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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.
Super Derby (Playmark, 1996)
Memory Area:sderby_map
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM
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
0x10400C-0x10400D2Write NOP(/* ??? - check code at 0x000456 (executed once at startup) */)
0x10400E-0x10400F2Write NOP(/* ??? - check code at 0x000524 (executed once at startup) */)
0x200000-0x200FFF4096RAM, Sharedspriteram
0x308000-0x30800D14Readsderby_input_r
0x308008-0x3080092Writesderby_out_w (/* output port */)
0x30800E-0x30800F2Device Read/Write 8-bitoki, okim6295_device, read, write, 0x00ff
0x380000-0x380FFF4096Device Write, Sharedpalette, palette_device, write, palette
0x500000-0x5000012Write NOP(/* unknown... write 0x01 in game, and 0x00 on reset */)
0xD00000-0xD007FF2048RAM, Sharednvram
0xFFC000-0xFFFFFF16384RAM
 

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
0x0000-0x1FFFF13107224.binCRC(93c917df) (Fluke: CFB5)
0x20000-0x3FFFF13107225.binCRC(7ba485cd) (Fluke: 52DF)
0x40000-0x5FFFF13107226.binCRC(beabe4f7) (Fluke: C66A)
0x60000-0x7FFFF13107227.binCRC(672ce5df) (Fluke: 818B)
0x80000-0x9FFFF13107228.binCRC(39ca3b52) (Fluke: AD00)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF52428821.binCRC(6f9f2f2b) (Fluke: B2EF)
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