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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 Demon (Nintendo (Fortrek license), 1980)
Memory Area:spacefb_audio_io_map
Address RangeLengthFunctionDescription
0x00001Readaudio_t0_r
0x00001Readaudio_t1_r
0x00001Device Writedac, dac_byte_interface, write
0x00001Readaudio_p2_r
Memory Area:spacefb_audio_map
Address RangeLengthFunctionDescription
0x0000-0x03FF1024ROM
Memory Area:spacefb_main_io_map
Address RangeLengthFunctionDescription
0x00001Read PortP1
0x00001Mirror, Write0x04, port_0_w
0x00011Mirror, Write0x04, port_1_w
0x00011Read PortP2
0x00021Mirror, Write0x04, port_2_w
0x00021Read PortSYSTEM
0x00031Mirror, Write NOP0x04,
0x00031Read PortDSW
0x0004-0x00074Read NOP(/* yes, this is correct (1-of-8 decoder) */)
Memory Area:spacefb_main_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384ROM
0x4000-0x7FFF16384Read/Write NOP
0x8000-0x83FF1024Mirror, RAM, Shared0x3c00, , videoram
0xC000-0xC7FF2048Mirror, RAM0x3000,
0xC800-0xCFFF2048Mirror, Read/Write NOP0x3000,
 

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:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF1024sdm-e-20CRC(55f40a0b) (Fluke: B61B)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048sdm-v-5kCRC(55758e4d) (Fluke: FEC0)
0x0800-0x0FFF2048sdm-v-6kCRC(3fcbb20c) (Fluke: E3B2)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF2564i.vidCRC(528e8533) (Fluke: 964B)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048sdm-c-5eCRC(be4b9cbb) (Fluke: FF6F)
0x0800-0x0FFF2048sdm-c-5fCRC(0814f964) (Fluke: 846C)
0x1000-0x17FF2048sdm-c-5hCRC(ebfff682) (Fluke: BE8D)
0x1800-0x1FFF2048sdm-c-5iCRC(dd7e1378) (Fluke: F38A)
0x2000-0x27FF2048sdm-c-5jCRC(98334fda) (Fluke: 5C47)
0x2800-0x2FFF2048sdm-c-5kCRC(ba4933b2) (Fluke: 20A8)
0x3000-0x37FF2048sdm-c-5mCRC(14d3c656) (Fluke: 7B6A)
0x3800-0x3FFF2048sdm-c-5nCRC(7e0e41b0) (Fluke: 321A)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32sdm-v-3nCRC(6d8ad169) (Fluke: 491A)
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