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.
Memory Area:spacewin_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM
0x100000-0x100FFF4096RAM Write, Sharedsderby_videoram_w, videoram (/* bg */)
0x101000-0x101FFF4096RAM Write, Sharedsderby_md_videoram_w, md_videoram (/* mid */)
0x102000-0x103FFF8192RAM Write, Sharedsderby_fg_videoram_w, fg_videoram (/* fg */)
0x104000-0x10400B12Writesderby_scroll_w (/* tilemaps offset control */)
0x10400C-0x10400D2Write NOP(/* seems another video register. constantly used */)
0x10400E-0x10400F2Write NOP(/* seems another video register. constantly used */)
0x104010-0x105FFF8176Write NOP(/* unknown */)
0x300000-0x3000012Write NOP(/* unknown... write 0x01 in game, and 0x00 on reset */)
0x308000-0x30800D14Readsderby_input_r
0x308008-0x3080092Writescmatto_out_w (/* output port */)
0x30800E-0x30800F2Device Read/Write 8-bitoki, okim6295_device, read, write, 0x00ff
0x380000-0x380FFF4096Device Write, Sharedpalette, palette_device, write, palette
0x800000-0x800FFF4096RAM, Sharedspriteram
0x801000-0x80100D14Write NOP(/* unknown */)
0x8F0000-0x8F07FF2048RAM, Sharednvram (/* 16K Dallas DS1220Y-200 NVRAM */)
0x8FC000-0x8FFFFF16384RAM
0xD00000-0xD001FF512RAM
 

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
0x0000-0x1FFFF1310724.u141CRC(ce20c599) (Fluke: CAE0)
0x20000-0x3FFFF1310725.u142CRC(ae4f8e06) (Fluke: 1394)
0x40000-0x5FFFF1310726.u143CRC(b99afc96) (Fluke: A68C)
0x60000-0x7FFFF1310727.u144CRC(30f212ad) (Fluke: FF9B)
0x80000-0x9FFFF1310728.u145CRC(541a73fd) (Fluke: 5D4E)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF2621441.u147CRC(eedc7090) (Fluke: B124)
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