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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 Champion (Taito, 1981)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x43FF1024Mirror, RAM0x0400,
0x4800-0x4BFF1024Mirror, RAM, Shared0x0400, , radarram
0x5000-0x53FF1024Mirror, RAM, Shared0x0400, , videoram
0x5800-0x58FF256Mirror, RAM, Shared0x0700, , spriteram
Memory Area:main_portmap
Address RangeLengthFunctionDescription
0x0000-0x000F16Mirror, Write0x40, cpu0_outputs_w
0x00001Mirror, Read Port0x78, ACCEL
0x00ffPedalActive High
0x00011Mirror, Read0x60, pc3259_0_r
0x00021Mirror, Read0x78, sub_to_main_comm_r
0x00031Mirror, Read Port0x78, WHEEL
0x00ffDialActive High
0x00041Mirror, Read Port0x78, DSWA
0x000fCoin_AActive High
0x000f9C_1CActive High
0x000e8C_1CActive High
0x000d7C_1CActive High
0x000c6C_1CActive High
0x000b5C_1CActive High
0x000a4C_1CActive High
0x00093C_1CActive High
0x00082C_1CActive High
0x00001C_1CActive High
0x00011C_2CActive High
0x00021C_3CActive High
0x00031C_4CActive High
0x00041C_5CActive High
0x00051C_6CActive High
0x00061C_7CActive High
0x00071C_8CActive High
0x00f0Coin_BActive High
0x00f09C_1CActive High
0x00e08C_1CActive High
0x00d07C_1CActive High
0x00c06C_1CActive High
0x00b05C_1CActive High
0x00a04C_1CActive High
0x00903C_1CActive High
0x00802C_1CActive High
0x00001C_1CActive High
0x00101C_2CActive High
0x00201C_3CActive High
0x00301C_4CActive High
0x00401C_5CActive High
0x00501C_6CActive High
0x00601C_7CActive High
0x00701C_8CActive High
0x00051Mirror, Read Port0x78, DSWB
0x00004thActive High
0x00025thActive High
0x00016thActive High
0x00037thActive High
0x0000OffActive High
0x0008OnActive High
0x00101 WayActive High
0x00002 WayActive High
0x0020NoActive High
0x0000YesActive High
0x0000LEDsActive High
0x0040On ScreenActive High
0x0080UnknownActive High
0x0000OffActive High
0x0080OnActive High
0x00061Mirror, Read Port0x78, TILT
0x0001UnusedActive Low
0x0002Service 3Active Low
0x0004Joystick UpActive High
0x0008UnusedActive Low
0x0010TiltActive Low
0x0020Service 1Active Low
0x0040Coin 2Active Low
0x0080Coin 1Active Low
0x00091Mirror, Read0x60, pc3259_1_r
0x0010-0x00134Mirror, Write0x40, main_to_sub_comm_w
0x00111Mirror, Read0x60, pc3259_2_r
0x00191Mirror, Read0x60, pc3259_3_r
0x00201Mask, Mirror, Write0x0c, 0x53, led_board_w
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x4000-0x43FF1024RAM
0x4800-0x48012Mirror, Device Write0x07f8, ay1, ay8910_device, address_data_w
0x48011Mirror, Device Read0x07f8, ay1, ay8910_device, data_r
0x4802-0x48032Mirror, Device Write0x07f8, ay2, ay8910_device, address_data_w
0x48031Mirror, Device Read0x07f8, ay2, ay8910_device, data_r
0x4804-0x48052Mirror, Device Write0x07fa, ay3, ay8910_device, address_data_w
0x48051Mirror, Device Read0x07fa, ay3, ay8910_device, data_r
0x50001Device Readsoundlatch, generic_latch_8_device, read
Memory Area:sub_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x2000-0x27FF2048RAM Write, Sharedleft_w, leftram
0x2800-0x2FFF2048RAM Write, Sharedright_w, rightram
0x3000-0x37FF2048RAM Write, Sharedcenter_w, centerram
0x4000-0x43FF1024Mirror, RAM0x0400,
0x5000-0x6FFF8192ROM
Memory Area:sub_portmap
Address RangeLengthFunctionDescription
0x0000-0x000F16Mirror, Write0x70, cpu1_outputs_w
0x0000-0x00034Readmain_to_sub_comm_r
 

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
0x0000-0x0FFF4096gm07CRC(65dcc572) (Fluke: EE02)
0x1000-0x1FFF4096gm08CRC(224d880c) (Fluke: C807)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096gm02CRC(5911948d) (Fluke: C367)
0x1000-0x1FFF4096gm01CRC(846f8e89) (Fluke: AF6B)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096gr20CRC(88ba2c03) (Fluke: F6E8)
0x1000-0x1FFF4096gr19CRC(ff34b444) (Fluke: FEB4)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096gr21CRC(2f77a9f3) (Fluke: 4220)
0x1000-0x1FFF4096gr22CRC(31bb5fc7) (Fluke: 6FA9)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096gr13CRC(d5e19ebd) (Fluke: A302)
0x1000-0x1FFF4096gr14CRC(d129b8e4) (Fluke: 0189)
Memory Area:gfx5
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048gr10CRC(b1f0a873) (Fluke: 9D5B)
Memory Area:gfx6
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048gr12CRC(f3bc599e) (Fluke: 2005)
Memory Area:gfx7
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096gr11CRC(54eb3ec9) (Fluke: B262)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096gm03CRC(47fda76e) (Fluke: 0C69)
0x1000-0x1FFF4096gm04CRC(07a623dc) (Fluke: BEC1)
0x2000-0x2FFF4096gm05CRC(716e1fba) (Fluke: E7D3)
0x3000-0x3FFF4096gm06CRC(157db30b) (Fluke: B51D)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32gr23.bprCRC(41c6c48d),background colors (Fluke: 7585)
0x0020-0x003F32gr09.bprCRC(260fb2b9),sprite/text colors (Fluke: D51D)
Memory Area:sub
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096gm09CRC(d57bd109) (Fluke: 9C07)
0x1000-0x1FFF4096gm10CRC(41ba07f1) (Fluke: 13DD)
0x5000-0x5FFF4096gr16CRC(885d708e) (Fluke: D132)
0x6000-0x6FFF4096gr15CRC(a822430b) (Fluke: 3BBB)
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