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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.
Van-Van Car (Sanritsu, 1983)
Memory Area:dremshpr_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x43FF1024Mirror, RAM Write, Shared0xa000, pacman_videoram_w, videoram
0x4400-0x47FF1024Mirror, RAM Write, Shared0xa000, pacman_colorram_w, colorram
0x4800-0x4FEF2032Mirror, RAM0xa000,
0x4FF0-0x4FFF16Mirror, RAM, Shared0xa000, , spriteram
0x50001Mirror, Write0xaf38, irq_mask_w
0x50001Mirror, Read Port0xaf3f, IN0
0x0001Joystick UpActive Low
0x0002Joystick LeftActive Low
0x0004Joystick RightActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020Coin 1Active Low
0x0040UnknownActive Low
0x0080Service 1Active Low
0x50021Mirror, Write NOP0xaf38, (/* unknown */)
0x50031Mirror, Write0xaf38, pacman_flipscreen_w
0x5004-0x50052Mirror, Write NOP0xaf38, (// AM_WRITE(pacman_leds_w))
0x50061Mirror, Write NOP0xaf38, (// AM_WRITE(pacman_coin_lockout_global_w))
0x50071Mirror, Write0xaf38, pacman_coin_counter_w
0x50401Mirror, Read Port0xaf3f, IN1
0x0001Joystick UpActive Low
0x0002Joystick LeftActive Low
0x0004Joystick RightActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020Start 1Active Low
0x0040Start 2Active Low
0x0080UnknownActive Low
0x5060-0x506F16Mirror, Write Only, Shared0xaf00, , spriteram2
0x5070-0x507F16Mirror, Write NOP0xaf00,
0x50801Mirror, Write NOP0xaf3f,
0x50801Mirror, Read Port0xaf3f, DSW1
0x0000UprightActive High
0x0001CocktailActive High
0x0002OffActive High
0x0000OnActive High
0x000820k and 100kActive High
0x000440k and 140kActive High
0x000070k and 200kActive High
0x000cNoneActive High
0x00303Active High
0x00204Active High
0x00105Active High
0x00006Active High
0x00002C_1CActive High
0x00c01C_1CActive High
0x00801C_2CActive High
0x00401C_3CActive High
0x50C01Mirror, Device Write0xaf3f, watchdog, watchdog_timer_device, reset_w
0x50C01Mirror, Read Port0xaf3f, DSW2
0x0000OffActive High
0x0001OnActive High
0x0000OffActive High
0x0002OnActive High
0x0000OffActive High
0x0004OnActive High
0x0000OffActive High
0x0008OnActive High
0x0000OffActive High
0x0010OnActive High
0x0000OffActive High
0x0020OnActive High
0x0000OffActive High
0x0040OnActive High
0x0000OffActive High
0x0080OnActive High
0x8000-0xBFFF16384ROM
0xB800-0xB87F128Write NOP
Memory Area:pacman_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384Mirror, ROM0x8000,
0x4000-0x43FF1024Mirror, RAM Write, Shared0xa000, pacman_videoram_w, videoram
0x4400-0x47FF1024Mirror, RAM Write, Shared0xa000, pacman_colorram_w, colorram
0x4800-0x4BFF1024Mirror, Read, Write NOP0xa000, pacman_read_nop,
0x4C00-0x4FEF1008Mirror, RAM0xa000,
0x4FF0-0x4FFF16Mirror, RAM, Shared0xa000, , spriteram
0x50001Mirror, Write0xaf38, irq_mask_w
0x50001Mirror, Read Port0xaf3f, IN0
0x0001Joystick UpActive Low
0x0002Joystick LeftActive Low
0x0004Joystick RightActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020Coin 1Active Low
0x0040UnknownActive Low
0x0080Service 1Active Low
0x50011Mirror, Device Write0xaf38, namco, namco_device, pacman_sound_enable_w
0x50021Mirror, Write NOP0xaf38,
0x50031Mirror, Write0xaf38, pacman_flipscreen_w
0x5004-0x50052Mirror, Write NOP0xaf38, (// AM_WRITE(pacman_leds_w))
0x50061Mirror, Write NOP0xaf38, (// AM_WRITE(pacman_coin_lockout_global_w))
0x50071Mirror, Write0xaf38, pacman_coin_counter_w
0x5040-0x505F32Mirror, Device Write0xaf00, namco, namco_device, pacman_sound_w
0x50401Mirror, Read Port0xaf3f, IN1
0x0001Joystick UpActive Low
0x0002Joystick LeftActive Low
0x0004Joystick RightActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020Start 1Active Low
0x0040Start 2Active Low
0x0080UnknownActive Low
0x5060-0x506F16Mirror, Write Only, Shared0xaf00, , spriteram2
0x5070-0x507F16Mirror, Write NOP0xaf00,
0x50801Mirror, Write NOP0xaf3f,
0x50801Mirror, Read Port0xaf3f, DSW1
0x0000UprightActive High
0x0001CocktailActive High
0x0002OffActive High
0x0000OnActive High
0x000820k and 100kActive High
0x000440k and 140kActive High
0x000070k and 200kActive High
0x000cNoneActive High
0x00303Active High
0x00204Active High
0x00105Active High
0x00006Active High
0x00002C_1CActive High
0x00c01C_1CActive High
0x00801C_2CActive High
0x00401C_3CActive High
0x50C01Mirror, Device Write0xaf3f, watchdog, watchdog_timer_device, reset_w
0x50C01Mirror, Read Port0xaf3f, DSW2
0x0000OffActive High
0x0001OnActive High
0x0000OffActive High
0x0002OnActive High
0x0000OffActive High
0x0004OnActive High
0x0000OffActive High
0x0008OnActive High
0x0000OffActive High
0x0010OnActive High
0x0000OffActive High
0x0020OnActive High
0x0000OffActive High
0x0040OnActive High
0x0000OffActive High
0x0080OnActive High
Memory Area:vanvan_portmap
Address RangeLengthFunctionDescription
0x00011Device Writesn1, sn76496_device, write
0x00021Device Writesn2, sn76496_device, write
Memory Area:writeport
Address RangeLengthFunctionDescription
0x00001Writepacman_interrupt_vector_w (/* Pac-Man only */)
 

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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096van-20.18CRC(60efbe66) (Fluke: A8E5)
0x1000-0x1FFF4096van-21.19CRC(5dd53723) (Fluke: 3AF2)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096van-1.50CRC(cf1b2df0) (Fluke: EDBD)
0x1000-0x1FFF4096van-2.51CRC(df58e1cb) (Fluke: B9E0)
0x2000-0x2FFF4096van-3.52CRC(15571e24) (Fluke: BA81)
0x3000-0x3FFF4096van-4.53CRC(b724cbe0) (Fluke: AB8A)
0x8000-0x8FFF4096van-5.39CRC(db67414c) (Fluke: C927)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F326331-1.6CRC(ce1d9503) (Fluke: 51DC)
0x0020-0x011F2566301-1.37CRC(4b803d9f) (Fluke: E657)
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