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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.
Beam Invader (Teknon Kogyo, 1979)
Memory Area:main_io_map
Address RangeLengthFunctionDescription
0x00001Writecontroller_select_w (/* to be confirmed */)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x17FF6144ROM
0x1800-0x1FFF2048RAM
0x24001Mirror, Read Port0x03ff, DSW
0x00003Active High
0x00014Active High
0x00025Active High
0x00036Active High
0x00001000Active High
0x00042000Active High
0x00083000Active High
0x000c4000Active High
0x000049 EnemiesActive High
0x002039 EnemiesActive High
0x004029 EnemiesActive High
0x0060NeverActive High
0x28001Mirror, Read Port0x03ff, INPUTS
0x0001Coin 1Active Low
0x0002Start 1Active Low
0x0004Start 2Active Low
0x0008Button 1Active Low
0x0010Button 1Active Low
0x00e0UnusedActive Low
0x34001Mirror, Read0x03ff, controller_r
0x38001Mirror, Read0x03ff, v128_r
0x4000-0x5FFF8192RAM, Sharedvideoram
 

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:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF10240aCRC(17503086) (Fluke: 0A24)
0x0400-0x07FF10241aCRC(aa9e1666) (Fluke: D1E6)
0x0800-0x0BFF10242aCRC(ebaa2fc8) (Fluke: CE29)
0x0C00-0x0FFF10243aCRC(4f62c2e6) (Fluke: AB75)
0x1000-0x13FF10244aCRC(3eebf757) (Fluke: E2B0)
0x1400-0x17FF10245aCRC(ec08bc1f) (Fluke: BCC9)
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