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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.
Space Intruder (Shoei, 1980)
Memory Area:spaceint_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x2000-0x23FF1024RAM
0x4000-0x5FFF8192RAM Write, Sharedspaceint_videoram_w, videoram
Memory Area:spaceint_portmap
Address RangeLengthFunctionDescription
0x00001Read PortIN0
0x0001Start 1Active High
0x0002Start 2Active High
0x0004Joystick RightActive High
0x0008Joystick LeftActive High
0x0010Button 1Active High
0x0020Joystick RightActive High
0x0040Joystick LeftActive High
0x0080Button 1Active High
0x00011Read PortIN1
0x00003Active High
0x00044Active High
0x00025Active High
0x00065Active High
0x00001C_1CActive High
0x00081C_2CActive High
0x00021Writespaceint_sound1_w
0x00031Writecolor_latch_w
0x00041Writespaceint_sound2_w
 

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
0x0000-0x03FF10241CRC(184314d2) (Fluke: 0F39)
0x0400-0x07FF10242CRC(55459aa1) (Fluke: 5FA7)
0x0800-0x0BFF10243CRC(9d6819be) (Fluke: 501B)
0x0C00-0x0FFF10244CRC(432052d4) (Fluke: AAEE)
0x1000-0x13FF10245CRC(c6cfa650) (Fluke: 431C)
0x1400-0x17FF10246CRC(c7ccf40f) (Fluke: D935)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256clrCRC(13c1803f) (Fluke: 4311)
0x0000-0x00FF256clrCRC(13c1803f) (Fluke: 4311)
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