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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.
Pit & Run - F-1 Race (Taito Corporation, 1984)
Memory Area:pitnrun_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0x8800-0x8FFF2048RAM Write, Sharedvideoram_w, videoram
0x9000-0x9FFF4096RAM Write, Sharedvideoram2_w, videoram2
0xA000-0xA0FF256RAM, Sharedspriteram
0xA800-0xA8078Write NOP(/* Analog Sound */)
0xA8001Read PortSYSTEM
0x0001Coin 1Active High
0x0002Service 1Active High
0x0004Start 1Active High
0x0008Start 2Active High
0x0010UnknownActive High
0x0020UnknownActive High
0x0040UnknownActive High
0x0080UnknownActive High
0xB0001Read Port, WriteDSW, nmi_enable_w
0x0007CoinageActive High
0x00002C_1CActive High
0x00011C_1CActive High
0x00021C_2CActive High
0x00031C_3CActive High
0x00041C_4CActive High
0x00051C_5CActive High
0x00061C_6CActive High
0x00071C_7CActive High
0x000010 Up or 10 DownActive High
0x002020 Up or 20 DownActive High
0x0040CabinetActive High
0x0000UprightActive High
0x0040CocktailActive High
0x0000OffActive High
0x0080OnActive High
0xB0011Writecolor_select_w
0xB0041Write NOP(/* COLOR SEL 2 - not used ?*/)
0xB0051Writechar_bank_select
0xB0061Writehflip_w
0xB0071Writevflip_w
0xB8001Read Port, Device WriteINPUTS, soundlatch, generic_latch_8_device, write
0x0001Joystick LeftActive High
0x0002Joystick RightActive High
0x0004Joystick DownActive High
0x0008Joystick UpActive High
0x0010Button 1Active High
0x0020UnknownActive High
0x0040UnknownActive High
0x0080UnknownActive High
0xC800-0xC8012Writescroll_w
0xC8021Write NOP(/* VP(VF?)MCV - not used ?*/)
0xC8041Writemcu_data_w
0xC8051Writeh_heed_w
0xC8061Writev_heed_w
0xC8071Writeha_w
0xD0001Readmcu_data_r
0xD8001Readmcu_status_r
0xF0001Device Readwatchdog, watchdog_timer_device, reset_r
Memory Area:pitnrun_mcu_map
Address RangeLengthFunctionDescription
0x00001Read/Writem68705_portA_r,m68705_portA_w
0x00011Read/Writem68705_portB_r,m68705_portB_w
0x00021Readm68705_portC_r
0x0003-0x007F125RAM
0x0080-0x07FF1920ROM
Memory Area:pitnrun_sound_io_map
Address RangeLengthFunctionDescription
0x00001Device Writesoundlatch, generic_latch_8_device, clear_w
0x008C-0x008D2Device Writeay2, ay8910_device, address_data_w
0x008E-0x008F2Device Writeay1, ay8910_device, address_data_w
0x008F1Device Readay1, ay8910_device, data_r
0x0090-0x00967Write NOP
0x00971Write NOP
0x00981Write NOP
Memory Area:pitnrun_sound_map
Address RangeLengthFunctionDescription
0x0000-0x2FFF12288ROM
0x3800-0x3BFF1024RAM
 

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:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096pr13CRC(fc8fd05c) (Fluke: 0675)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192pr1CRC(c3b3131e) (Fluke: 1220)
0x2000-0x3FFF8192pr2CRC(2fa1682a) (Fluke: 5E4F)
0x4000-0x5FFF8192pr3CRC(e678fe39) (Fluke: 4009)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192pr4CRC(fbae3504) (Fluke: B9C3)
0x2000-0x3FFF8192pr5CRC(c9177180) (Fluke: B6B4)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096pr6CRC(c53cb897) (Fluke: E00C)
0x1000-0x1FFF4096pr7CRC(7cdf9a55) (Fluke: 6258)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192pr12CRC(587a7b85) (Fluke: CB6F)
0x2000-0x3FFF8192pr11CRC(270cd6dd) (Fluke: FA18)
0x4000-0x5FFF8192pr10CRC(65d92d89) (Fluke: 2D41)
0x6000-0x7FFF8192pr9CRC(3155286d) (Fluke: DDE1)
Memory Area:mcu
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048a11_17.3aCRC(e7d5d6e1) (Fluke: 3AD6)
0x0000-0x07FF2048a11_17.3aCRC(e7d5d6e1) (Fluke: 3AD6)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32clr.1CRC(643012f4) (Fluke: AEFE)
0x0000-0x001F32clr.1CRC(643012f4) (Fluke: AEFE)
0x0020-0x003F32clr.2CRC(50705f02) (Fluke: 8C32)
0x0020-0x003F32clr.2CRC(50705f02) (Fluke: 8C32)
0x0040-0x005F32clr.3CRC(25e70e5e) (Fluke: 9E9D)
0x0040-0x005F32clr.3CRC(25e70e5e) (Fluke: 9E9D)
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192pr8CRC(8e346d10) (Fluke: 6CB7)
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