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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.
Grand Tour (IGS, 1993)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0xEFFF61440ROM
0xF000-0xFFFF4096RAM, Sharedrambase
Memory Area:main_portmap
Address RangeLengthFunctionDescription
0x2000-0x23FF1024Device Write, Sharedpalette, palette_device, write, palette
0x2800-0x2BFF1024Device Write, Sharedpalette, palette_device, write_ext, palette_ext
0x5080-0x50834Device Read/Writeppi8255, i8255_device, read, write
0x50901Read PortSW0
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x00004C_1CActive High
0x00043C_1CActive High
0x00082C_1CActive High
0x001c1C_1CActive High
0x00181C_2CActive High
0x00141C_3CActive High
0x00101C_4CActive High
0x000c1C_6CActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0000NoActive High
0x0080YesActive High
0x50A01Read PortSW1
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x00c0OffActive High
0x0080Background TestActive High
0x0040Input TestActive High
0x0000Level Test / Debug Mode (use 5 above switches)Active High
0x50B0-0x50B12Device Writeymsnd, ym2413_device, write (// UM3567_data_port_0_w)
0x50C01Writeirqack_w
0x6000-0x603F64Writefgscroll_w
0x6800-0x69FF512Write, Sharedfgvideoram_w, fgvideoram (/* initialized up to 6fff... bug or larger tilemap? */)
0x7000-0x7FFF4096RAM Write, Sharedbgvideoram_w, bgvideoram
0x8000-0xFFFF32768ROM, Regionuser1, 0
 

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
0x0000-0x3FFFF262144grand1.u28CRC(de85c664) (Fluke: 2F2F)
0x40000-0x7FFFF262144grand2.u27CRC(8456204e) (Fluke: 539E)
0x80000-0xBFFFF262144grand3.u26CRC(77632917) (Fluke: 20DA)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x3FFF16384grand4.u25CRC(48d09746) (Fluke: 9512)
0x4000-0x7FFF16384grand5.u24CRC(f896efb2) (Fluke: 4E9D)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536grand7.u7CRC(95cac31e) (Fluke: 123B)
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