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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.
Diamond Run (KH Video, 1989)
Memory Area:gng_map
Address RangeLengthFunctionDescription
0x0000-0x1DFF7680RAM
0x1E00-0x1FFF512RAM, Sharedspriteram
0x2000-0x27FF2048RAM Write, Sharedgng_fgvideoram_w, fgvideoram
0x2800-0x2FFF2048RAM Write, Sharedgng_bgvideoram_w, bgvideoram
0x30001Read PortSYSTEM
0x0001Start 1Active Low
0x0002Start 2Active Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040Coin 1Active Low
0x0080Coin 2Active Low
0x30011Read PortP1
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x30021Read PortP2
0x0001UnknownActive Low
0x0002UnknownActive Low
0x0004UnknownActive Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x30031Read PortDSW1
0x00002Active High
0x00013Active High
0x00024Active High
0x00035Active High
0x0000*1Active High
0x0004*2Active High
0x0008*3Active High
0x000c*4Active High
0x00304C_1CActive High
0x00203C_1CActive High
0x00102C_1CActive High
0x00001C_1CActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0x30041Read PortDSW2
0x0000SlowestActive High
0x0001-6 SlowerActive High
0x0002-5 SlowerActive High
0x0003-4 SlowerActive High
0x0004-3 SlowerActive High
0x0005-2 SlowerActive High
0x0006-1 SlowerActive High
0x0007NormalActive High
0x0008+1 FasterActive High
0x0009+2 FasterActive High
0x000a+3 FasterActive High
0x000b+4 FasterActive High
0x000c+5 FasterActive High
0x000d+6 FasterActive High
0x000e+7 FasterActive High
0x000fFastestActive High
0x0000*1Active High
0x0010*2Active High
0x0020*3Active High
0x0030*4Active High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0x3800-0x38FF256Device Write, Sharedpalette, palette_device, write_ext, palette_ext
0x3900-0x39FF256Device Write, Sharedpalette, palette_device, write, palette
0x3A001Device Writesoundlatch, generic_latch_8_device, write
0x3B08-0x3B092Writegng_bgscrollx_w
0x3B0A-0x3B0B2Writegng_bgscrolly_w
0x3C001Read/Write NOP(/* watchdog? */)
0x3D001Writegng_flipscreen_w
0x3D02-0x3D032Writegng_coin_counter_w
0x3E001Writegng_bankswitch_w
0x4000-0x5FFF8192ROM Bankbank1
0x6000-0xFFFF40960ROM
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0xC000-0xC7FF2048RAM
0xC8001Device Readsoundlatch, generic_latch_8_device, read
0xE000-0xE0012Device Writeym1, ym2203_device, write
0xE002-0xE0032Device Writeym2, ym2203_device, write
 

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
0x0000-0x7FFF32768d2CRC(615f5b6f) (Fluke: 4CE3)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384d1CRC(3a24e504),characters (Fluke: 25CB)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384d11CRC(754357d7),tiles 0-1 Plane 1 (Fluke: C769)
0x4000-0x7FFF16384d10CRC(7531edcd),tiles 2-3 Plane 1 (Fluke: 7913)
0x8000-0xBFFF16384d9CRC(22eeca08),tiles 0-1 Plane 2 (Fluke: A58E)
0xC000-0xFFFF16384d8CRC(6b61be60),tiles 2-3 Plane 2 (Fluke: 2549)
0x10000-0x13FFF16384d7CRC(fd595274),tiles 0-1 Plane 3 (Fluke: C72E)
0x14000-0x17FFF16384d6CRC(7f51dcd2),tiles 2-3 Plane 3 (Fluke: 2B27)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384d17CRC(8164b005),sprites 0 Plane 1-2 (Fluke: E996)
0x10000-0x13FFF16384d14CRC(6f132163),sprites 0 Plane 3-4 (Fluke: 442D)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x4000-0x7FFF16384d3oCRC(ba4bf9f1),4000-5fff is page 4 (Fluke: 6582)
0x8000-0xFFFF32768d3CRC(f436d6fa) (Fluke: 1EF7)
0x18000-0x1FFFF32768d5CRC(453f3f9e),is this supposed to be used? (Fluke: 534D)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256prom1CRC(0eaf5158),video timing (not used) (Fluke: E9D9)
0x0100-0x01FF256prom2CRC(4a1285a4),priority (not used) (Fluke: F05F)
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