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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.
Speed Spin (TCH, 1994)
Memory Area:io_map
Address RangeLengthFunctionDescription
0x00071Writedisplay_disable_w
0x00101Read PortSYSTEM
0x0001UnknownActive Low
0x0002Start 2Active Low
0x0004UnknownActive Low
0x0008Start 1Active Low
0x0010UnknownActive Low
0x0020Coin 2Active Low
0x0040UnknownActive Low
0x0080Coin 1Active Low
0x00111Read PortP1
0x0001UnknownActive Low
0x0002Button 3Active Low
0x0004Button 2Active Low
0x0008Button 1Active Low
0x0010Joystick RightActive Low
0x0020Joystick LeftActive Low
0x0040Joystick DownActive Low
0x0080Joystick UpActive Low
0x00121Read Port, WriteP2, rombank_w
0x0001UnknownActive Low
0x0002Button 3Active Low
0x0004Button 2Active Low
0x0008Button 1Active Low
0x0010Joystick RightActive Low
0x0020Joystick LeftActive Low
0x0040Joystick DownActive Low
0x0080Joystick UpActive Low
0x00131Read Port, WriteDSW1, sound_w
0x000fCoin_AActive High
0x00015C_1CActive High
0x00044C_1CActive High
0x00073C_1CActive High
0x00005 Coins/2 CreditsActive High
0x000a2C_1CActive High
0x00063C_2CActive High
0x00034C_3CActive High
0x000f1C_1CActive High
0x00024C_5CActive High
0x00053 Coins/5 CreditsActive High
0x00092C_3CActive High
0x000e1C_2CActive High
0x00082C_5CActive High
0x000d1C_3CActive High
0x000c1C_4CActive High
0x000b1C_5CActive High
0x00f0Coin_BActive High
0x00105C_1CActive High
0x00404C_1CActive High
0x00703C_1CActive High
0x00005 Coins/2 CreditsActive High
0x00a02C_1CActive High
0x00603C_2CActive High
0x00304C_3CActive High
0x00f01C_1CActive High
0x00204C_5CActive High
0x00503 Coins/5 CreditsActive High
0x00902C_3CActive High
0x00e01C_2CActive High
0x00802C_5CActive High
0x00d01C_3CActive High
0x00c01C_4CActive High
0x00b01C_5CActive High
0x00141Read PortDSW2
0x0000OffActive High
0x0001OnActive High
0x0002AutomaticActive High
0x0000ManualActive High
0x000c11 Points and 1 AdvantageActive High
0x000811 Points and 2 AdvantageActive High
0x000421 Points and 1 AdvantageActive High
0x000021 Points and 2 AdvantageActive High
0x0030DifficultyActive High
0x0020EasyActive High
0x0030NormalActive High
0x0010HardActive High
0x0000HardestActive High
0x0040Demo_SoundsActive High
0x0000OffActive High
0x0040OnActive High
0x00161Readirq_ack_r (// @@@ could be watchdog, value is discarded)
0x00171Writevidram_bank_w
Memory Area:program_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM Device Write, Sharedpalette, palette_device, write, palette (/* RAM COLOUR */)
0x8800-0x8FFF2048RAM Write, Sharedattram_w, attram
0x9000-0x9FFF4096Read/Writevidram_r, vidram_w (/* RAM FIX / RAM OBJECTS (selected by bit 0 of port 17) */)
0xA000-0xA7FF2048RAM
0xA800-0xAFFF2048RAM
0xB000-0xBFFF4096RAM(/* RAM PROGRAM */)
0xC000-0xFFFF16384ROM Bankprgbank (/* banked ROM */)
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x87FF2048RAM
0x90001Writeokibank_w
0x98001Device Read/Writeoki, okim6295_device, read, write
0xA0001Device Readsoundlatch, generic_latch_8_device, read
 

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
0x0000-0xFFFF65536tch-ss2.u96CRC(4611fd0c) (Fluke: A793)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072tch-ss4.u70CRC(41517859) (Fluke: 68DC)
0x20000-0x3FFFF131072tch-ss5.u69CRC(832b2f34) (Fluke: AFEC)
0x40000-0x5FFFF131072tch-ss6.u60CRC(f1fd7289) (Fluke: 4F81)
0x60000-0x7FFFF131072tch-ss7.u59CRC(c4958543) (Fluke: 80D8)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072tch-ss8.u39CRC(2f27b16d) (Fluke: 683D)
0x20000-0x3FFFF131072tch-ss9.u34CRC(c372f8ec) (Fluke: 55DE)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288tch-ss1.u78CRC(41b6b45b) (Fluke: A3E3)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288tch-ss3.u95CRC(1c9deb5e) (Fluke: 585B)
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