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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.
Starship 1 (Atari, 1977)
Memory Area:starshp1_map
Address RangeLengthFunctionDescription
0x0000-0x00FF256RAM, Mirror0x100
0x2C00-0x3FFF5120ROM
0xA0001Read PortSYSTEM
0x0001Button 1Active Low
0x0002UnknownActive Low
0x0004Button 2Active Low
0x0008Start 1Active Low
0x0010Coin 2Active Low
0x0000NoActive High
0x0020YesActive High
0x0040Button 3Active Low
0x0080Coin 1Active Low
0xB0001Read PortVBLANK
0x003fSpecialActive High
0x0080CustomActive High
0xC300-0xC3FF256Writestarshp1_sspic_w (/* spaceship picture */)
0xC400-0xC4FF256Writestarshp1_ssadd_w (/* spaceship address */)
0xC4001Read PortCOINAGE
0x000fSpecialActive High
0x00102C_1CActive High
0x00201C_1CActive High
0x00401C_2CActive High
0x0080UnusedActive High
0xC800-0xC9FF512RAM Write, Sharedstarshp1_playfield_w, playfield_ram
0xCC00-0xCC0F16Write Only, Sharedhpos_ram
0xD000-0xD00F16Write Only, Sharedvpos_ram
0xD400-0xD40F16Write Only, Sharedobj_ram
0xD800-0xD80F16Writestarshp1_collision_reset_w
0xD8001Readstarshp1_rng_r
0xDC00-0xDC0F16Writestarshp1_misc_w
0xDD00-0xDD0F16Writestarshp1_analog_in_w
0xDE00-0xDE0F16Writestarshp1_audio_w
0xDF00-0xDF0F16Writestarshp1_analog_out_w
0xF000-0xFFFF4096ROM
 

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
0x0000-0x03FF10247513-01.n7CRC(8fb0045d) (Fluke: 1F94)
0x0000-0x03FF10247513-01.n7CRC(8fb0045d) (Fluke: 1F94)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF2567515-01.j5CRC(fcbcbf2e) (Fluke: 74B8)
0x0000-0x00FF2567515-01.j5CRC(fcbcbf2e) (Fluke: 74B8)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF10247517-01.r1CRC(1531f85f) (Fluke: 9865)
0x0000-0x03FF10247517-01.r1CRC(1531f85f) (Fluke: 9865)
0x0400-0x07FF10247516-01.p1CRC(64fbfe4c) (Fluke: 5F73)
0x0400-0x07FF10247516-01.p1CRC(64fbfe4c) (Fluke: 5F73)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x3000-0x37FF20487530-02.h3CRC(4b2d466c) (Fluke: EC85)
0x3800-0x3FFF20487531-02.e3CRC(b35b2c0e) (Fluke: 4C5A)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF2567518-01.r10CRC(80877f7e),video output (Fluke: A4DE)
0x0000-0x00FF2567518-01.r10CRC(80877f7e),video output (Fluke: A4DE)
0x0100-0x01FF2567514-01.n9CRC(3610b453),sync (Fluke: 4A1E)
0x0100-0x01FF2567514-01.n9CRC(3610b453),sync (Fluke: 4A1E)
0x0200-0x021F327519-01.b5CRC(23b9cd3c),address (Fluke: AE68)
0x0200-0x021F327519-01.b5CRC(23b9cd3c),address (Fluke: AE68)
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