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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.
Squash (Gaelco, 1992)
Memory Area:squash_map
Address RangeLengthFunctionDescription
0x0000-0xFFFFF1048576ROM(/* ROM */)
0x100000-0x101FFF8192RAM Write, Sharedgaelco_vram_encrypted_w, videoram (/* Video RAM */)
0x102000-0x103FFF8192RAM Write, Sharedgaelco_encrypted_w, screenram (/* Screen RAM */)
0x108000-0x1080078Write Only, Sharedvregs (/* Video Registers */)
0x200000-0x2007FF2048RAM Device Write, Sharedpalette, palette_device, write, palette (/* Palette */)
0x440000-0x440FFF4096RAM, Sharedspriteram (/* Sprite RAM */)
0x700000-0x7000012Read PortDSW2
0x0003DifficultyActive High
0x0002EasyActive High
0x0003NormalActive High
0x0001HardActive High
0x0000HardestActive High
0x00084Active High
0x000c5Active High
0x00046Active High
0x00007Active High
0x0010UnknownActive High
0x0010OffActive High
0x0000OnActive High
0x0020Demo_SoundsActive High
0x0020OffActive High
0x0000OnActive High
0x0040UnusedActive High
0x0040OffActive High
0x0000OnActive High
0x700002-0x7000032Read PortDSW1
0x700004-0x7000052Read PortP1
0x700006-0x7000072Read PortP2
0x70000C-0x70000D2WriteOKIM6295_bankswitch_w (/* OKI6295 bankswitch */)
0x70000E-0x70000F2Device Read/Write 8-bitoki, okim6295_device, read, write, 0x00ff (/* OKI6295 status register */)
0xFF0000-0xFFFFFF65536RAM(/* Work RAM */)
 

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
0x0000-0x7FFFF524288squash.c12CRC(5c440645),encrypted video ram (Fluke: 0AF9)
0x100000-0x17FFFF524288squash.c11CRC(9e19694d),encrypted video ram (Fluke: B0F0)
0x200000-0x27FFFF524288squash.c10CRC(892a035c),encrypted video ram (Fluke: 4ADF)
0x300000-0x37FFFF524288squash.c09CRC(0bb91c69),encrypted video ram (Fluke: 5519)
Memory Area:oki
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288squash.d01CRC(a1b9651b) (Fluke: EEAA)
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