	FCEU_fread(boardname, 1, uchead.info, fp);
 	boardname[uchead.info] = 0;
 	/* strip whitespaces */
-	boardname = string_trim_whitespace((char const*)boardname);
+	boardname = (uint8*)string_trim_whitespace((char *const)boardname);
 	FCEU_printf(" Board name: %s\n", boardname);
 	sboardname = boardname;
 	if (!memcmp(boardname, "NES-", 4) || !memcmp(boardname, "UNL-", 4) ||