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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.
Driving Force (Shinkai Inc. (Magic Electronics USA license), 1984)
Memory Area:drivfrcg
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096ROM
0x1480-0x14BF64Mirror, Write, Shared0x6000, galaxold_attributesram_w, attributesram
0x14C0-0x14FF64Mirror, Write Only, Shared0x6000, , spriteram
0x15001Mirror, Read Port0x6000, IN0
0x0001Coin 1Active High
0x0002Coin 2Active High
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010UnknownActive High
0x0020UnknownActive High
0x0040UnknownActive High
0x0080UnknownActive High
0x15031Mirror, Write0x6000, galaxold_coin_counter_w
0x15801Mirror, Read Port0x6000, IN1
0x0001Button 1Active High
0x0002Button 2Active High
0x0004UnknownActive High
0x0008UnknownActive High
0x0010UnknownActive High
0x0020UnknownActive High
0x0040A 2C/1C B 1C/3CActive High
0x0000A 1C/1C B 1C/5CActive High
0x0080UnknownActive High
0x1580-0x15823Mirror, Device Write0x6000, cust, galaxian_sound_device, background_enable_w
0x15831Mirror, Write NOP0x6000,
0x15851Mirror, Write NOP0x6000,
0x1586-0x15872Mirror, Device Write0x6000, cust, galaxian_sound_device, lfo_freq_w
0x16001Mirror, Read Port, Device Write0x6000, DSW0, cust, galaxian_sound_device, pitch_w
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
0x17001Mirror, Read Port, Write NOP0x6000, DSW1,
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
0x17011Mirror, Write NOP0x6000,
0x1704-0x17074Mirror, Device Write0x6000, cust, galaxian_sound_device, vol_w
0x1800-0x1BFF1024Mirror, Write, Shared0x6000, galaxold_videoram_w, videoram
0x1C00-0x1FFF1024Mirror, RAM0x6000,
0x2000-0x2FFF4096ROM
0x4000-0x4FFF4096ROM
0x6000-0x6FFF4096ROM
Memory Area:drivfrcg_io
Address RangeLengthFunctionDescription
0x00001Readdrivfrcg_port0_r
0x00001Read Port, Write NOPSENSE,
0x0080CustomActive High
 

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
0x0000-0x0FFF4096dfgj2.binCRC(8e19f1e7) (Fluke: A39B)
0x1000-0x1FFF4096dfgj1.binCRC(86b60ca8) (Fluke: 3201)
0x2000-0x2FFF4096dfgl2.binCRC(ea5e9959) (Fluke: 284E)
0x3000-0x3FFF4096dfgl1.binCRC(b7ed195c) (Fluke: 4E42)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0800-0x0BFF1024dfgp2.binCRC(9cf4dbce) (Fluke: F3CD)
0x2800-0x2BFF1024dfgp1.binCRC(52d5e77d) (Fluke: 029B)
0x4800-0x4BFF1024dfgp4.binCRC(dd95338b) (Fluke: E86A)
0x6800-0x6BFF1024dfgp3.binCRC(79763f62) (Fluke: AB2C)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32top.clrCRC(3110ddae) (Fluke: EA76)
0x0020-0x003F32bot.clrCRC(0f0782af) (Fluke: 962E)
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