diff --git a/src/mame/drivers/magicard.c b/src/mame/drivers/magicard.c
index d19b7e0d056..69c51ac90be 100644
--- a/src/mame/drivers/magicard.c
+++ b/src/mame/drivers/magicard.c
@@ -384,7 +384,7 @@ static READ16_HANDLER( scc68070_ext_irqc_r ) { return scc68070_ext_irqc_regs[off
 static WRITE16_HANDLER( scc68070_ext_irqc_w ){ scc68070_ext_irqc_regs[offset] = data; }
 static READ16_HANDLER( scc68070_iic_r )
 {
-	printf("%04x\n",offset*2);
+	//printf("%04x\n",offset*2);
 
 	switch(offset)
 	{
@@ -419,27 +419,36 @@ static WRITE16_HANDLER( scc68070_dma_ch1_w ){ scc68070_dma_ch1_regs[offset] = da
 static READ16_HANDLER( scc68070_dma_ch2_r ) { return scc68070_dma_ch2_regs[offset]; }
 static WRITE16_HANDLER( scc68070_dma_ch2_w ){ scc68070_dma_ch2_regs[offset] = data; }
 static READ16_HANDLER( scc68070_mmu_r ) { return scc68070_mmu_regs[offset]; }
-static WRITE16_HANDLER( scc68070_mmu_w ){ scc68070_mmu_regs[offset] = data; }
+static WRITE16_HANDLER( scc68070_mmu_w )
+{
+	scc68070_mmu_regs[offset] = data;
+
+	switch(offset)
+	{
+		case 0x0000/2:
+			if(data & 0x80) //throw an error if the (unemulated) MMU is enabled
+				fatalerror("SCC68070: MMU enable bit active");
+			break;
+	}
+}
 
 
 static ADDRESS_MAP_START( magicard_mem, ADDRESS_SPACE_PROGRAM, 16 )
 //  ADDRESS_MAP_GLOBAL_MASK(0x1fffff)
-	AM_RANGE(0x00000000, 0x000fffff) AM_MIRROR(0x400000) AM_RAM AM_BASE(&magicram) /*only 0-7ffff accessed in Magic Card*/
-//  AM_RANGE(0x00100000, 0x0017ffff) AM_MIRROR(0x400000) AM_RAM AM_REGION("maincpu", 0)
-	AM_RANGE(0x00180000, 0x001ffbff) AM_MIRROR(0x400000) AM_ROM AM_REGION("maincpu", 0)
+	AM_RANGE(0x00000000, 0x0017ffff) AM_MIRROR(0x7fe00000) AM_RAM AM_BASE(&magicram) /*only 0-7ffff accessed in Magic Card*/
+	AM_RANGE(0x00180000, 0x001ffbff) AM_MIRROR(0x7fe00000) AM_RAM AM_REGION("maincpu", 0)
 	/* 001ffc00-001ffdff System I/O */
-	AM_RANGE(0x001ffc00, 0x001ffc01) AM_MIRROR(0x400000) AM_READ(test_r)
-	AM_RANGE(0x001ffc40, 0x001ffc41) AM_MIRROR(0x400000) AM_READ(test_r)
-	AM_RANGE(0x001ffd00, 0x001ffd05) AM_MIRROR(0x400000) AM_WRITE(paletteram_io_w) //RAMDAC
+	AM_RANGE(0x001ffc00, 0x001ffc01) AM_MIRROR(0x7fe00000) AM_READ(test_r)
+	AM_RANGE(0x001ffc40, 0x001ffc41) AM_MIRROR(0x7fe00000) AM_READ(test_r)
+	AM_RANGE(0x001ffd00, 0x001ffd05) AM_MIRROR(0x7fe00000) AM_WRITE(paletteram_io_w) //RAMDAC
 	/*not the right sound chip,unknown type,it should be an ADPCM with 8 channels.*/
-	AM_RANGE(0x001ffd40, 0x001ffd43) AM_MIRROR(0x400000) AM_DEVWRITE8("ym", ym2413_w, 0x00ff)
-	AM_RANGE(0x001ffd80, 0x001ffd81) AM_MIRROR(0x400000) AM_READ(test_r)
-	AM_RANGE(0x001ffd80, 0x001ffd81) AM_MIRROR(0x400000) AM_WRITENOP //?
-	AM_RANGE(0x001fff80, 0x001fffbf) AM_MIRROR(0x400000) AM_RAM //DRAM I/O, not accessed by this game, CD buffer?
-	AM_RANGE(0x001fffe0, 0x001fffff) AM_MIRROR(0x400000) AM_READWRITE(philips_66470_r,philips_66470_w) AM_BASE(&pcab_vregs) //video registers
-	AM_RANGE(0x00200000, 0x002fffff) AM_MIRROR(0x400000) AM_RAM
-	AM_RANGE(0x80001000, 0x8000100f) AM_READWRITE(scc68070_ext_irqc_r,scc68070_ext_irqc_w) AM_BASE(&scc68070_ext_irqc_regs)
-	AM_RANGE(0x80002000, 0x8000200f) AM_READWRITE(scc68070_iic_r,scc68070_iic_w) AM_BASE(&scc68070_iic_regs)
+	AM_RANGE(0x001ffd40, 0x001ffd43) AM_MIRROR(0x7fe00000) AM_DEVWRITE8("ym", ym2413_w, 0x00ff)
+	AM_RANGE(0x001ffd80, 0x001ffd81) AM_MIRROR(0x7fe00000) AM_READ(test_r)
+	AM_RANGE(0x001ffd80, 0x001ffd81) AM_MIRROR(0x7fe00000) AM_WRITENOP //?
+	AM_RANGE(0x001fff80, 0x001fffbf) AM_MIRROR(0x7fe00000) AM_RAM //DRAM I/O, not accessed by this game, CD buffer?
+	AM_RANGE(0x001fffe0, 0x001fffff) AM_MIRROR(0x7fe00000) AM_READWRITE(philips_66470_r,philips_66470_w) AM_BASE(&pcab_vregs) //video registers
+	AM_RANGE(0x80001000, 0x8000100f) AM_READWRITE(scc68070_ext_irqc_r,scc68070_ext_irqc_w) AM_BASE(&scc68070_ext_irqc_regs) //lir
+	AM_RANGE(0x80002000, 0x8000200f) AM_READWRITE(scc68070_iic_r,scc68070_iic_w) AM_BASE(&scc68070_iic_regs) //i2c
 	AM_RANGE(0x80002010, 0x8000201f) AM_READWRITE(scc68070_uart_r,scc68070_uart_w) AM_BASE(&scc68070_uart_regs)
 	AM_RANGE(0x80002020, 0x8000202f) AM_READWRITE(scc68070_timer_r,scc68070_timer_w) AM_BASE(&scc68070_timer_regs)
 	AM_RANGE(0x80002040, 0x8000204f) AM_READWRITE(scc68070_int_irqc_r,scc68070_int_irqc_w) AM_BASE(&scc68070_int_irqc_regs)
@@ -472,9 +481,10 @@ static MACHINE_RESET( magicard )
 /*Probably there's a mask somewhere if it REALLY uses irqs at all...irq vectors dynamically changes after some time.*/
 static INTERRUPT_GEN( magicard_irq )
 {
-//  if(input_code_pressed(KEYCODE_Z))
-//      cputag_set_input_line(device->machine, "maincpu", 1, HOLD_LINE);
-//  magicram[0x2004/2]^=0xffff;
+	if(input_code_pressed(KEYCODE_Z)) //vblank?
+		cpu_set_input_line_and_vector(device, 1, HOLD_LINE,0xe4/4);
+	if(input_code_pressed(KEYCODE_X)) //uart irq
+		cpu_set_input_line_and_vector(device, 1, HOLD_LINE,0xf0/4);
 }
 
 static MACHINE_DRIVER_START( magicard )