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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.
Alien Command (Jaleco, 1994)
Memory Area:acommand_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM
0x82000-0x820056Writeac_bgscroll_w
0x82100-0x821056Writeac_txscroll_w
0x82208-0x822092Writeac_unk2_w
0xA0000-0xA3FFF16384RAM Write, Sharedac_bgvram_w, ac_bgvram
0xB0000-0xB3FFF16384RAM Write, Sharedac_txvram_w, ac_txvram
0xB8000-0xBFFFF32768RAM Device Write, Sharedpalette, palette_device, write, palette
0xF0000-0xF7FFF32768RAM
0xF8000-0xF8FFF4096RAM, Sharedspriteram
0xF9000-0xFFFFF28672RAM
0x100000-0x1000FF256Read, Write, Sharedac_devices_r, ac_devices_w, ac_devram
 

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
0x0000-0x1FFFF131072jalcf6.binCRC(442173d6) (Fluke: D02D)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288jalcf5.binCRC(ff0be97f) (Fluke: A23E)
Memory Area:oki1
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFFF1048576jalcf2.binCRC(b982fd97) (Fluke: 3514)
Memory Area:oki2
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFFF1048576jalcf1.binCRC(24af21d3) (Fluke: 78D6)
Memory Area:user1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF524288jalmr14.binCRC(9d428fb7) (Fluke: 08D2)
0x80000-0xFFFFF524288jalmr17.binCRC(9d428fb7) (Fluke: 08D2)
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