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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.
Altered Beast (bootleg (Datsu), 1988)
Memory Area:tetrisbl_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM
0x400000-0x40FFFF65536RAM Write, Sharedsys16_tileram_w, tileram
0x410000-0x410FFF4096RAM Write, Sharedsys16_textram_w, textram
0x418000-0x4180012Writes16bl_fgscrolly_w
0x418008-0x4180092Writes16bl_fgscrollx_w
0x418010-0x4180112Writes16bl_bgscrolly_w
0x418018-0x4180192Writes16bl_bgscrollx_w
0x418020-0x4180212Writes16bl_fgpage_w
0x418028-0x4180292Writes16bl_bgpage_w
0x440000-0x440FFF4096RAM, Sharedsprites
0x840000-0x840FFF4096RAM Write, Sharedpaletteram_w, paletteram
0xC40000-0xC400012Writesys16_coinctrl_w
0xC41000-0xC410012Read PortSERVICE
0xC41002-0xC410032Read PortP1
0xC41006-0xC410072Read PortP2
0xC42000-0xC420012Read PortDSW2
0xC42002-0xC420032Read PortDSW1
0xC42006-0xC420072Writesound_command_irq_w
0xC43034-0xC430352Write NOP
0xC80000-0xC800012Read/Write NOP
0xFFC000-0xFFFFFF16384RAM(// 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
0x0000-0xFFFF6553612.binCRC(a4967d10)
0x10000-0x1FFFF6553611.binCRC(021e82ab)
0x20000-0x2FFFF6553610.binCRC(1a26cf3f)
0x30000-0x3FFFF655369.binCRC(277ef086)
0x40000-0x4FFFF655368.binCRC(661225af)
0x50000-0x5FFFF655367.binCRC(d7019da7)
Memory Area:soundcpu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF655361.binCRC(67e09da3)
0x10000-0x1FFFF655362.binCRC(7c653d8b)
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