Get rid of a bunch of mostly-trivial NVRAM_HANDLERS in favor of

NVRAM devices.

src/mame/drivers/bbusters.c

@@ -203,6 +203,7 @@ the entire size of the screen.
 #include "sound/2608intf.h"
 #include "sound/2610intf.h"
 #include "includes/bbusters.h"
+#include "machine/nvram.h"
 
 
 /******************************************************************************/
@@ -351,7 +352,7 @@ static ADDRESS_MAP_START( bbusters_map, ADDRESS_SPACE_PROGRAM, 16 )
 	/* AM_RANGE(0x0f0008, 0x0f0009) AM_WRITENOP */
 	AM_RANGE(0x0f0008, 0x0f0009) AM_WRITE(three_gun_output_w)
 	AM_RANGE(0x0f0018, 0x0f0019) AM_WRITE(sound_cpu_w)
-	AM_RANGE(0x0f8000, 0x0f80ff) AM_READ(eprom_r) AM_WRITEONLY AM_BASE_MEMBER(bbusters_state, eprom_data) /* Eeprom */
+	AM_RANGE(0x0f8000, 0x0f80ff) AM_READ(eprom_r) AM_WRITEONLY AM_SHARE("eeprom") /* Eeprom */
 ADDRESS_MAP_END
 
 /*******************************************************************************/
@@ -663,45 +664,6 @@ static const ym2610_interface ym2610_config =
 
 /******************************************************************************/
 
-// default eeprom with reasonable calibration for MAME
-static const unsigned char bbusters_default_eeprom[128] =
-{
-	                                    /*y*/                   /*y*/
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x74, 0x00, 0x00, 0x00, 0xEE, 0x00,
-	0x00, 0x00, 0x00, 0x00,	0x00, 0x00, 0x7E, 0x00, 0x00, 0x00, 0xFE, 0x00,
-	                                    /*y*/                   /*y*/
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x74, 0x00,	0x00, 0x00, 0xEE, 0x00,
-	0x00, 0x00, 0x00, 0x00,	0x00, 0x00, 0x7E, 0x00, 0x00, 0x00, 0xFE, 0x00,
-	                                    /*y*/                   /*y*/
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x74, 0x00,	0x00, 0x00, 0xEE, 0x00,
-	0x00, 0x00, 0x00, 0x00,	0x00, 0x00, 0x7E, 0x00, 0x00, 0x00, 0xFE, 0x00,
-
-
-	0x42, 0x00, 0x45, 0x00, 0x41, 0x00, 0x53, 0x00,	0x54, 0x00, 0x20, 0x00,
-	0x42, 0x00, 0x55, 0x00, 0x53, 0x00, 0x54, 0x00, 0x45, 0x00, 0x52, 0x00,
-	0x53, 0x00, 0x20, 0x00, 0x54, 0x00, 0x4D, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
-	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
-};
-
-
-static NVRAM_HANDLER( bbusters )
-{
-	bbusters_state *state = machine->driver_data<bbusters_state>();
-
-	if( read_or_write )
-	{
-		mame_fwrite (file, state->eprom_data, 0x80);
-	}
-	else
-	{
-		if (file)
-			mame_fread (file, state->eprom_data, 0x80);
-		else
-			memcpy(state->eprom_data, bbusters_default_eeprom, 0x80);
-	}
-}
-
 static VIDEO_EOF( bbuster )
 {
 	address_space *space = cputag_get_address_space(machine, "maincpu", ADDRESS_SPACE_PROGRAM);
@@ -727,7 +689,7 @@ static MACHINE_CONFIG_START( bbusters, bbusters_state )
 	MDRV_CPU_PROGRAM_MAP(sound_map)
 	MDRV_CPU_IO_MAP(sound_portmap)
 
-	MDRV_NVRAM_HANDLER(bbusters)
+	MDRV_NVRAM_ADD_0FILL("eeprom")
 
 	/* video hardware */
 	MDRV_VIDEO_ATTRIBUTES(VIDEO_BUFFERS_SPRITERAM)
@@ -837,6 +799,9 @@ ROM_START( bbusters )
 
 	ROM_REGION( 0x80000, "ymsnd.deltat", 0 )
 	ROM_LOAD( "bb-pcmb.l3",  0x000000, 0x80000, CRC(c8d5dd53) SHA1(0f7e94532cc14852ca12c1b792e5479667af899e) )
+	
+	ROM_REGION( 0x100, "eeprom", 0 )
+	ROM_LOAD( "bbusters-eeprom.bin", 0x00, 0x100, CRC(a52ebd66) SHA1(de04db6f1510700c61bf152799452a80220ae87c) )
 ROM_END
 
 ROM_START( bbustersu )
@@ -882,6 +847,9 @@ ROM_START( bbustersu )
 
 	ROM_REGION( 0x80000, "ymsnd.deltat", 0 )
 	ROM_LOAD( "bb-pcma.l5",  0x000000, 0x80000, CRC(44cd5bfe) SHA1(26a612191a0aa614c090203485aba17c99c763ee) )
+	
+	ROM_REGION( 0x100, "eeprom", 0 )
+	ROM_LOAD( "bbusters-eeprom.bin", 0x00, 0x100, CRC(a52ebd66) SHA1(de04db6f1510700c61bf152799452a80220ae87c) )
 ROM_END
 
 

src/mame/drivers/bfm_sc2.c

@@ -139,6 +139,8 @@ Adder hardware:
 #include "emu.h"
 #include "cpu/m6809/m6809.h"
 
+#include "machine/nvram.h"
+
 #include "video/bfm_adr2.h"
 
 #include "sound/2413intf.h"
@@ -188,7 +190,6 @@ static int sc2gui_update_mmtr;	// bit pattern which mechanical meter needs updat
 // local vars /////////////////////////////////////////////////////////////
 
 static UINT8 *nvram;		// pointer to NVRAM
-static size_t nvram_size;	// size of NVRAM
 static UINT8 key[16];		// security device on gamecard (video games only)
 
 static UINT8 e2ram[1024];	// x24C08 e2ram
@@ -443,19 +444,16 @@ static NVRAM_HANDLER( bfm_sc2 )
 	static const UINT8 init_e2ram[10] = { 1, 4, 10, 20, 0, 1, 1, 4, 10, 20 };
 	if ( read_or_write )
 	{	// writing
-		mame_fwrite(file,nvram,nvram_size);
 		mame_fwrite(file,e2ram,sizeof(e2ram));
 	}
 	else
 	{ // reading
 		if ( file )
 		{
-			mame_fread(file,nvram,nvram_size);
 			mame_fread(file,e2ram,sizeof(e2ram));
 		}
 		else
 		{
-			memset(nvram,0x00,nvram_size);
 			memset(e2ram,0x00,sizeof(e2ram));
 			memcpy(e2ram,init_e2ram,sizeof(init_e2ram));
 		}
@@ -1508,7 +1506,7 @@ static VIDEO_UPDATE( addersc2 )
 
 static ADDRESS_MAP_START( memmap_vid, ADDRESS_SPACE_PROGRAM, 8 )
 
-	AM_RANGE(0x0000, 0x1fff) AM_READWRITE(ram_r, ram_w) AM_BASE(&nvram) AM_SIZE(&nvram_size)// 8k RAM
+	AM_RANGE(0x0000, 0x1fff) AM_READWRITE(ram_r, ram_w) AM_BASE(&nvram) AM_SHARE("nvram") // 8k RAM
 	AM_RANGE(0x2000, 0x2000) AM_READ(vfd_status_hop_r)		// vfd status register
 	AM_RANGE(0x2000, 0x20FF) AM_WRITE(reel12_vid_w)
 	AM_RANGE(0x2100, 0x21FF) AM_WRITE(reel34_w)
@@ -2223,6 +2221,7 @@ static MACHINE_CONFIG_START( scorpion2_vid, driver_device )
 	MDRV_CPU_PROGRAM_MAP(memmap_vid)					// setup scorpion2 board memorymap
 	MDRV_CPU_PERIODIC_INT(timer_irq, 1000)				// generate 1000 IRQ's per second
 
+	MDRV_NVRAM_ADD_0FILL("nvram")
 	MDRV_NVRAM_HANDLER(bfm_sc2)
 	MDRV_DEFAULT_LAYOUT(layout_bfm_sc2)
 
@@ -2748,7 +2747,7 @@ static MACHINE_RESET( dm01_init )
 
 
 static ADDRESS_MAP_START( sc2_memmap, ADDRESS_SPACE_PROGRAM, 8 )
-	AM_RANGE(0x0000, 0x1FFF) AM_READWRITE(ram_r, ram_w) AM_BASE(&nvram) AM_SIZE(&nvram_size)
+	AM_RANGE(0x0000, 0x1FFF) AM_READWRITE(ram_r, ram_w) AM_BASE(&nvram) AM_SHARE("nvram")
 	AM_RANGE(0x2000, 0x2000) AM_READ(vfd_status_r)
 	AM_RANGE(0x2000, 0x20FF) AM_WRITE(reel12_w)
 	AM_RANGE(0x2100, 0x21FF) AM_WRITE(reel34_w)
@@ -2797,7 +2796,7 @@ ADDRESS_MAP_END
 
 /* memory map for scorpion3 board */
 static ADDRESS_MAP_START( sc3_memmap, ADDRESS_SPACE_PROGRAM, 8 )
-	AM_RANGE(0x0000, 0x1FFF) AM_READWRITE(ram_r, ram_w) AM_BASE(&nvram) AM_SIZE(&nvram_size)
+	AM_RANGE(0x0000, 0x1FFF) AM_READWRITE(ram_r, ram_w) AM_BASE(&nvram) AM_SHARE("nvram")
 	AM_RANGE(0x2000, 0x2000) AM_READ(vfd_status_r)
 	AM_RANGE(0x2000, 0x20FF) AM_WRITE(reel12_w)
 	AM_RANGE(0x2100, 0x21FF) AM_WRITE(reel34_w)
@@ -2846,7 +2845,7 @@ ADDRESS_MAP_END
 
 /* memory map for scorpion2 board + dm01 dot matrix board */
 static ADDRESS_MAP_START( memmap_sc2_dm01, ADDRESS_SPACE_PROGRAM, 8 )
-	AM_RANGE(0x0000, 0x1FFF) AM_READWRITE(ram_r, ram_w) AM_BASE(&nvram) AM_SIZE(&nvram_size)
+	AM_RANGE(0x0000, 0x1FFF) AM_READWRITE(ram_r, ram_w) AM_BASE(&nvram) AM_SHARE("nvram")
 	AM_RANGE(0x2000, 0x2000) AM_READ(vfd_status_dm01_r)
 	AM_RANGE(0x2000, 0x20FF) AM_WRITE(reel12_w)
 	AM_RANGE(0x2100, 0x21FF) AM_WRITE(reel34_w)
@@ -3980,6 +3979,7 @@ static MACHINE_CONFIG_START( scorpion2, driver_device )
 	MDRV_SOUND_ADD("ymsnd",YM2413, XTAL_3_579545MHz)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
 
+	MDRV_NVRAM_ADD_0FILL("nvram")
 	MDRV_NVRAM_HANDLER(bfm_sc2)
 
 	/* video hardware */
@@ -4009,6 +4009,7 @@ static MACHINE_CONFIG_START( scorpion2_dm01, driver_device )
 	MDRV_SOUND_ADD("upd",UPD7759, UPD7759_STANDARD_CLOCK)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
 
+	MDRV_NVRAM_ADD_0FILL("nvram")
 	MDRV_NVRAM_HANDLER(bfm_sc2)
 
 	/* video hardware */

src/mame/drivers/drw80pkr.c

@@ -26,6 +26,7 @@
 
 ***********************************************************************************/
 #include "emu.h"
+#include "machine/nvram.h"
 #include "sound/ay8910.h"
 #include "cpu/mcs48/mcs48.h"
 
@@ -42,30 +43,11 @@ static UINT8 pkr_io_ram[0x100];
 static UINT16 video_ram[0x0400];
 static UINT8 color_ram[0x0400];
 
-/********************
+static MACHINE_START( drw80pkr )
-*   NVRAM Handler   *
-********************/
-
-static NVRAM_HANDLER( drw80pkr )
 {
-	if (read_or_write)
+	machine->device<nvram_device>("nvram")->set_base(pkr_io_ram, sizeof(pkr_io_ram));
-	{
-		mame_fwrite(file, pkr_io_ram, DATA_NVRAM_SIZE);
-	}
-	else
-	{
-		if (file)
-		{
-			mame_fread(file, pkr_io_ram, DATA_NVRAM_SIZE);
-		}
-		else
-		{
-			memset(pkr_io_ram, 0, DATA_NVRAM_SIZE);
-		}
-	}
 }
 
-
 /*****************
 * Write Handlers *
 ******************/
@@ -451,6 +433,8 @@ static MACHINE_CONFIG_START( drw80pkr, driver_device )
     MDRV_CPU_IO_MAP(drw80pkr_io_map)
 	MDRV_CPU_VBLANK_INT("screen", irq0_line_hold)
 
+	MDRV_MACHINE_START(drw80pkr)
+
 	// video hardware
 
 	MDRV_SCREEN_ADD("screen", RASTER)
@@ -466,7 +450,8 @@ static MACHINE_CONFIG_START( drw80pkr, driver_device )
 	MDRV_PALETTE_INIT(drw80pkr)
 	MDRV_VIDEO_START(drw80pkr)
 	MDRV_VIDEO_UPDATE(drw80pkr)
-	MDRV_NVRAM_HANDLER(drw80pkr)
+
+	MDRV_NVRAM_ADD_0FILL("nvram")
 
 	// sound hardware
 	MDRV_SPEAKER_STANDARD_MONO("mono")

src/mame/drivers/esripsys.c

@@ -29,6 +29,7 @@
 #include "cpu/m6809/m6809.h"
 #include "cpu/esrip/esrip.h"
 #include "machine/6840ptm.h"
+#include "machine/nvram.h"
 #include "sound/dac.h"
 #include "sound/tms5220.h"
 #include "includes/esripsys.h"
@@ -679,6 +680,8 @@ static DRIVER_INIT( esripsys )
 	fdt_a = auto_alloc_array(machine, UINT8, FDT_RAM_SIZE);
 	fdt_b = auto_alloc_array(machine, UINT8, FDT_RAM_SIZE);
 	cmos_ram = auto_alloc_array(machine, UINT8, CMOS_RAM_SIZE);
+	
+	machine->device<nvram_device>("nvram")->set_base(cmos_ram, CMOS_RAM_SIZE);
 
 	memory_set_bankptr(machine, "bank2", &rom[0x0000]);
 	memory_set_bankptr(machine, "bank3", &rom[0x4000]);
@@ -715,16 +718,6 @@ static DRIVER_INIT( esripsys )
 	state_save_register_global(machine, _fbsel);
 }
 
-static NVRAM_HANDLER( esripsys )
-{
-	if (read_or_write)
-		mame_fwrite(file, cmos_ram, CMOS_RAM_SIZE);
-	else if (file)
-		mame_fread(file, cmos_ram, CMOS_RAM_SIZE);
-	else
-		memset(cmos_ram, 0x00, CMOS_RAM_SIZE);
-}
-
 static const esrip_config rip_config =
 {
 	fdt_rip_r,
@@ -749,7 +742,7 @@ static MACHINE_CONFIG_START( esripsys, driver_device )
 	MDRV_CPU_ADD("sound_cpu", M6809E, XTAL_8MHz)
 	MDRV_CPU_PROGRAM_MAP(sound_cpu_map)
 
-	MDRV_NVRAM_HANDLER(esripsys)
+	MDRV_NVRAM_ADD_0FILL("nvram")
 
 	/* Video hardware */
 	MDRV_SCREEN_ADD("screen", RASTER)

src/mame/drivers/exidy440.c

@@ -217,6 +217,7 @@
 #include "emu.h"
 #include "cpu/m6809/m6809.h"
 #include "includes/exidy440.h"
+#include "machine/nvram.h"
 
 
 /* constants */
@@ -234,28 +235,6 @@ static READ8_HANDLER( showdown_bank0_r );
 
 
 
-/*************************************
- *
- *  EEROM save/load
- *
- *************************************/
-
-static NVRAM_HANDLER( exidy440 )
-{
-	UINT8 *rom = memory_region(machine, "maincpu");
-	if (read_or_write)
-		/* the EEROM lives in the uppermost 8k of the top bank */
-		mame_fwrite(file, &rom[0x10000 + 15 * 0x4000 + 0x2000], 0x2000);
-	else
-	{
-		if (file)
-			mame_fread(file, &rom[0x10000 + 15 * 0x4000 + 0x2000], 0x2000);
-		else
-			memset(&rom[0x10000 + 15 * 0x4000 + 0x2000], 0, 0x2000);
-	}
-}
-
-
 /*************************************
  *
  *  Coin handling
@@ -453,6 +432,13 @@ static WRITE8_HANDLER( topsecex_yscroll_w )
  *
  *************************************/
 
+static MACHINE_START( exidy440 )
+{
+	/* the EEROM lives in the uppermost 8k of the top bank */
+	UINT8 *rom = memory_region(machine, "maincpu");
+	machine->device<nvram_device>("nvram")->set_base(&rom[0x10000 + 15 * 0x4000 + 0x2000], 0x2000);
+}
+
 static MACHINE_RESET( exidy440 )
 {
 	exidy440_bank = 0xff;
@@ -1004,8 +990,9 @@ static MACHINE_CONFIG_START( exidy440, driver_device )
 	MDRV_CPU_PROGRAM_MAP(exidy440_map)
 	MDRV_CPU_VBLANK_INT("screen", exidy440_vblank_interrupt)
 
+	MDRV_MACHINE_START(exidy440)
 	MDRV_MACHINE_RESET(exidy440)
-	MDRV_NVRAM_HANDLER(exidy440)
+	MDRV_NVRAM_ADD_0FILL("nvram")
 
 	/* video hardware */
 	MDRV_FRAGMENT_ADD(exidy440_video)

src/mame/drivers/itech32.c

@@ -351,6 +351,7 @@ Notes:
 #include "cpu/m6809/m6809.h"
 #include "cpu/m68000/m68000.h"
 #include "machine/6522via.h"
+#include "machine/nvram.h"
 #include "machine/ticket.h"
 #include "includes/itech32.h"
 #include "sound/es5506.h"
@@ -379,9 +380,6 @@ static UINT8 sound_int_state;
 
 static UINT16 *main_rom;
 static UINT16 *main_ram;
-static size_t main_ram_size;
-static UINT32 *nvram;
-static size_t nvram_size;
 
 static offs_t itech020_prot_address;
 
@@ -909,39 +907,16 @@ static READ32_DEVICE_HANDLER( timekeeper_32be_r )
  *
  *************************************/
 
-static NVRAM_HANDLER( itech32 )
+void itech32_state::nvram_init(nvram_device &nvram, void *base, size_t length)
 {
-	int i;
+	// if nvram is the main RAM, don't overwrite exception vectors
+	int start = (base == main_ram) ? 0x80 : 0x00;
+	for (int i = start; i < length; i++)
+		((UINT8 *)base)[i] = mame_rand(machine);
 
-	if (read_or_write)
+	// due to accessing uninitialized RAM, we need this hack
-		mame_fwrite(file, main_ram, main_ram_size);
+	if (is_drivedge)
-	else if (file)
+		((UINT32 *)main_ram)[0x2ce4/4] = 0x0000001e;
-		mame_fread(file, main_ram, main_ram_size);
-	else
-	{
-		for (i = 0x80; i < main_ram_size; i++)
-			((UINT8 *)main_ram)[i] = mame_rand(machine);
-
-		/* due to accessing uninitialized RAM, we need this hack */
-		if (is_drivedge)
-			((UINT32 *)main_ram)[0x2ce4/4] = 0x0000001e;
-	}
-}
-
-
-static NVRAM_HANDLER( itech020 )
-{
-	int i;
-
-	if (read_or_write)
-		mame_fwrite(file, nvram, nvram_size);
-	else if (file)
-		mame_fread(file, nvram, nvram_size);
-	else
-	{
-		for (i = 0; i < nvram_size; i++)
-			((UINT8 *)nvram)[i] = mame_rand(machine);
-	}
 }
 
 
@@ -953,7 +928,7 @@ static NVRAM_HANDLER( itech020 )
 
 /*------ Time Killers memory layout ------*/
 static ADDRESS_MAP_START( timekill_map, ADDRESS_SPACE_PROGRAM, 16 )
-	AM_RANGE(0x000000, 0x003fff) AM_RAM AM_BASE(&main_ram) AM_SIZE(&main_ram_size)
+	AM_RANGE(0x000000, 0x003fff) AM_RAM AM_BASE(&main_ram) AM_SHARE("nvram")
 	AM_RANGE(0x040000, 0x040001) AM_READ_PORT("P1")
 	AM_RANGE(0x048000, 0x048001) AM_READ_PORT("P2")
 	AM_RANGE(0x050000, 0x050001) AM_READ_PORT("SYSTEM") AM_WRITE(timekill_intensity_w)
@@ -971,7 +946,7 @@ ADDRESS_MAP_END
 
 /*------ BloodStorm and later games memory layout ------*/
 static ADDRESS_MAP_START( bloodstm_map, ADDRESS_SPACE_PROGRAM, 16 )
-	AM_RANGE(0x000000, 0x00ffff) AM_RAM AM_BASE(&main_ram) AM_SIZE(&main_ram_size)
+	AM_RANGE(0x000000, 0x00ffff) AM_RAM AM_BASE(&main_ram) AM_SHARE("nvram")
 	AM_RANGE(0x080000, 0x080001) AM_READ_PORT("P1") AM_WRITE(int1_ack_w)
 	AM_RANGE(0x100000, 0x100001) AM_READ_PORT("P2")
 	AM_RANGE(0x180000, 0x180001) AM_READ_PORT("P3")
@@ -1036,7 +1011,7 @@ static ADDRESS_MAP_START( drivedge_map, ADDRESS_SPACE_PROGRAM, 32 )
 AM_RANGE(0x000100, 0x0003ff) AM_MIRROR(0x40000) AM_READWRITE(test1_r, test1_w)
 AM_RANGE(0x000c00, 0x007fff) AM_MIRROR(0x40000) AM_READWRITE(test2_r, test2_w)
 #endif
-	AM_RANGE(0x000000, 0x03ffff) AM_MIRROR(0x40000) AM_RAM AM_BASE((UINT32 **)&main_ram) AM_SIZE(&main_ram_size)
+	AM_RANGE(0x000000, 0x03ffff) AM_MIRROR(0x40000) AM_RAM AM_BASE((UINT32 **)&main_ram) AM_SHARE("nvram")
 	AM_RANGE(0x080000, 0x080003) AM_READ_PORT("80000")
 	AM_RANGE(0x082000, 0x082003) AM_READ_PORT("82000")
 	AM_RANGE(0x084000, 0x084003) AM_READWRITE(sound_data32_r, sound_data32_w)
@@ -1073,7 +1048,7 @@ ADDRESS_MAP_END
 
 /*------ 68EC020-based memory layout ------*/
 static ADDRESS_MAP_START( itech020_map, ADDRESS_SPACE_PROGRAM, 32 )
-	AM_RANGE(0x000000, 0x007fff) AM_RAM AM_BASE((UINT32 **)&main_ram) AM_SIZE(&main_ram_size)
+	AM_RANGE(0x000000, 0x007fff) AM_RAM AM_BASE((UINT32 **)&main_ram)
 	AM_RANGE(0x080000, 0x080003) AM_READ_PORT("P1") AM_WRITE(int1_ack32_w)
 	AM_RANGE(0x100000, 0x100003) AM_READ_PORT("P2")
 	AM_RANGE(0x180000, 0x180003) AM_READ_PORT("P3")
@@ -1086,7 +1061,7 @@ static ADDRESS_MAP_START( itech020_map, ADDRESS_SPACE_PROGRAM, 32 )
 	AM_RANGE(0x500000, 0x5000ff) AM_READWRITE(itech020_video_r, itech020_video_w) AM_BASE((UINT32 **)&itech32_video)
 	AM_RANGE(0x578000, 0x57ffff) AM_READNOP				/* touched by protection */
 	AM_RANGE(0x580000, 0x59ffff) AM_RAM_WRITE(itech020_paletteram_w) AM_BASE_GENERIC(paletteram)
-	AM_RANGE(0x600000, 0x603fff) AM_RAM AM_BASE(&nvram) AM_SIZE(&nvram_size)
+	AM_RANGE(0x600000, 0x603fff) AM_RAM AM_SHARE("nvram")
 /* ? */	AM_RANGE(0x61ff00, 0x61ffff) AM_WRITENOP			/* Unknown Writes */
 	AM_RANGE(0x680000, 0x680003) AM_READ(itech020_prot_result_r) AM_WRITENOP
 /* ! */	AM_RANGE(0x680800, 0x68083f) AM_READONLY AM_WRITENOP /* Serial DUART Channel A/B & Top LED sign - To Do! */
@@ -1739,7 +1714,7 @@ static MACHINE_CONFIG_START( timekill, itech32_state )
 	MDRV_CPU_PROGRAM_MAP(sound_map)
 
 	MDRV_MACHINE_RESET(itech32)
-	MDRV_NVRAM_HANDLER(itech32)
+	MDRV_NVRAM_ADD_CUSTOM("nvram", itech32_state, nvram_init)
 
 	MDRV_TICKET_DISPENSER_ADD("ticket", 200, TICKET_MOTOR_ACTIVE_HIGH, TICKET_STATUS_ACTIVE_HIGH)
 
@@ -1810,8 +1785,6 @@ static MACHINE_CONFIG_DERIVED( sftm, bloodstm )
 	MDRV_CPU_PROGRAM_MAP(sound_020_map)
 	MDRV_CPU_VBLANK_INT_HACK(irq1_line_assert,4)
 
-	MDRV_NVRAM_HANDLER(itech020)
-
 	/* via */
 	MDRV_DEVICE_REMOVE("via6522_0")
 MACHINE_CONFIG_END

src/mame/drivers/itech8.c

@@ -501,6 +501,7 @@
 #include "cpu/m6809/m6809.h"
 #include "machine/6821pia.h"
 #include "machine/6522via.h"
+#include "machine/nvram.h"
 #include "machine/ticket.h"
 #include "video/tms34061.h"
 #include "video/tlc34076.h"
@@ -533,9 +534,6 @@ static UINT8 sound_data;
 static UINT8 pia_porta_data;
 static UINT8 pia_portb_data;
 
-static UINT8 *main_ram;
-static size_t main_ram_size;
-
 static const rectangle *visarea;
 
 
@@ -859,27 +857,6 @@ static WRITE16_HANDLER( palette16_w )
 
 
 
-/*************************************
- *
- *  NVRAM read/write
- *
- *************************************/
-
-static NVRAM_HANDLER( itech8 )
-{
-	int i;
-
-	if (read_or_write)
-		mame_fwrite(file, main_ram, main_ram_size);
-	else if (file)
-		mame_fread(file, main_ram, main_ram_size);
-	else
-		for (i = 0; i < main_ram_size; i++)
-			main_ram[i] = mame_rand(machine);
-}
-
-
-
 /*************************************
  *
  *  Main CPU memory handlers
@@ -897,7 +874,7 @@ static ADDRESS_MAP_START( tmslo_map, ADDRESS_SPACE_PROGRAM, 8 )
 	AM_RANGE(0x11a0, 0x11a0) AM_WRITE(itech8_nmi_ack_w)
 	AM_RANGE(0x11c0, 0x11df) AM_READWRITE(itech8_blitter_r, blitter_w)
 	AM_RANGE(0x11e0, 0x11ff) AM_WRITE(itech8_palette_w)
-	AM_RANGE(0x2000, 0x3fff) AM_RAM AM_BASE(&main_ram) AM_SIZE(&main_ram_size)
+	AM_RANGE(0x2000, 0x3fff) AM_RAM AM_SHARE("nvram")
 	AM_RANGE(0x4000, 0xffff) AM_ROMBANK("bank1")
 ADDRESS_MAP_END
 
@@ -913,7 +890,7 @@ static ADDRESS_MAP_START( tmshi_map, ADDRESS_SPACE_PROGRAM, 8 )
 	AM_RANGE(0x01a0, 0x01a0) AM_WRITE(itech8_nmi_ack_w)
 	AM_RANGE(0x01c0, 0x01df) AM_READWRITE(itech8_blitter_r, blitter_w)
 	AM_RANGE(0x01e0, 0x01ff) AM_WRITE(itech8_palette_w)
-	AM_RANGE(0x2000, 0x3fff) AM_RAM AM_BASE(&main_ram) AM_SIZE(&main_ram_size)
+	AM_RANGE(0x2000, 0x3fff) AM_RAM AM_SHARE("nvram")
 	AM_RANGE(0x4000, 0xffff) AM_ROMBANK("bank1")
 ADDRESS_MAP_END
 
@@ -929,7 +906,7 @@ static ADDRESS_MAP_START( gtg2_map, ADDRESS_SPACE_PROGRAM, 8 )
 	AM_RANGE(0x01c0, 0x01c0) AM_WRITE(gtg2_sound_data_w)
 	AM_RANGE(0x01e0, 0x01e0) AM_WRITE(tms34061_latch_w)
 	AM_RANGE(0x1000, 0x1fff) AM_READWRITE(itech8_tms34061_r, itech8_tms34061_w)
-	AM_RANGE(0x2000, 0x3fff) AM_RAM AM_BASE(&main_ram) AM_SIZE(&main_ram_size)
+	AM_RANGE(0x2000, 0x3fff) AM_RAM AM_SHARE("nvram")
 	AM_RANGE(0x4000, 0xffff) AM_ROMBANK("bank1")
 ADDRESS_MAP_END
 
@@ -937,7 +914,7 @@ ADDRESS_MAP_END
 /*------ Ninja Clowns layout ------*/
 static ADDRESS_MAP_START( ninclown_map, ADDRESS_SPACE_PROGRAM, 16 )
 	AM_RANGE(0x000000, 0x00007f) AM_RAM AM_REGION("maincpu", 0)
-	AM_RANGE(0x000080, 0x003fff) AM_RAM AM_BASE((UINT16 **)&main_ram) AM_SIZE(&main_ram_size)
+	AM_RANGE(0x000080, 0x003fff) AM_RAM AM_SHARE("nvram")
 	AM_RANGE(0x004000, 0x07ffff) AM_ROM
 	AM_RANGE(0x100080, 0x100081) AM_WRITE8(sound_data_w, 0xff00)
 	AM_RANGE(0x100100, 0x100101) AM_READ_PORT("40") AM_WRITE(grom_bank16_w) AM_BASE((UINT16 **)&itech8_grom_bank)
@@ -1722,7 +1699,7 @@ static MACHINE_CONFIG_START( itech8_core_lo, driver_device )
 	MDRV_CPU_VBLANK_INT("screen", generate_nmi)
 
 	MDRV_MACHINE_RESET(itech8)
-	MDRV_NVRAM_HANDLER(itech8)
+	MDRV_NVRAM_ADD_RANDOM_FILL("nvram")
 
 	MDRV_TICKET_DISPENSER_ADD("ticket", 200, TICKET_MOTOR_ACTIVE_HIGH, TICKET_STATUS_ACTIVE_LOW)
 

src/mame/drivers/midyunit.c

@@ -169,24 +169,6 @@ static CUSTOM_INPUT( adpcm_irq_state_r )
 
 
 
-/*************************************
- *
- *  CMOS read/write
- *
- *************************************/
-
-static NVRAM_HANDLER( midyunit )
-{
-	if (read_or_write)
-		mame_fwrite(file, midyunit_cmos_ram, 0x8000);
-	else if (file)
-		mame_fread(file, midyunit_cmos_ram, 0x8000);
-	else
-		memset(midyunit_cmos_ram, 0, 0x8000);
-}
-
-
-
 /*************************************
  *
  *  Memory maps
@@ -1022,7 +1004,7 @@ static MACHINE_CONFIG_START( zunit, driver_device )
 	MDRV_CPU_PROGRAM_MAP(main_map)
 
 	MDRV_MACHINE_RESET(midyunit)
-	MDRV_NVRAM_HANDLER(midyunit)
+	MDRV_NVRAM_ADD_0FILL("nvram")
 
 	/* video hardware */
 	MDRV_VIDEO_ATTRIBUTES(VIDEO_ALWAYS_UPDATE)
@@ -1055,7 +1037,7 @@ static MACHINE_CONFIG_START( yunit_core, driver_device )
 	MDRV_CPU_PROGRAM_MAP(main_map)
 
 	MDRV_MACHINE_RESET(midyunit)
-	MDRV_NVRAM_HANDLER(midyunit)
+	MDRV_NVRAM_ADD_0FILL("nvram")
 
 	/* video hardware */
 	MDRV_VIDEO_ATTRIBUTES(VIDEO_ALWAYS_UPDATE)

src/mame/drivers/midzeus.c

@@ -57,8 +57,6 @@ static UINT8			keypad_select;
 static UINT8			bitlatch[10];
 
 static UINT32 *ram_base;
-static UINT32 *zpram;
-static size_t zpram_size;
 static UINT8 cmos_protected;
 
 static UINT32 *linkram;
@@ -181,38 +179,22 @@ static WRITE32_DEVICE_HANDLER( zeus2_timekeeper_w )
 
 static READ32_HANDLER( zpram_r )
 {
-	return zpram[offset] | 0xffffff00;
+	midzeus_state *state = space->machine->driver_data<midzeus_state>();
+	return state->m_nvram[offset] | 0xffffff00;
 }
 
 
 static WRITE32_HANDLER( zpram_w )
 {
+	midzeus_state *state = space->machine->driver_data<midzeus_state>();
 	if (bitlatch[2])
-		COMBINE_DATA(&zpram[offset]);
+		COMBINE_DATA(&state->m_nvram[offset]);
 	else
 		logerror("%06X:zpram_w with bitlatch[2] = %d\n", cpu_get_pc(space->cpu), bitlatch[2]);
 }
 
 
 
-/*************************************
- *
- *  NVRAM handler (Zeus 2 only)
- *
- *************************************/
-
-static NVRAM_HANDLER( midzeus2 )
-{
-	if (read_or_write)
-		mame_fwrite(file, zpram, zpram_size);
-	else if (file)
-		mame_fread(file, zpram, zpram_size);
-	else
-		memset(zpram, 0xff, zpram_size);
-}
-
-
-
 /*************************************
  *
  *  Miscellaneous bit latches
@@ -608,7 +590,7 @@ static ADDRESS_MAP_START( zeus2_map, ADDRESS_SPACE_PROGRAM, 32 )
 	AM_RANGE(0x880000, 0x88007f) AM_READWRITE(zeus2_r, zeus2_w) AM_BASE(&zeusbase)
 	AM_RANGE(0x8a0000, 0x8a003f) AM_READWRITE(linkram_r, linkram_w) AM_BASE(&linkram)
 	AM_RANGE(0x8d0000, 0x8d000a) AM_READWRITE(bitlatches_r, bitlatches_w)
-	AM_RANGE(0x900000, 0x91ffff) AM_READWRITE(zpram_r, zpram_w) AM_BASE(&zpram) AM_SIZE(&zpram_size) AM_MIRROR(0x020000)
+	AM_RANGE(0x900000, 0x91ffff) AM_READWRITE(zpram_r, zpram_w) AM_SHARE("nvram") AM_MIRROR(0x020000)
 	AM_RANGE(0x990000, 0x99000f) AM_READWRITE(midway_ioasic_r, midway_ioasic_w)
 	AM_RANGE(0x9c0000, 0x9c000f) AM_READWRITE(analog_r, analog_w)
 	AM_RANGE(0x9e0000, 0x9e0000) AM_WRITENOP		// watchdog?
@@ -1151,7 +1133,7 @@ static MACHINE_CONFIG_DERIVED( invasn, midzeus )
 	MDRV_CPU_IO_MAP(pic_io_map)
 MACHINE_CONFIG_END
 
-static MACHINE_CONFIG_START( midzeus2, driver_device )
+static MACHINE_CONFIG_START( midzeus2, midzeus_state )
 
 	/* basic machine hardware */
 	MDRV_CPU_ADD("maincpu", TMS32032, CPU_CLOCK)
@@ -1160,7 +1142,7 @@ static MACHINE_CONFIG_START( midzeus2, driver_device )
 
 	MDRV_MACHINE_START(midzeus)
 	MDRV_MACHINE_RESET(midzeus)
-	MDRV_NVRAM_HANDLER(midzeus2)
+	MDRV_NVRAM_ADD_1FILL("nvram")
 
 	/* video hardware */
 	MDRV_SCREEN_ADD("screen", RASTER)

src/mame/drivers/model2.c

@@ -89,6 +89,7 @@
 #include "emu.h"
 #include "deprecat.h"
 #include "machine/eeprom.h"
+#include "machine/nvram.h"
 #include "video/segaic24.h"
 #include "cpu/i960/i960.h"
 #include "cpu/m68000/m68000.h"
@@ -101,7 +102,7 @@
 #include "includes/model2.h"
 
 UINT32 *model2_bufferram, *model2_colorxlat;
-static UINT32 *model2_workram, *model2_backup1, *model2_backup2;
+static UINT32 *model2_workram;
 UINT32 *model2_textureram0, *model2_textureram1, *model2_lumaram;
 UINT32 *model2_paletteram32;
 static UINT32 model2_intreq;
@@ -278,34 +279,6 @@ static void copro_fifoout_push(running_device *device, UINT32 data)
 	}
 }
 
-
-
-static NVRAM_HANDLER( model2 )
-{
-	if (read_or_write)
-	{
-		mame_fwrite(file, model2_backup1, 0x3fff);
-		if (model2_backup2)
-			mame_fwrite(file, model2_backup2, 0xff);
-	}
-	else
-	{
-		if (file)
-		{
-			mame_fread(file, model2_backup1, 0x3fff);
-			if (model2_backup2)
-				mame_fread(file, model2_backup2, 0xff);
-		}
-		else
-		{
-			/* Virtua Striker needs the nvram to be defaulted with 1s or the ranking gets un-inited. */
-			memset(model2_backup1, 0xff, 0x4000);
-			if (model2_backup2)
-				memset(model2_backup2, 0xff, 0x100);
-		}
-	}
-}
-
 /* Timers - these count down at 25 MHz and pull IRQ2 when they hit 0 */
 static READ32_HANDLER( timers_r )
 {
@@ -1402,7 +1375,7 @@ static ADDRESS_MAP_START( model2_base_mem, ADDRESS_SPACE_PROGRAM, 32 )
 	AM_RANGE(0x01810000, 0x0181bfff) AM_RAM AM_BASE(&model2_colorxlat)
 	AM_RANGE(0x0181c000, 0x0181c003) AM_WRITE(model2_3d_zclip_w)
 	AM_RANGE(0x01a10000, 0x01a1ffff) AM_READWRITE(network_r, network_w)
-	AM_RANGE(0x01d00000, 0x01d03fff) AM_RAM AM_BASE( &model2_backup1 ) // Backup sram
+	AM_RANGE(0x01d00000, 0x01d03fff) AM_RAM AM_SHARE("backup1") // Backup sram
 	AM_RANGE(0x02000000, 0x03ffffff) AM_ROM AM_REGION("user1", 0)
 
 	// "extra" data
@@ -1439,7 +1412,7 @@ static ADDRESS_MAP_START( model2o_mem, ADDRESS_SPACE_PROGRAM, 32 )
 	AM_RANGE(0x01c00014, 0x01c00017) AM_READ_PORT("1c00014")
 	AM_RANGE(0x01c0001c, 0x01c0001f) AM_READ( desert_unk_r )
 	AM_RANGE(0x01c00040, 0x01c00043) AM_READ( daytona_unk_r )
-	AM_RANGE(0x01c00200, 0x01c002ff) AM_RAM AM_BASE( &model2_backup2 )
+	AM_RANGE(0x01c00200, 0x01c002ff) AM_RAM AM_SHARE("backup2")
 	AM_RANGE(0x01c80000, 0x01c80003) AM_READWRITE( model2_serial_r, model2o_serial_w )
 
 	AM_IMPORT_FROM(model2_base_mem)
@@ -2024,7 +1997,8 @@ static MACHINE_CONFIG_START( model2o, driver_device )
 	MDRV_MACHINE_RESET(model2o)
 
 	MDRV_EEPROM_93C46_ADD("eeprom")
-	MDRV_NVRAM_HANDLER( model2 )
+	MDRV_NVRAM_ADD_1FILL("backup1")
+	MDRV_NVRAM_ADD_1FILL("backup2")
 
 	MDRV_TIMER_ADD("timer0", model2_timer_cb)
 	MDRV_TIMER_PTR((FPTR)0)
@@ -2080,7 +2054,7 @@ static MACHINE_CONFIG_START( model2a, driver_device )
 	MDRV_MACHINE_RESET(model2)
 
 	MDRV_EEPROM_93C46_ADD("eeprom")
-	MDRV_NVRAM_HANDLER( model2 )
+	MDRV_NVRAM_ADD_1FILL("backup1")
 
 	MDRV_TIMER_ADD("timer0", model2_timer_cb)
 	MDRV_TIMER_PTR((FPTR)0)
@@ -2181,7 +2155,7 @@ static MACHINE_CONFIG_START( model2b, driver_device )
 	MDRV_MACHINE_RESET(model2b)
 
 	MDRV_EEPROM_93C46_ADD("eeprom")
-	MDRV_NVRAM_HANDLER( model2 )
+	MDRV_NVRAM_ADD_1FILL("backup1")
 
 	MDRV_TIMER_ADD("timer0", model2_timer_cb)
 	MDRV_TIMER_PTR((FPTR)0)
@@ -2226,7 +2200,7 @@ static MACHINE_CONFIG_START( model2c, driver_device )
 	MDRV_MACHINE_RESET(model2c)
 
 	MDRV_EEPROM_93C46_ADD("eeprom")
-	MDRV_NVRAM_HANDLER( model2 )
+	MDRV_NVRAM_ADD_1FILL("backup1")
 
 	MDRV_TIMER_ADD("timer0", model2_timer_cb)
 	MDRV_TIMER_PTR((FPTR)0)

src/mame/drivers/model3.c

@@ -603,6 +603,7 @@ ALL VROM ROMs are 16M MASK
 #include "cpu/powerpc/ppc.h"
 #include "machine/eeprom.h"
 #include "machine/53c810.h"
+#include "machine/nvram.h"
 #include "sound/scsp.h"
 #include "includes/model3.h"
 
@@ -614,7 +615,6 @@ int model3_step;
 UINT32 *model3_vrom;
 
 static UINT64 *work_ram;
-static UINT64 *model3_backup;
 static int model3_crom_bank = 0;
 static int model3_controls_bank;
 static UINT32 real3d_device_id;
@@ -1164,21 +1164,6 @@ static const eeprom_interface eeprom_intf =
 	5				/* reset_delay (Lost World needs this, very similar to wbeachvl in playmark.c) */
 };
 
-static NVRAM_HANDLER( model3 )
-{
-	if (read_or_write)
-	{
-		mame_fwrite(file, model3_backup, 0x1ffff);
-	}
-	else
-	{
-		if (file)
-		{
-			mame_fread(file, model3_backup, 0x1ffff);
-		}
-	}
-}
-
 static const SCSIConfigTable scsi_dev_table =
 {
 	1, /* 1 SCSI device */
@@ -1792,26 +1777,19 @@ static ADDRESS_MAP_START( model3_mem, ADDRESS_SPACE_PROGRAM, 64)
 	AM_RANGE(0x8e000000, 0x8e0fffff) AM_WRITE( real3d_display_list_w )
 	AM_RANGE(0x98000000, 0x980fffff) AM_WRITE( real3d_polygon_ram_w )
 
-	AM_RANGE(0xf0040000, 0xf004003f) AM_READWRITE( model3_ctrl_r, model3_ctrl_w )
+	AM_RANGE(0xf0040000, 0xf004003f) AM_MIRROR(0x0e000000) AM_READWRITE( model3_ctrl_r, model3_ctrl_w )
-	AM_RANGE(0xf0080000, 0xf0080007) AM_READWRITE( model3_sound_r, model3_sound_w )
+	AM_RANGE(0xf0080000, 0xf0080007) AM_MIRROR(0x0e000000) AM_READWRITE( model3_sound_r, model3_sound_w )
-	AM_RANGE(0xf00c0000, 0xf00dffff) AM_RAM	AM_BASE(&model3_backup)	/* backup SRAM */
+	AM_RANGE(0xf00c0000, 0xf00dffff) AM_MIRROR(0x0e000000) AM_RAM AM_SHARE("backup")	/* backup SRAM */
-	AM_RANGE(0xf0100000, 0xf010003f) AM_READWRITE( model3_sys_r, model3_sys_w )
+	AM_RANGE(0xf0100000, 0xf010003f) AM_MIRROR(0x0e000000) AM_READWRITE( model3_sys_r, model3_sys_w )
-	AM_RANGE(0xf0140000, 0xf014003f) AM_READWRITE( model3_rtc_r, model3_rtc_w )
+	AM_RANGE(0xf0140000, 0xf014003f) AM_MIRROR(0x0e000000) AM_READWRITE( model3_rtc_r, model3_rtc_w )
+	AM_RANGE(0xf0180000, 0xf019ffff) AM_MIRROR(0x0e000000) AM_RAM							/* Security Board RAM */
+	AM_RANGE(0xf01a0000, 0xf01a003f) AM_MIRROR(0x0e000000) AM_READ( model3_security_r )	/* Security board */
 
 	AM_RANGE(0xf1000000, 0xf10f7fff) AM_READWRITE( model3_char_r, model3_char_w )	/* character RAM */
 	AM_RANGE(0xf10f8000, 0xf10fffff) AM_READWRITE( model3_tile_r, model3_tile_w )	/* tilemaps */
 	AM_RANGE(0xf1100000, 0xf111ffff) AM_READWRITE( model3_palette_r, model3_palette_w ) AM_BASE(&paletteram64) /* palette */
 	AM_RANGE(0xf1180000, 0xf11800ff) AM_READWRITE( model3_vid_reg_r, model3_vid_reg_w )
 
-	AM_RANGE(0xfe040000, 0xfe04003f) AM_READWRITE( model3_ctrl_r, model3_ctrl_w )
-	AM_RANGE(0xfe080000, 0xfe080007) AM_READWRITE( model3_sound_r, model3_sound_w )
-	AM_RANGE(0xfe0c0000, 0xfe0dffff) AM_RAM	AM_BASE(&model3_backup)	/* backup SRAM */
-	AM_RANGE(0xfe100000, 0xfe10003f) AM_READWRITE( model3_sys_r, model3_sys_w )
-	AM_RANGE(0xfe140000, 0xfe14003f) AM_READWRITE( model3_rtc_r, model3_rtc_w )
-
-	AM_RANGE(0xfe180000, 0xfe19ffff) AM_RAM							/* Security Board RAM */
-	AM_RANGE(0xfe1a0000, 0xfe1a003f) AM_READ( model3_security_r )	/* Security board */
-
 	AM_RANGE(0xff800000, 0xffffffff) AM_ROM AM_REGION("user1", 0)
 ADDRESS_MAP_END
 
@@ -5007,7 +4985,7 @@ static MACHINE_CONFIG_START( model3_10, driver_device )
 	MDRV_MACHINE_RESET(model3_10)
 
 	MDRV_EEPROM_ADD("eeprom", eeprom_intf)
-	MDRV_NVRAM_HANDLER(model3)
+	MDRV_NVRAM_ADD_1FILL("backup")
 
 
 	MDRV_SCREEN_ADD("screen", RASTER)
@@ -5047,7 +5025,7 @@ static MACHINE_CONFIG_START( model3_15, driver_device )
 	MDRV_MACHINE_RESET(model3_15)
 
 	MDRV_EEPROM_ADD("eeprom", eeprom_intf)
-	MDRV_NVRAM_HANDLER(model3)
+	MDRV_NVRAM_ADD_1FILL("backup")
 
 
 	MDRV_SCREEN_ADD("screen", RASTER)
@@ -5087,7 +5065,7 @@ static MACHINE_CONFIG_START( model3_20, driver_device )
 	MDRV_MACHINE_RESET(model3_20)
 
 	MDRV_EEPROM_ADD("eeprom", eeprom_intf)
-	MDRV_NVRAM_HANDLER(model3)
+	MDRV_NVRAM_ADD_1FILL("backup")
 
 
 	MDRV_SCREEN_ADD("screen", RASTER)
@@ -5127,7 +5105,7 @@ static MACHINE_CONFIG_START( model3_21, driver_device )
 	MDRV_MACHINE_RESET(model3_21)
 
 	MDRV_EEPROM_ADD("eeprom", eeprom_intf)
-	MDRV_NVRAM_HANDLER(model3)
+	MDRV_NVRAM_ADD_1FILL("backup")
 
 
 	MDRV_SCREEN_ADD("screen", RASTER)

src/mame/includes/bbusters.h

@@ -2,11 +2,12 @@ class bbusters_state : public driver_device
 {
 public:
 	bbusters_state(running_machine &machine, const driver_device_config_base &config)
-		: driver_device(machine, config) { }
+		: driver_device(machine, config),
+		  eprom_data(*this, "eeprom") { }
 
 	UINT16 *videoram;
 	UINT16 *ram;
-	UINT16 *eprom_data;
+	optional_shared_ptr<UINT16> eprom_data;
 	int sound_status;
 	int gun_select;
 

src/mame/includes/itech32.h

@@ -18,6 +18,8 @@ public:
 	itech32_state(running_machine &machine, const driver_device_config_base &config)
 		: driver_device(machine, config) { }
 
+	void nvram_init(nvram_device &nvram, void *base, size_t length);
+
 	UINT16 *videoram;
 };
 

src/mame/includes/midyunit.h

@@ -5,6 +5,7 @@
 **************************************************************************/
 
 #include "cpu/tms34010/tms34010.h"
+#include "machine/nvram.h"
 
 /*----------- defined in machine/midyunit.c -----------*/
 

src/mame/video/midyunit.c

@@ -73,6 +73,8 @@ static VIDEO_START( common )
 	midyunit_cmos_ram = auto_alloc_array(machine, UINT16, (0x2000 * 4)/2);
 	local_videoram = auto_alloc_array_clear(machine, UINT16, 0x80000/2);
 	pen_map = auto_alloc_array(machine, pen_t, 65536);
+	
+	machine->device<nvram_device>("nvram")->set_base(midyunit_cmos_ram, 0x2000 * 4);
 
 	/* reset all the globals */
 	midyunit_cmos_page = 0;