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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 Crasher (SNK, 1984)
Memory Area:madcrash_cpuA_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x80001Read PortIN0
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0008Start 1Active Low
0x0010Start 2Active Low
0x0020SpecialActive High
0x0040SpecialActive High
0x0080ServiceActive Low
0x81001Read PortIN1
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 2Active Low
0x0020Button 1Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x82001Read PortIN2
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 2Active Low
0x0020Button 1Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x83001Writemarvins_soundlatch_w
0x84001Read PortDSW1
0x0002CabinetActive High
0x0000UprightActive High
0x0002CocktailActive High
0x0004LivesActive High
0x00043Active High
0x00005Active High
0x0038CoinageActive High
0x00085C_1CActive High
0x00105C_1CActive High
0x00203C_1CActive High
0x00182C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x0000Free_PlayActive High
0x00c0Bonus_LifeActive High
0x00c020000 60000Active High
0x008040000 90000Active High
0x004050000 120000Active High
0x0000NoneActive High
0x85001Read PortDSW2
0x00011st, 2nd, then every 2ndActive High
0x00001st and 2nd onlyActive High
0x0004NormalActive High
0x0000FasterActive High
0x0018Demo Sounds OffActive High
0x0010Demo Sounds OnActive High
0x0000FreezeActive High
0x0008Infinite Lives (Cheat)Active High
0x0020Flip_ScreenActive High
0x0020OffActive High
0x0000OnActive High
0x0040DifficultyActive High
0x0040EasyActive High
0x0000HardActive High
0x86001Mirror, Write0xff, marvins_flipscreen_w
0x87001Read/Writesnk_cpuB_nmi_trigger_r, snk_cpuA_nmi_ack_w
0xC000-0xC7FF2048RAM, Sharedspriteram (// + work ram)
0xC8001Mirror, Write0xff, marvins_palette_bank_w
0xD000-0xD7FF2048RAM Write, Sharedmarvins_bg_videoram_w, bg_videoram
0xD800-0xDFFF2048RAM, Sharedshare3
0xE000-0xE7FF2048RAM Write, Sharedmarvins_fg_videoram_w, fg_videoram
0xE800-0xEFFF2048RAM, Sharedshare5
0xF000-0xF7FF2048RAM Write, Sharedsnk_tx_videoram_w, tx_videoram (// + work RAM)
0xF8001Mirror, Write0xff, snk_bg_scrolly_w
0xF9001Mirror, Write0xff, snk_bg_scrollx_w
0xFA001Mirror, Write0xff, snk_sprite_split_point_w
0xFB001Mirror, Write0xff, marvins_scroll_msb_w
0xFC001Mirror, Write0xff, snk_sp16_scrolly_w
0xFD001Mirror, Write0xff, snk_sp16_scrollx_w
0xFE001Mirror, Write0xff, snk_fg_scrolly_w
0xFF001Mirror, Write0xff, snk_fg_scrollx_w
Memory Area:madcrash_cpuB_map
Address RangeLengthFunctionDescription
0x0000-0x9FFF40960ROM
0x87001Writesnk_cpuB_nmi_ack_w (// vangrd2)
0xA0001Writesnk_cpuB_nmi_ack_w (// madcrash)
0xC000-0xC7FF2048RAM Write, Sharedmarvins_fg_videoram_w, fg_videoram
0xC800-0xCFFF2048RAM, Sharedshare5
0xD000-0xD7FF2048RAM Write, Sharedsnk_tx_videoram_w, tx_videoram
0xD8001Writesnk_bg_scrolly_w
0xD9001Writesnk_bg_scrollx_w
0xDA001Writesnk_sprite_split_point_w
0xDB001Writemarvins_scroll_msb_w
0xDC001Writesnk_sp16_scrolly_w
0xDD001Writesnk_sp16_scrollx_w
0xDE001Writesnk_fg_scrolly_w
0xDF001Writesnk_fg_scrollx_w
0xE000-0xE7FF2048RAM, Sharedspriteram
0xF000-0xF7FF2048RAM Write, Sharedmarvins_bg_videoram_w, bg_videoram
0xF800-0xFFFF2048RAM, Sharedshare3
Memory Area:marvins_cpuA_map
Address RangeLengthFunctionDescription
0x0000-0x5FFF24576ROM
0x60001Writemarvins_palette_bank_w
0x80001Read PortIN0
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0008Start 1Active Low
0x0010Start 2Active Low
0x0020SpecialActive High
0x0040SpecialActive High
0x0080ServiceActive Low
0x81001Read PortIN1
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 2Active Low
0x0020Button 1Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x82001Read PortIN2
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 2Active Low
0x0020Button 1Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x83001Writemarvins_soundlatch_w
0x84001Read PortDSW1
0x0002CabinetActive High
0x0000UprightActive High
0x0002CocktailActive High
0x0004LivesActive High
0x00043Active High
0x00005Active High
0x0038CoinageActive High
0x00085C_1CActive High
0x00105C_1CActive High
0x00203C_1CActive High
0x00182C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x0000Free_PlayActive High
0x00c0Bonus_LifeActive High
0x00c020000 60000Active High
0x008040000 90000Active High
0x004050000 120000Active High
0x0000NoneActive High
0x85001Read PortDSW2
0x00011st, 2nd, then every 2ndActive High
0x00001st and 2nd onlyActive High
0x0004NormalActive High
0x0000FasterActive High
0x0018Demo Sounds OffActive High
0x0010Demo Sounds OnActive High
0x0000FreezeActive High
0x0008Infinite Lives (Cheat)Active High
0x0020Flip_ScreenActive High
0x0020OffActive High
0x0000OnActive High
0x0040DifficultyActive High
0x0040EasyActive High
0x0000HardActive High
0x86001Writemarvins_flipscreen_w
0x87001Read/Writesnk_cpuB_nmi_trigger_r, snk_cpuA_nmi_ack_w
0xC000-0xCFFF4096RAM, Sharedspriteram (// + work ram)
0xD000-0xD7FF2048RAM Write, Sharedmarvins_fg_videoram_w, fg_videoram
0xD800-0xDFFF2048RAM, Sharedshare3
0xE000-0xE7FF2048RAM Write, Sharedmarvins_bg_videoram_w, bg_videoram
0xE800-0xEFFF2048RAM, Sharedshare5
0xF000-0xF7FF2048RAM Write, Sharedsnk_tx_videoram_w, tx_videoram (// + work RAM)
0xF8001Writesnk_sp16_scrolly_w
0xF9001Writesnk_sp16_scrollx_w
0xFA001Writesnk_fg_scrolly_w
0xFB001Writesnk_fg_scrollx_w
0xFC001Writesnk_bg_scrolly_w
0xFD001Writesnk_bg_scrollx_w
0xFE001Writesnk_sprite_split_point_w
0xFF001Writemarvins_scroll_msb_w
Memory Area:marvins_cpuB_map
Address RangeLengthFunctionDescription
0x0000-0x5FFF24576ROM
0x87001Read/Writesnk_cpuA_nmi_trigger_r, snk_cpuB_nmi_ack_w
0xC000-0xCFFF4096RAM, Sharedspriteram
0xD000-0xD7FF2048RAM Write, Sharedmarvins_fg_videoram_w, fg_videoram
0xD800-0xDFFF2048RAM, Sharedshare3
0xE000-0xE7FF2048RAM Write, Sharedmarvins_bg_videoram_w, bg_videoram
0xE800-0xEFFF2048RAM, Sharedshare5
0xF000-0xF7FF2048RAM Write, Sharedsnk_tx_videoram_w, tx_videoram
0xF8001Writesnk_sp16_scrolly_w
0xF9001Writesnk_sp16_scrollx_w
0xFA001Writesnk_fg_scrolly_w
0xFB001Writesnk_fg_scrollx_w
0xFC001Writesnk_bg_scrolly_w
0xFD001Writesnk_bg_scrollx_w
0xFE001Writesnk_sprite_split_point_w
0xFF001Writemarvins_scroll_msb_w
Memory Area:marvins_sound_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x40001Readmarvins_soundlatch_r
0x8000-0x80012Device Writeay1, ay8910_device, address_data_w
0x8002-0x80076Device Writewave, snkwave_device, snkwave_w
0x8008-0x80092Device Writeay2, ay8910_device, address_data_w
0xA0001Readmarvins_sound_nmi_ack_r
0xE000-0xE7FF2048RAM
Memory Area:marvins_sound_portmap
Address RangeLengthFunctionDescription
0x00001Read NOP(// read on startup, then the Z80 automatically pulls down the IORQ pin to ack irq)
 

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
0x0000-0x1FFF8192p1CRC(2dcd036d) (Fluke: 396B)
0x2000-0x3FFF8192p2CRC(cc30ae8b) (Fluke: A46C)
Memory Area:bg_tiles
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192p12CRC(085094c1) (Fluke: 0E38)
Memory Area:fg_tiles
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192p11CRC(67174956) (Fluke: 98F5)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192p8CRC(ecb2fdc9) (Fluke: F0A3)
0x2000-0x3FFF8192p9CRC(0a87df26) (Fluke: 5A5E)
0x4000-0x5FFF8192p10CRC(6eb8a87c) (Fluke: 3E77)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF1024m3-prom.j3CRC(d19e8a91) (Fluke: D51E)
0x0400-0x07FF1024m2-prom.j4CRC(9fc325af) (Fluke: 6293)
0x0800-0x0BFF1024m1-prom.j5CRC(07678443) (Fluke: A8B9)
Memory Area:sp16_tiles
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192p16CRC(6153611a) (Fluke: 72D3)
0x2000-0x3FFF8192p15CRC(a74149d4) (Fluke: BA9F)
0x4000-0x5FFF8192p14CRC(07e807bc) (Fluke: E571)
Memory Area:sub
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192p4CRC(5664d699) (Fluke: D6FE)
0x2000-0x3FFF8192p5CRC(dea2865a) (Fluke: D858)
0x4000-0x5FFF8192p6CRC(e25a9b9c) (Fluke: 0866)
0x6000-0x7FFF8192p7CRC(55b14a36) (Fluke: 5277)
0x8000-0x9FFF8192p3CRC(e3c8c2cb) (Fluke: 3426)
Memory Area:tx_tiles
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192p13CRC(48c4ade0) (Fluke: F1E9)
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