diff --git a/src/ints/int10_char.cpp b/src/ints/int10_char.cpp
index 2865267e..4f799a1f 100644
--- a/src/ints/int10_char.cpp
+++ b/src/ints/int10_char.cpp
@@ -180,7 +180,6 @@ void INT10_SetActivePage(Bit8u page) {
 	mem_address=page*CurMode->plength;
 	/* Write the new page start */
 	real_writew(BIOSMEM_SEG,BIOSMEM_CURRENT_START,mem_address);
-	if (CurMode->mode<8) mem_address>>=1;
 
 	/* Write the new start address in vgahardware */
 	IO_Write(real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS),0x0c);
@@ -278,7 +277,7 @@ void INT10_ReadCharAttr(Bit16u * result,Bit8u page) {
 
 
 static void WriteChar(Bit16u col,Bit16u row,Bit8u page,Bit8u chr,Bit8u attr,bool useattr) {
-	Bit8u * fontdata;
+	PhysPt fontdata;
 	Bitu x,y;
 	switch (CurMode->type) {
 	case M_TEXT16:
@@ -295,14 +294,14 @@ static void WriteChar(Bit16u col,Bit16u row,Bit8u page,Bit8u chr,Bit8u attr,bool
 		return;
 	case M_CGA4:
 	case M_CGA2:
-		if (chr<128) fontdata=Real2Host(RealGetVec(0x43))+chr*8;
+		if (chr<128) fontdata=Real2Phys(RealGetVec(0x43))+chr*8;
 		else {
 			chr-=128;
-			fontdata=Real2Host(RealGetVec(0x1F))+(chr)*8;
+			fontdata=Real2Phys(RealGetVec(0x1F))+(chr)*8;
 		}
 		break;
 	default:
-		fontdata=Real2Host(RealGetVec(0x43))+chr*real_readw(0x40,BIOSMEM_CHAR_HEIGHT);
+		fontdata=Real2Phys(RealGetVec(0x43))+chr*real_readw(0x40,BIOSMEM_CHAR_HEIGHT);
 		break;
 	}
 	x=8*col;
@@ -310,7 +309,7 @@ static void WriteChar(Bit16u col,Bit16u row,Bit8u page,Bit8u chr,Bit8u attr,bool
 	//TODO Check for out of bounds
 	for (Bit8u h=0;h<CurMode->cheight;h++) {
 		Bit8u bitsel=128;
-		Bit8u bitline=*fontdata++;
+		Bit8u bitline=mem_readb(fontdata);
 		Bit16u tx=x;
 		while (bitsel) {
 			if (bitline&bitsel) INT10_PutPixel(tx,y,page,attr);
diff --git a/src/ints/int10_memory.cpp b/src/ints/int10_memory.cpp
index 1370fb0a..af827cec 100644
--- a/src/ints/int10_memory.cpp
+++ b/src/ints/int10_memory.cpp
@@ -72,33 +72,35 @@ void INT10_LoadFont(PhysPt font,bool reload,Bitu count,Bitu offset,Bitu map,Bitu
 
 
 
-
 void INT10_SetupRomMemory(void) {
 /* This should fill up certain structures inside the Video Bios Rom Area */
+	PhysPt rom_base=PhysMake(0xc000,0);
 	Bitu i;
 	int10.rom.used=2;
-	real_writew(0xc000,0,0xaa55);
+	phys_writew(rom_base+0,0xaa55);
 	int10.rom.font_8_first=RealMake(0xC000,int10.rom.used);
 	for (i=0;i<128*8;i++) {
-		real_writeb(0xC000,int10.rom.used++,int10_font_08[i]);
+		phys_writeb(rom_base+int10.rom.used++,int10_font_08[i]);
 	}
 	int10.rom.font_8_second=RealMake(0xC000,int10.rom.used);
 	for (i=0;i<128*8;i++) {
-		real_writeb(0xC000,int10.rom.used++,int10_font_08[i+128*8]);
+		phys_writeb(rom_base+int10.rom.used++,int10_font_08[i+128*8]);
 	}
 	int10.rom.font_14=RealMake(0xC000,int10.rom.used);
 	for (i=0;i<256*14;i++) {
-		real_writeb(0xC000,int10.rom.used++,int10_font_14[i]);
+		phys_writeb(rom_base+int10.rom.used++,int10_font_14[i]);
 	}
 	int10.rom.font_16=RealMake(0xC000,int10.rom.used);
 	for (i=0;i<256*16;i++) {
-		real_writeb(0xC000,int10.rom.used++,int10_font_16[i]);
+		phys_writeb(rom_base+int10.rom.used++,int10_font_16[i]);
 	}
 	int10.rom.static_state=RealMake(0xC000,int10.rom.used);
 	for (i=0;i<0x10;i++) {
-		real_writeb(0xC000,int10.rom.used++,static_functionality[i]);
+		phys_writeb(rom_base+int10.rom.used++,static_functionality[i]);
+	}
+	for (i=0;i<128*8;i++) {
+		phys_writeb(PhysMake(0xf000,0xfa6e)+i,int10_font_08[i]);
 	}
-	MEM_BlockWrite(PhysMake(0xf000,0xfa6e),int10_font_08,128*8);
 	RealSetVec(0x1F,int10.rom.font_8_second);
 };
 
diff --git a/src/ints/int10_vesa.cpp b/src/ints/int10_vesa.cpp
index 007441cb..91d7a1ea 100644
--- a/src/ints/int10_vesa.cpp
+++ b/src/ints/int10_vesa.cpp
@@ -281,17 +281,18 @@ void INT10_SetupVESA(void) {
 //TODO Maybe add normal vga modes too, but only seems to complicate things
 	while (ModeList[i].mode!=0xffff) {
 		if (ModeList[i].mode>=0x100){
-			real_writew(0xc000,int10.rom.used,ModeList[i].mode);
+			phys_writew(PhysMake(0xc000,int10.rom.used),ModeList[i].mode);
 			int10.rom.used+=2;
 		}
 		i++;
 	}
-	real_writew(0xc000,int10.rom.used,0xffff);
+	phys_writew(PhysMake(0xc000,int10.rom.used),0xffff);
 	int10.rom.used+=2;
 	int10.rom.oemstring=RealMake(0xc000,int10.rom.used);
 	Bitu len=strlen(oemstring)+1;
-	MEM_BlockWrite(PhysMake(0xc000,int10.rom.used),oemstring,len);
-	int10.rom.used+=len;
+	for (i=0;i<len;i++) {
+		phys_writeb(0xc0000+i+int10.rom.used++,oemstring[i]);
+	}
 	callback.setwindow=CALLBACK_Allocate();
 	CALLBACK_Setup(callback.setwindow,SetWindowPositionHandler,CB_RETF);
 }