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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.
Grand Prix Star (Jaleco, 1991)
Memory Area:bigrun_map
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM(// ROM)
0x80000-0x800012Read Port, WriteIN1, leds_out_w (// Coins)
0x00014C_1CActive High
0x00023C_1CActive High
0x00032C_1CActive High
0x00071C_1CActive High
0x00061C_2CActive High
0x00051C_3CActive High
0x00041C_4CActive High
0x0000Free_PlayActive High
0x00084C_1CActive High
0x00103C_1CActive High
0x00182C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x00201C_4CActive High
0x0040UnknownActive High
0x0040OffActive High
0x0000OnActive High
0x00071C_1CActive High
0x00002C_3CActive High
0x00061C_2CActive High
0x00051C_3CActive High
0x00041C_4CActive High
0x00031C_5CActive High
0x00021C_6CActive High
0x00011C_7CActive High
0x00005C_1CActive High
0x00084C_1CActive High
0x00103C_1CActive High
0x00182C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x00201C_4CActive High
0x0040OffActive High
0x0000OnActive High
0x0300RegionActive High
0x0300JapanActive High
0x0200USAActive High
0x0100EuropeActive High
0x0000FranceActive High
0x0c00DifficultyActive High
0x0000EasyActive High
0x0c00NormalActive High
0x0800HardActive High
0x0400Very_HardActive High
0x1000OffActive High
0x0000OnActive High
0x2000Demo_SoundsActive High
0x0000OffActive High
0x2000OnActive High
0x4000UnknownActive High
0x4000OffActive High
0x0000OnActive High
0x0000OffActive High
0x4000OnActive High
0x8000TorqueActive High
0x0000ShakeActive High
0x80002-0x800032Read Port, WriteIN2, unknown_out_w (// Buttons)
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0010Start 1Active Low
0x0020P1 Gear ShiftActive Low
0x0040P1 BrakeActive Low
0x0080Start 2Active Low
0x80004-0x800052Read Port, WriteIN3, motor_out_w (// Motor Limit Switches)
0x0001UnknownActive Low
0x0002UnknownActive Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x0100UnknownActive Low
0x0200UnknownActive Low
0x0400UnknownActive Low
0x0800UnknownActive Low
0x1000UnknownActive Low
0x2000UnknownActive Low
0x4000UnknownActive Low
0x8000UnknownActive Low
0x80006-0x800072Read Port, WriteIN4, wheel_out_w (// DSW 1 & 2)
0x0001SlaveActive High
0x0000MasterActive High
0x00060 (Red-White Car)Active High
0x00041 (Red Car)Active High
0x00022 (Blue-White Car)Active High
0x00003 (Blue Car)Active High
0x80008-0x800092Device Readsoundlatch2, generic_latch_16_device, read (// From sound cpu)
0x8000A-0x8000B2Device Writesoundlatch, generic_latch_16_device, write (// To sound cpu)
0x8000C-0x8000D2Write NOP(// ??)
0x80010-0x800112Read/Writebigrun_ip_select_r, ip_select_w
0x80012-0x800132Writeip_select_plus1_w
0x82000-0x820056Device Read/Writescroll0, megasys1_tilemap_device, scroll_r, scroll_w
0x82008-0x8200D6Device Read/Writescroll1, megasys1_tilemap_device, scroll_r, scroll_w
0x82100-0x821056Device Read/Writescroll2, megasys1_tilemap_device, scroll_r, scroll_w
0x82108-0x821092Read/Write NOP(// ? written with 0 only)
0x82200-0x822012Read PortIN5 (// DSW 3 (4 bits))
0x00ffPaddleActive High
0x82208-0x822092Read/Write NOP(// watchdog reset)
0x82308-0x823092Writecischeat_comms_w
0x82400-0x824012Writeactive_layers_w
0x84000-0x847FF2048RAM(// Linking with other units)
0x88000-0x8BFFF16384RAM, Sharedshare2 (// Sharedram with sub CPU#2)
0x8C000-0x8FFFF16384RAM, Sharedshare1 (// Sharedram with sub CPU#1)
0x90000-0x93FFF16384RAM Device Write, Sharedscroll0, megasys1_tilemap_device, write, scroll0 (// Scroll ram 0)
0x94000-0x97FFF16384RAM Device Write, Sharedscroll1, megasys1_tilemap_device, write, scroll1 (// Scroll ram 1)
0x98000-0x9BFFF16384RAM Device Write, Sharedscroll2, megasys1_tilemap_device, write, scroll2 (// Scroll ram 2)
0x9C000-0x9FFFF16384RAM Device Write, Sharedpalette, palette_device, write, palette (// Palettes)
0xF0000-0xFFFFF65536RAM, Sharedram (// RAM)
0x100000-0x13FFFF262144ROM, Regionuser1,0 (// ROM)
Memory Area:bigrun_map2
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM(// ROM)
0x40000-0x47FFF32768RAM, Sharedshare1 (// Shared RAM (with Main CPU))
0x80000-0x807FF2048RAM, Sharedroadram.0 (// Road RAM)
0xC0000-0xC3FFF16384RAM(// RAM)
Memory Area:bigrun_map3
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM(// ROM)
0x40000-0x47FFF32768RAM, Sharedshare2 (// Shared RAM (with Main CPU))
0x80000-0x807FF2048RAM, Sharedroadram.1 (// Road RAM)
0xC0000-0xC3FFF16384RAM(// RAM)
Memory Area:bigrun_sound_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM(// ROM)
0x40000-0x400012Device Read, Writesoundlatch, generic_latch_16_device, read, bigrun_soundbank_w (// From Main CPU)
0x60000-0x600012Device Writesoundlatch2, generic_latch_16_device, write (// To Main CPU)
0x80000-0x800034Device Read/Write 8-bitymsnd, ym2151_device, read, write, 0x00ff
0xA0000-0xA00034Device Read/Write 8-bitoki1, okim6295_device, read, write, 0x00ff
0xC0000-0xC00034Device Read/Write 8-bitoki2, okim6295_device, read, write, 0x00ff
0xF0000-0xFFFFF65536RAM(// RAM)
Memory Area:f1gpstar_map
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM(// ROM)
0x80000-0x800012Read PortIN1 (// DSW 1 & 2)
0x00014C_1CActive High
0x00023C_1CActive High
0x00032C_1CActive High
0x00071C_1CActive High
0x00061C_2CActive High
0x00051C_3CActive High
0x00041C_4CActive High
0x0000Free_PlayActive High
0x00084C_1CActive High
0x00103C_1CActive High
0x00182C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x00201C_4CActive High
0x0040UnknownActive High
0x0040OffActive High
0x0000OnActive High
0x00071C_1CActive High
0x00002C_3CActive High
0x00061C_2CActive High
0x00051C_3CActive High
0x00041C_4CActive High
0x00031C_5CActive High
0x00021C_6CActive High
0x00011C_7CActive High
0x00005C_1CActive High
0x00084C_1CActive High
0x00103C_1CActive High
0x00182C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x00201C_4CActive High
0x0040OffActive High
0x0000OnActive High
0x0300RegionActive High
0x0300JapanActive High
0x0200USAActive High
0x0100EuropeActive High
0x0000FranceActive High
0x0c00DifficultyActive High
0x0000EasyActive High
0x0c00NormalActive High
0x0800HardActive High
0x0400Very_HardActive High
0x1000OffActive High
0x0000OnActive High
0x2000Demo_SoundsActive High
0x0000OffActive High
0x2000OnActive High
0x4000UnknownActive High
0x4000OffActive High
0x0000OnActive High
0x0000OffActive High
0x4000OnActive High
0x8000TorqueActive High
0x0000ShakeActive High
0x80004-0x800052Read Port, WriteIN2, f1gpstar_motor_w (// Buttons)
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0010Start 1Active Low
0x0020P1 Gear ShiftActive Low
0x0040P1 BrakeActive Low
0x0080Start 2Active Low
0x80006-0x800072Read PortIN3 (// ? Read at boot only)
0x0001UnknownActive Low
0x0002UnknownActive Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x0100UnknownActive Low
0x0200UnknownActive Low
0x0400UnknownActive Low
0x0800UnknownActive Low
0x1000UnknownActive Low
0x2000UnknownActive Low
0x4000UnknownActive Low
0x8000UnknownActive Low
0x80008-0x800092Device Readsoundlatch2, generic_latch_16_device, read (// From sound cpu)
0x80008-0x800092Device Writesoundlatch, generic_latch_16_device, write (// To sound cpu)
0x8000C-0x8000D2Read PortIN4 (// DSW 3)
0x0001SlaveActive High
0x0000MasterActive High
0x00060 (Red-White Car)Active High
0x00041 (Red Car)Active High
0x00022 (Blue-White Car)Active High
0x00003 (Blue Car)Active High
0x80010-0x800112Read, Write NOPf1gpstar_wheel_r, (// Accel + Driving Wheel)
0x80014-0x800152Write NOP
0x80018-0x800192Writef1gpstar_soundint_w
0x82000-0x820056Device Read/Writescroll0, megasys1_tilemap_device, scroll_r, scroll_w
0x82008-0x8200D6Device Read/Writescroll1, megasys1_tilemap_device, scroll_r, scroll_w
0x82100-0x821056Device Read/Writescroll2, megasys1_tilemap_device, scroll_r, scroll_w
0x82108-0x821092Read/Write NOP(// ? written with 0 only)
0x82208-0x822092Read/Write NOP(// watchdog reset)
0x82308-0x823092Read NOP, Writef1gpstar_comms_w
0x82400-0x824012Writeactive_layers_w
0x88000-0x883FF1024RAM(// Linking with other units)
0x90000-0x97FFF32768RAM, Sharedshare2 (// Sharedram with sub CPU#2)
0x98000-0x9FFFF32768RAM, Sharedshare1 (// Sharedram with sub CPU#1)
0xA0000-0xA7FFF32768RAM Device Write, Sharedscroll0, megasys1_tilemap_device, write, scroll0 (// Scroll ram 0)
0xA8000-0xAFFFF32768RAM Device Write, Sharedscroll1, megasys1_tilemap_device, write, scroll1 (// Scroll ram 1)
0xB0000-0xB7FFF32768RAM Device Write, Sharedscroll2, megasys1_tilemap_device, write, scroll2 (// Scroll ram 2)
0xB8000-0xBFFFF32768RAM Device Write, Sharedpalette, palette_device, write, palette (// Palettes)
0xF0000-0xFFFFF65536RAM, Sharedram (// RAM)
0x100000-0x17FFFF524288ROM, Regionuser1,0 (// ROM)
Memory Area:f1gpstar_map2
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM(// ROM)
0x80000-0x807FF2048RAM, Sharedshare1 (// Shared RAM (with Main CPU))
0x100000-0x1007FF2048RAM, Sharedroadram.0 (// Road RAM)
0x180000-0x183FFF16384RAM(// RAM)
0x200000-0x2000012Write NOP(// watchdog)
Memory Area:f1gpstar_map3
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM(// ROM)
0x80000-0x807FF2048RAM, Sharedshare2 (// Shared RAM (with Main CPU))
0x100000-0x1007FF2048RAM, Sharedroadram.1 (// Road RAM)
0x180000-0x183FFF16384RAM(// RAM)
0x200000-0x2000012Write NOP(// watchdog)
Memory Area:f1gpstar_sound_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM(// ROM)
0x40004-0x400052Writecischeat_soundbank_1_w (// Sample Banking (cischeat: 40002))
0x40008-0x400092Writecischeat_soundbank_2_w (// Sample Banking (cischeat: 40004))
0x60000-0x600012Device Read, Device Writesoundlatch, generic_latch_16_device, read, soundlatch2, generic_latch_16_device, write (// From Main CPU (cischeat: 60004))
0x80000-0x800034Device Read/Write 8-bitymsnd, ym2151_device, read, write, 0x00ff
0xA0000-0xA00034Device Read/Write 8-bitoki1, okim6295_device, read, write, 0x00ff
0xC0000-0xC00034Device Read/Write 8-bitoki2, okim6295_device, read, write, 0x00ff
0xE0000-0xFFFFF131072RAM(// RAM (cischeat: f0000-fffff))
 

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:oki1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF52428890015-34.w32CRC(2ca9b062) (Fluke: 63A3)
0x0000-0x7FFFF52428890015-34.w32CRC(2ca9b062) (Fluke: 63A3)
Memory Area:oki2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF52428890015-33.w31CRC(6121d247) (Fluke: D0F7)
0x0000-0x7FFFF52428890015-33.w31CRC(6121d247) (Fluke: D0F7)
Memory Area:road0
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF52428890015-05.w10CRC(8eb48a23) (Fluke: 9712)
0x0000-0x7FFFF52428890015-05.w10CRC(8eb48a23) (Fluke: 9712)
0x80000-0xFFFFF52428890015-06.w11CRC(32063a68) (Fluke: 416E)
0x80000-0xFFFFF52428890015-06.w11CRC(32063a68) (Fluke: 416E)
0x100000-0x17FFFF52428890015-07.w12CRC(0d0d54f3) (Fluke: 42B2)
0x100000-0x17FFFF52428890015-07.w12CRC(0d0d54f3) (Fluke: 42B2)
0x180000-0x1FFFFF52428890015-08.w14CRC(f48a42c5) (Fluke: 2AE0)
0x180000-0x1FFFFF52428890015-08.w14CRC(f48a42c5) (Fluke: 2AE0)
Memory Area:road1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF52428890015-09.w13CRC(55f49315) (Fluke: 7540)
0x0000-0x7FFFF52428890015-09.w13CRC(55f49315) (Fluke: 7540)
0x80000-0xFFFFF52428890015-10.w15CRC(678be0cb) (Fluke: AC54)
0x80000-0xFFFFF52428890015-10.w15CRC(678be0cb) (Fluke: AC54)
Memory Area:scroll0
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF52428890015-31.r56CRC(0c8f0e2b) (Fluke: 2294)
0x0000-0x7FFFF52428890015-31.r56CRC(0c8f0e2b) (Fluke: 2294)
Memory Area:scroll1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF52428890015-32.r57CRC(9c921cfb) (Fluke: 9AAD)
0x0000-0x7FFFF52428890015-32.r57CRC(9c921cfb) (Fluke: 9AAD)
Memory Area:scroll2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF1310729188a-30.v10CRC(0ef1fbf1) (Fluke: B186)
0x0000-0x1FFFF1310729188a-30.v10CRC(0ef1fbf1) (Fluke: B186)
Memory Area:user2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF52428890015-20.r45CRC(9d428fb7) (Fluke: 08D2)
0x0000-0x07FF2048pr90015aCRC(777583db) (Fluke: 8FA9)
0x0000-0x0FFF4096ch9072-4CRC(5bc23535) (Fluke: 440B)
0x0000-0x01FF512pr88004qCRC(9327dc37) (Fluke: E257)
0x0000-0x07FF2048pr90015aCRC(777583db) (Fluke: 8FA9)
0x0000-0x7FFFF52428890015-03.w08CRC(ccf5b158) (Fluke: B3AF)
0x0000-0x0FFF4096ch9072-6CRC(76ff63c5) (Fluke: 1BB2)
0x0000-0x7FFFF52428890015-03.w08CRC(ccf5b158) (Fluke: B3AF)
0x0000-0x7FFFF52428890015-20.r45CRC(9d428fb7) (Fluke: 08D2)
0x0000-0x7FFFF52428890015-04.w09CRC(5b324c81) (Fluke: 2995)
0x0000-0x00FF256pr88004wCRC(3d648467) (Fluke: EB3D)
0x0000-0x00FF256pr88004wCRC(3d648467) (Fluke: EB3D)
0x0000-0x7FFFF52428890015-04.w09CRC(5b324c81) (Fluke: 2995)
0x0000-0x00FF256pr90015bCRC(be240dac) (Fluke: BD56)
0x0000-0x7FFFF52428890015-01.w06CRC(ce4bfe6e) (Fluke: E4BC)
0x0000-0x0FFF4096ch9072-5CRC(0efac5b4) (Fluke: 5777)
0x0000-0x01FF512pr88004qCRC(9327dc37) (Fluke: E257)
0x0000-0x0FFF4096ch9072-8CRC(ca04bace) (Fluke: AE9E)
0x0000-0x7FFFF52428890015-02.w07CRC(fcbecc9b) (Fluke: 27CF)
0x0000-0x0FFF4096ch9072-8CRC(ca04bace) (Fluke: AE9E)
0x0000-0x7FFFF52428890015-01.w06CRC(ce4bfe6e) (Fluke: E4BC)
0x0000-0x0FFF4096ch9072-6CRC(76ff63c5) (Fluke: 1BB2)
0x0000-0x0FFF4096ch9072-4CRC(5bc23535) (Fluke: 440B)
0x0000-0x0FFF4096ch9072-5CRC(0efac5b4) (Fluke: 5777)
0x0000-0x7FFFF52428890015-02.w07CRC(fcbecc9b) (Fluke: 27CF)
0x0000-0x00FF256pr90015bCRC(be240dac) (Fluke: BD56)
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