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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.
Double Dragon 3 - The Rosetta Stone (bootleg, 1990)
Memory Area:dd3b_map
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM
0x80000-0x80FFF4096RAM Write, Sharedddragon3_fg_videoram_w, fg_videoram (/* Foreground (32x32 Tiles - 4 by per tile) */)
0x81000-0x81FFF4096RAM, Sharedspriteram
0x82000-0x827FF2048RAM Write, Sharedddragon3_bg_videoram_w, bg_videoram (/* Background (32x32 Tiles - 2 by per tile) */)
0xC0000-0xC000F16Writeddragon3_scroll_w
0x100000-0x1005FF1536RAM Device Write, Sharedpalette, palette_device, write, palette (/* Palette RAM */)
0x140000-0x14000F16Writeddragon3_io_w
0x180000-0x1800012Read PortIN0
0x180002-0x1800032Read PortIN1
0x180004-0x1800052Read PortIN2
0x180006-0x1800072Read PortIN3
0x1C0000-0x1C3FFF16384RAM(/* working RAM */)
Memory Area:ddragon3_map
Address RangeLengthFunctionDescription
0x0000-0x7FFFF524288ROM
0x80000-0x80FFF4096RAM Write, Sharedddragon3_fg_videoram_w, fg_videoram (/* Foreground (32x32 Tiles - 4 by per tile) */)
0x82000-0x827FF2048RAM Write, Sharedddragon3_bg_videoram_w, bg_videoram (/* Background (32x32 Tiles - 2 by per tile) */)
0xC0000-0xC000F16Writeddragon3_scroll_w
0x100000-0x1000012Read PortP1_P2
0x100000-0x10000F16Writeddragon3_io_w
0x100002-0x1000032Read PortSYSTEM
0x100004-0x1000052Read PortDSW
0x100006-0x1000072Read PortP3
0x140000-0x1405FF1536RAM Device Write, Sharedpalette, palette_device, write, palette (/* Palette RAM */)
0x180000-0x180FFF4096RAM, Sharedspriteram
0x1C0000-0x1C3FFF16384RAM(/* working RAM */)
Memory Area:sound_map
Address RangeLengthFunctionDescription
0x0000-0xBFFF49152ROM
0xC000-0xC7FF2048RAM
0xC800-0xC8012Device Read/Writeym2151, ym2151_device, read, write
0xD8001Device Read/Writeoki, okim6295_device, read, write
0xE0001Device Readsoundlatch, generic_latch_8_device, read
0xE8001Writeoki_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
0x0000-0xFFFF65536dd3.06CRC(1e974d9b) (Fluke: 482B)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF131072dd3.3eCRC(726c49b7) (Fluke: B09B)
0x20000-0x3FFFF131072dd3.3dCRC(37a1c335) (Fluke: DAB0)
0x40000-0x5FFFF131072dd3.3cCRC(2bcfe63c) (Fluke: 06F7)
0x60000-0x7FFFF131072dd3.3bCRC(b864cf17) (Fluke: E6E6)
0x80000-0x8FFFF65536dd3.3aCRC(20d64bea) (Fluke: 837A)
0x100000-0x11FFFF131072dd3.2eCRC(8c71eb06) (Fluke: 2DF9)
0x120000-0x13FFFF131072dd3.2dCRC(3e134be9) (Fluke: 795E)
0x140000-0x15FFFF131072dd3.2cCRC(b4115ef0) (Fluke: F303)
0x160000-0x17FFFF131072dd3.2bCRC(4639333d) (Fluke: F24C)
0x180000-0x18FFFF65536dd3.2aCRC(785d71b0) (Fluke: 160A)
0x200000-0x21FFFF131072dd3.1eCRC(04420cc8) (Fluke: 9F0A)
0x220000-0x23FFFF131072dd3.1dCRC(33f97b2f) (Fluke: A6F9)
0x240000-0x25FFFF131072dd3.1cCRC(0f9a8f2a) (Fluke: 42F2)
0x260000-0x27FFFF131072dd3.1bCRC(15c91772) (Fluke: 3699)
0x280000-0x28FFFF65536dd3.1aCRC(15e43d12) (Fluke: BAC2)
0x300000-0x31FFFF131072dd3.0eCRC(894734b3) (Fluke: A70A)
0x320000-0x33FFFF131072dd3.0dCRC(cd504584) (Fluke: 485B)
0x340000-0x35FFFF131072dd3.0cCRC(38e8a9ad) (Fluke: B3FF)
0x360000-0x37FFFF131072dd3.0bCRC(80c1cb74) (Fluke: 349E)
0x380000-0x38FFFF65536dd3.0aCRC(5a47e7a4) (Fluke: 2B64)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFFF262144dd3.j7CRC(3af21dbe) (Fluke: 9620)
0x40000-0x7FFFF262144dd3.j8CRC(c28b53cd) (Fluke: 7BF4)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256mb7114h.38CRC(113c7443) (Fluke: 7E45)
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