Virtua Racing Memory Map

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Memory Map

The following is a memory map that was generated based on the MAME source code (.180). This information is only as accurate as the MAME driver is. If you see any errors, please let me know what that error is.

The Memory Area is related to where the information is from (CPU, Sound Board, etc..), and it may also reflect what it has in common with other hardware.

Virtua Racing (Sega, 1992)

Memory Area:model1_vr_io

Address Range	Length	Function	Description
0xD20000-0xD20003	4	Read	model1_vr_tgp_ram_r
0xD80000-0xD80003	4	Read	model1_vr_tgp_r

Memory Area:model1_vr_mem

Address Range	Length	Function	Description
0x0000-0xFFFFF	1048576	ROM
0x100000-0x1FFFFF	1048576	ROM Bank	bank1
0x200000-0x2FFFFF	1048576	ROM
0x400000-0x40FFFF	65536	RAM Write, Shared	mr2_w, mr2
0x500000-0x53FFFF	262144	RAM Write, Shared	mr_w, mr
0x600000-0x60FFFF	65536	RAM Write, Shared	md0_w, display_list0
0x610000-0x61FFFF	65536	RAM Write, Shared	md1_w, display_list1
0x680000-0x680003	4	Read/Write	model1_listctl_r, model1_listctl_w
0x700000-0x70FFFF	65536	Device Read/Write	tile, segas24_tile, tile_r, tile_w
0x720000-0x720001	2	Write NOP	(// Unknown, always 0)
0x740000-0x740001	2	Write NOP	(// Horizontal synchronization register)
0x760000-0x760001	2	Write NOP	(// Vertical synchronization register)
0x770000-0x770001	2	Write NOP	(// Video synchronization switch)
0x780000-0x7FFFFF	524288	Device Read/Write	tile, segas24_tile, char_r, char_w
0x900000-0x903FFF	16384	RAM Write, Shared	p_w, palette
0x910000-0x91BFFF	49152	RAM, Shared	color_xlat
0xB00000-0xB00FFF	4096	Device Read/Write 8-bit	m1comm, m1comm_device, share_r, share_w, 0xffff
0xB01000-0xB01001	2	Device Read/Write 8-bit	m1comm, m1comm_device, cn_r, cn_w, 0x00ff
0xB01002-0xB01003	2	Device Read/Write 8-bit	m1comm, m1comm_device, fg_r, fg_w, 0x00ff
0xC00000-0xC0003F	64	Read/Write	io_r, io_w
0xC00040-0xC00043	4	Read/Write	network_ctl_r, network_ctl_w
0xC00200-0xC002FF	256	RAM, Shared	nvram
0xC40000-0xC40001	2	Write	snd_latch_to_68k_w
0xC40002-0xC40003	2	Read	snd_68k_ready_r
0xD00000-0xD00001	2	Read/Write	model1_tgp_vr_adr_r, model1_tgp_vr_adr_w
0xD20000-0xD20003	4	Write	model1_vr_tgp_ram_w
0xD80000-0xD80003	4	Write, Mirror	model1_vr_tgp_w, 0x10
0xDC0000-0xDC0003	4	Read	fifoin_status_r
0xE00000-0xE00001	2	Write NOP	(// Watchdog? IRQ ack? Always 0x20, usually on irq)
0xE00004-0xE00005	2	Write	bank_w
0xE0000C-0xE0000F	4	Write NOP
0xFC0000-0xFFFFFF	262144	ROM

ROM Map for this game

This is the ROM map for the game. This should tell you what address the ROM is at, how big it is, what it's used for.

Memory Area:M1AUDIO_MPCM1_REGION

Address Range	Length	Label/Location	Description
0x0000-0x1FFFFF	2097152	mpr-14873.32	CRC(b1965190) (Fluke: 31E2)

Memory Area:M1AUDIO_MPCM2_REGION

Address Range	Length	Label/Location	Description
0x0000-0x1FFFFF	2097152	mpr-14876.4	CRC(ba6b2327) (Fluke: BEBB)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0xFC0000-0xFDFFFF	131072	epr-14878a.4	CRC(6d69e695) (Fluke: 3331)
0xFE0000-0xFFFFFF	131072	epr-14879a.5	CRC(d45af9dd) (Fluke: 09F1)

Memory Area:nvram

Address Range	Length	Label/Location	Description
0x0000-0xFFFF	65536	epr-14869.25	CRC(6187cd7a)
0x0000-0xFFFF	65536	epr-14869b.25	CRC(b410f22b)
0x0000-0x00FF	256	vr_defaults.nv	CRC(5ccdc835)

Memory Area:tgp

Address Range	Length	Label/Location	Description
0x0000-0x1FFF	8192	vr-tgp.bin	BAD_DUMP CRC(3de33c7f) (Fluke: 41E9)