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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.
Mad Gear (Capcom, 1989)
Memory Area:madgear_map
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM
0xFC1800-0xFC1FFF2048RAM, Sharedspriteram
0xFC4000-0xFC40012Read Port, WriteDSW1, lastduel_flip_w
0x0001Allow_ContinueActive High
0x0000NoActive High
0x0001YesActive High
0x0002Flip_ScreenActive High
0x0002OffActive High
0x0000OnActive High
0x000cDifficultyActive High
0x0008EasyActive High
0x000cNormalActive High
0x0004DifficultActive High
0x0000Very_DifficultActive High
0x0030CabinetActive High
0x0030Upright One PlayerActive High
0x0000Upright Two PlayersActive High
0x0010CocktailActive High
0x0020Upright One PlayerActive High
0x0040Demo_SoundsActive High
0x0000OffActive High
0x0040OnActive High
0x0000OffActive High
0x0080OnActive High
0x7f00UnusedActive Low
0xFC4002-0xFC40032Read Port, WriteDSW2, lastduel_sound_w
0x0f00Coin_BActive High
0x02006C_1CActive High
0x04005C_1CActive High
0x05004C_1CActive High
0x07003C_1CActive High
0x01008C_3CActive High
0x09002C_1CActive High
0x03005C_3CActive High
0x06003C_2CActive High
0x0f001C_1CActive High
0x00001C_1CActive High
0x08002C_3CActive High
0x0e001C_2CActive High
0x0d001C_3CActive High
0x0c001C_4CActive High
0x0b001C_5CActive High
0x0a001C_6CActive High
0xf000Coin_AActive High
0x20006C_1CActive High
0x40005C_1CActive High
0x50004C_1CActive High
0x70003C_1CActive High
0x10008C_3CActive High
0x90002C_1CActive High
0x30005C_3CActive High
0x60003C_2CActive High
0xf0001C_1CActive High
0x80002C_3CActive High
0xe0001C_2CActive High
0xd0001C_3CActive High
0xc0001C_4CActive High
0xb0001C_5CActive High
0xa0001C_6CActive High
0x0000Free_PlayActive High
0xFC4004-0xFC40052Read PortP1_P2
0x0001UnusedActive Low
0x0002Button 3Active Low
0x0004Button 2Active Low
0x0008Button 1Active Low
0x0010Joystick RightActive Low
0x0020Joystick LeftActive Low
0x0040Joystick DownActive Low
0x0080Joystick UpActive Low
0x0100UnusedActive Low
0x0200Button 3Active Low
0x0400Button 2Active Low
0x0800Button 1Active Low
0x1000Joystick RightActive Low
0x2000Joystick LeftActive Low
0x4000Joystick DownActive Low
0x8000Joystick UpActive Low
0xFC4006-0xFC40072Read PortSYSTEM
0x0100UnknownActive Low
0x0200Start 2Active Low
0x0400Start 1Active Low
0x0800Coin 2Active Low
0x1000Coin 1Active Low
0x2000UnknownActive Low
0x4000UnknownActive Low
0x8000Service 1Active Low
0xFC8000-0xFC9FFF8192RAM Write, Sharedlastduel_vram_w, vram
0xFCC000-0xFCC7FF2048RAM Write, Sharedlastduel_palette_word_w, paletteram
0xFD0000-0xFD000F16Writelastduel_scroll_w
0xFD4000-0xFD7FFF16384RAM Write, Sharedmadgear_scroll1_w, scroll1
0xFD8000-0xFDFFFF32768RAM Write, Sharedmadgear_scroll2_w, scroll2
0xFF0000-0xFFFFFF65536RAM
Memory Area:madgear_sound_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0xCFFF20480ROM Bankbank1
0xD000-0xD7FF2048RAM
0xF000-0xF0012Device Read/Writeym1, ym2203_device, read, write
0xF002-0xF0032Device Read/Writeym2, ym2203_device, read, write
0xF0041Device Writeoki, okim6295_device, write
0xF0061Device Readsoundlatch, generic_latch_8_device, read
0xF00A1Writemg_bankswitch_w
 

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
0x0000-0x7FFF32768mg_05.14jCRC(2fbfc945) (Fluke: BC4F)
0x0000-0x7FFF32768mg_05.14jCRC(2fbfc945) (Fluke: BC4F)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768mg_06.10kCRC(382ee59b),8x8 text (Fluke: 0CC0)
0x0000-0x7FFF32768mg_06.10kCRC(382ee59b),8x8 text (Fluke: 0CC0)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144ls-12.7lCRC(6c1b2c6c),NEC 23C2000 256kx8 mask ROM (QFP52) (Fluke: 6F33)
0x0000-0x3FFFF262144ls-12.7lCRC(6c1b2c6c),NEC 23C2000 256kx8 mask ROM (QFP52) (Fluke: 6F33)
Memory Area:gfx4
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288ls-11.2lCRC(6bf81c64),NEC 23C4000 512kx8 mask ROM (QFP64) (Fluke: 18B2)
0x0000-0x7FFFF524288ls-11.2lCRC(6bf81c64),NEC 23C4000 512kx8 mask ROM (QFP64) (Fluke: 18B2)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072ls-06.10eCRC(88d39a5b) (Fluke: 4803)
0x0000-0x1FFFF131072ls-06.10eCRC(88d39a5b) (Fluke: 4803)
0x20000-0x3FFFF131072ls-05.12eCRC(b06e03b5) (Fluke: BA4E)
0x20000-0x3FFFF131072ls-05.12eCRC(b06e03b5) (Fluke: BA4E)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF25629.14kCRC(7f862e1e),priority (not used) BPROM type 63S141 or compatible like 82S129A (Fluke: 77F3)
0x0000-0x00FF25629.14kCRC(7f862e1e),priority (not used) BPROM type 63S141 or compatible like 82S129A (Fluke: 77F3)
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