diff --git a/Makefile b/Makefile
index a05e1c8..6e95da8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 TARGET:=tme
 MUSASHI_GEN_SRC:=musashi/m68kops.c musashi/m68kopac.c musashi/m68kopdm.c musashi/m68kopnz.c
-OBJ:=$(MUSASHI_GEN_SRC:%.x=%.o) musashi/m68kcpu.o  main.o emu.o disp.o iwm.o via.o rtc.o
+OBJ:=$(MUSASHI_GEN_SRC:%.x=%.o) musashi/m68kcpu.o  main.o emu.o disp.o iwm.o via.o rtc.o ncr.o
 #musashi/m68kdasm.o
 CFLAGS=-Wall -I. -I./musashi -Og -ggdb `sdl2-config --cflags`
 LDFLAGS=`sdl2-config --libs`
diff --git a/config.h b/config.h
index fa9e87c..ccb39b0 100644
--- a/config.h
+++ b/config.h
@@ -1,5 +1,8 @@
 
 
-#define TME_ROMSIZE (64*1024)
+#define TME_ROMSIZE (128*1024)
 
-#define TME_RAMSIZE (128*1024)
\ No newline at end of file
+#define TME_RAMSIZE (512*1024)
+
+#define TME_SCREENBUF (TME_RAMSIZE-0x5900)
+#define TME_SCREENBUF_ALT (TME_RAMSIZE-0xd900)
diff --git a/emu.c b/emu.c
index 695276c..25a2539 100644
--- a/emu.c
+++ b/emu.c
@@ -12,6 +12,7 @@
 #include "iwm.h"
 #include "via.h"
 #include "rtc.h"
+#include "ncr.h"
 
 unsigned char *macRom;
 unsigned char *macRam;
@@ -28,19 +29,20 @@ unsigned int  m68k_read_memory_8(unsigned int address) {
 			ret=macRam[address & (TME_RAMSIZE-1)];
 		}
 	} else if (address >= 0x600000 && address < 0xA00000) {
-		ret=macRam[address & (TME_RAMSIZE-1)];
+		ret=macRam[(address-0x600000) & (TME_RAMSIZE-1)];
 	} else if (address >= 0x400000 && address<0x41FFFF) {
 		int romAdr=address-0x400000;
-		if (romAdr>TME_ROMSIZE) printf("PC %x:Huh? Read from ROM mirror (%x)\n", pc, address);
+		if (romAdr>=TME_ROMSIZE) printf("PC %x:Huh? Read from ROM mirror (%x)\n", pc, address);
 		ret=macRom[romAdr&(TME_ROMSIZE-1)];
-//		rom_remap=0; //HACK
 	} else if (address >= 0xE80000 && address < 0xf00000) {
 		ret=viaRead((address>>9)&0xf);
 	} else if (address >= 0xc00000 && address < 0xe00000) {
 		ret=iwmRead((address>>9)&0xf);
+	} else if (address >= 0x580000 && address < 0x600000) {
+		ret=ncrRead((address>>4)&0x7, (address>>7)&1);
 	} else {
 		printf("PC %x: Read from %x\n", pc, address);
-		ret=0xaa;
+		ret=0xff;
 	}
 //	printf("Rd %x = %x\n", address, ret);
 	return ret;
@@ -48,14 +50,16 @@ unsigned int  m68k_read_memory_8(unsigned int address) {
 
 void m68k_write_memory_8(unsigned int address, unsigned int value) {
 	unsigned int pc=m68k_get_reg(NULL, M68K_REG_PC);
-	if (address < 0x400000) {
+	if (address < 0x400000 && !rom_remap) {
 		macRam[address & (TME_RAMSIZE-1)]=value;
 	} else if (address >= 0x600000 && address < 0xA00000) {
-		macRam[address & (TME_RAMSIZE-1)]=value;
+		macRam[(address-0x600000) & (TME_RAMSIZE-1)]=value;
 	} else if (address >= 0xE80000 && address < 0xf00000) {
 		viaWrite((address>>9)&0xf, value);
 	} else if (address >= 0xc00000 && address < 0xe00000) {
 		iwmWrite((address>>9)&0xf, value);
+	} else if (address >= 0x580000 && address < 0x600000) {
+		ncrWrite((address>>4)&0x7, (address>>7)&1, value);
 	} else {
 		printf("PC %x: Write to %x: %x\n", pc, address, value);
 	}
@@ -82,7 +86,7 @@ void tmeStartEmu(void *rom) {
 	int x, frame=0;
 	macRom=rom;
 	macRam=malloc(TME_RAMSIZE);
-	for (int x=0; x<TME_RAMSIZE; x++) macRam[x]=x;
+	for (int x=0; x<TME_RAMSIZE; x++) macRam[x]=0xaa;
 	rom_remap=1;
 	viaClear(VIA_PORTA, 0x7F);
 	viaSet(VIA_PORTA, 0x80);
@@ -95,7 +99,7 @@ void tmeStartEmu(void *rom) {
 			m68k_execute(GRAN);
 			viaStep(GRAN);
 		}
-		dispDraw(&macRam[video_remap?0x12700:0x1A700]);
+		dispDraw(&macRam[video_remap?TME_SCREENBUF_ALT:TME_SCREENBUF]);
 		frame++;
 		ca1^=1;
 		viaControlWrite(VIA_CA1, ca1);
diff --git a/iwm.c b/iwm.c
index 63438b3..6dfa2d8 100644
--- a/iwm.c
+++ b/iwm.c
@@ -27,7 +27,7 @@ void iwmWrite(unsigned int addr, unsigned int val) {
 	iwmAccess(addr);
 	int reg=iwmLines&(IWM_Q7|IWM_Q6);
 	if (reg==0xC0) iwmModeReg=val;
-	printf("IWM write %x (iwm reg %x) val %x\n", addr, reg, val);
+//	printf("IWM write %x (iwm reg %x) val %x\n", addr, reg, val);
 }
 
 unsigned int iwmRead(unsigned int addr) {
@@ -49,6 +49,6 @@ unsigned int iwmRead(unsigned int addr) {
 		if (iwmLines&IWM_ENABLE) val|=0x20; //enable
 		val|=iwmModeReg&0x1F;
 	}
-	printf("IWM read %x (iwm reg %x) val %x\n", addr, reg, val);
+//	printf("IWM read %x (iwm reg %x) val %x\n", addr, reg, val);
 	return val;
 }
diff --git a/main.c b/main.c
index 0a610d9..a562ff9 100644
--- a/main.c
+++ b/main.c
@@ -10,9 +10,14 @@
 
 
 static void *loadRom(char *file) {
+	int i;
 	char *ret=malloc(TME_ROMSIZE);
 	int f=open(file, O_RDONLY);
-	read(f, ret, TME_ROMSIZE);
+	i=read(f, ret, TME_ROMSIZE);
+	if (i!=TME_ROMSIZE) {
+		perror("reading rom");
+		exit(1);
+	}
 	return ret;
 }
 
diff --git a/ncr.c b/ncr.c
new file mode 100644
index 0000000..d130215
--- /dev/null
+++ b/ncr.c
@@ -0,0 +1,27 @@
+#include <stdint.h>
+#include <stdio.h>
+
+
+static const char* const regNamesR[]={
+	"CURSCSIDATA","INITIATORCMD", "MODE", "TARGETCMD", "CURSCSISTATUS",
+	"BUSANDSTATUS", "INPUTDATA", "RESETPARINT"
+};
+
+static const char* const regNamesW[]={
+	"OUTDATA","INITIATORCMD", "MODE", "TARGETCMD", "SELECTENA",
+	"STARTDMASEND", "STARTDMATARRECV", "STARTDMAINITRECV"
+};
+
+
+unsigned int ncrRead(unsigned int addr, unsigned int dack) {
+	unsigned int ret=0;
+
+	printf("SCSI: read %s val %x (dack %d)\n", regNamesR[addr], ret, dack);
+	return ret;
+}
+
+
+void ncrWrite(unsigned int addr, unsigned int dack, unsigned int val) {
+	
+	printf("SCSI: write %s val %x (dack %d)\n", regNamesW[addr], val, dack);
+}
diff --git a/ncr.h b/ncr.h
new file mode 100644
index 0000000..33a226c
--- /dev/null
+++ b/ncr.h
@@ -0,0 +1,4 @@
+
+
+unsigned int ncrRead(unsigned int addr, unsigned int dack);
+void ncrWrite(unsigned int addr,unsigned int dack, unsigned int val);
diff --git a/via.c b/via.c
index b29aff6..91da3a6 100644
--- a/via.c
+++ b/via.c
@@ -156,7 +156,7 @@ void viaWrite(unsigned int addr, unsigned int val) {
 		viaCheckIrq();
 	} else if (addr==0xa) {
 		//SR
-		printf("6522: Unimplemented: Write %x to SR?\n", val);
+//		printf("6522: Unimplemented: Write %x to SR?\n", val);
 	} else if (addr==0xb) {
 		//ACR
 		via.acr=val;
@@ -225,7 +225,7 @@ unsigned int viaRead(unsigned int addr) {
 		val=via.timer2>>8;
 	} else if (addr==0xa) {
 		//SR
-		printf("6522: Unimplemented: Read from SR?\n");
+//		printf("6522: Unimplemented: Read from SR?\n");
 	} else if (addr==0xb) {
 		//ACR
 		val=via.acr;