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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.
Xybots (Atari Games, 1987)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768Mirror, ROM0x7c0000,
0x8000-0xFFFF32768Mirror, ROM0x7c0000, (/* slapstic maps here */)
0x10000-0x3FFFF196608Mirror, ROM0x7c0000,
0x800000-0x800FFF4096Mirror, RAM Device Write, Shared0x7f8000, alpha, tilemap_device, write, alpha
0x801000-0x802DFF7680Mirror, RAM0x7f8000,
0x802E00-0x802FFF512Mirror, RAM, Shared0x7f8000, , mob
0x803000-0x803FFF4096Mirror, RAM Device Write, Shared0x7f8000, playfield, tilemap_device, write, playfield
0x804000-0x8047FF2048Mirror, RAM Device Write, Shared0x7f8800, palette, palette_device, write, palette
0x805000-0x805FFF4096Mirror, Device Read/Write 8-bit0x7f8000, eeprom, atari_eeprom_device, read, write, 0x00ff
0x806000-0x8060FF256Mirror, Device Read 8-bit0x7f8000, jsa, atari_jsa_i_device, main_response_r, 0x00ff
0x806100-0x8061FF256Mirror, Read Port0x7f8000, FFE100
0x0001Start 2Active Low
0x0002Button 1Active Low
0x0004P2 Twist RightActive Low
0x0008P2 Twist LeftActive Low
0x0010Joystick RightActive Low
0x0020Joystick LeftActive Low
0x0040Joystick DownActive Low
0x0080Joystick UpActive Low
0x0100Start 1Active Low
0x0200Button 1Active Low
0x0400P1 Twist RightActive Low
0x0800P1 Twist LeftActive Low
0x1000Joystick RightActive Low
0x2000Joystick LeftActive Low
0x4000Joystick DownActive Low
0x8000Joystick UpActive Low
0x806200-0x8062FF256Mirror, Read0x7f8000, special_port1_r
0x806800-0x8068FF256Mirror, Device Write0x7f8000, eeprom, atari_eeprom_device, unlock_write
0x806900-0x8069FF256Mirror, Device Write 8-bit0x7f8000, jsa, atari_jsa_i_device, main_command_w, 0x00ff
0x806A00-0x806AFF256Mirror, Device Write0x7f8000, watchdog, watchdog_timer_device, reset16_w
0x806B00-0x806BFF256Mirror, Write0x7f8000, video_int_ack_w
0x806E00-0x806EFF256Mirror, Device Write0x7f8000, jsa, atari_jsa_i_device, sound_reset_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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768136054-2102.12lCRC(c1309674) (Fluke: 4742)
0x0000-0x7FFF32768136054-2102.12lCRC(c1309674) (Fluke: 4742)
0x0000-0x7FFF32768136054-2102.12lCRC(c1309674) (Fluke: 4742)
0x0000-0x7FFF32768136054-2102.12lCRC(c1309674) (Fluke: 4742)
0x10000-0x1FFFF65536136054-2103.11lCRC(907c024d) (Fluke: 3316)
0x10000-0x1FFFF65536136054-2103.11lCRC(907c024d) (Fluke: 3316)
0x10000-0x1FFFF65536136054-2103.11lCRC(907c024d) (Fluke: 3316)
0x10000-0x1FFFF65536136054-2103.11lCRC(907c024d) (Fluke: 3316)
0x30000-0x3FFFF65536136054-2117.8lCRC(0cc9b42d) (Fluke: 2160)
0x30000-0x3FFFF65536136054-2117.8lCRC(0cc9b42d) (Fluke: 2160)
0x30000-0x3FFFF65536136054-2117.8lCRC(0cc9b42d) (Fluke: 2160)
0x30000-0x3FFFF65536136054-2117.8lCRC(0cc9b42d) (Fluke: 2160)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536136054-1105.2eCRC(315a4274) (Fluke: 7E1D)
0x0000-0xFFFF65536136054-1105.2eCRC(315a4274) (Fluke: 7E1D)
0x0000-0xFFFF65536136054-1105.2eCRC(315a4274) (Fluke: 7E1D)
0x0000-0xFFFF65536136054-1105.2eCRC(315a4274) (Fluke: 7E1D)
0x0000-0xFFFF65536136054-1105.2eCRC(315a4274) (Fluke: 7E1D)
0x10000-0x1FFFF65536136054-1106.2efCRC(3d8c1dd2) (Fluke: 47A5)
0x10000-0x1FFFF65536136054-1106.2efCRC(3d8c1dd2) (Fluke: 47A5)
0x10000-0x1FFFF65536136054-1106.2efCRC(3d8c1dd2) (Fluke: 47A5)
0x10000-0x1FFFF65536136054-1106.2efCRC(3d8c1dd2) (Fluke: 47A5)
0x10000-0x1FFFF65536136054-1106.2efCRC(3d8c1dd2) (Fluke: 47A5)
0x20000-0x2FFFF65536136054-1107.2fCRC(b7217da5) (Fluke: 6045)
0x20000-0x2FFFF65536136054-1107.2fCRC(b7217da5) (Fluke: 6045)
0x20000-0x2FFFF65536136054-1107.2fCRC(b7217da5) (Fluke: 6045)
0x20000-0x2FFFF65536136054-1107.2fCRC(b7217da5) (Fluke: 6045)
0x20000-0x2FFFF65536136054-1107.2fCRC(b7217da5) (Fluke: 6045)
0x30000-0x3FFFF65536136054-1108.2fjCRC(77ac65e1) (Fluke: 24D7)
0x30000-0x3FFFF65536136054-1108.2fjCRC(77ac65e1) (Fluke: 24D7)
0x30000-0x3FFFF65536136054-1108.2fjCRC(77ac65e1) (Fluke: 24D7)
0x30000-0x3FFFF65536136054-1108.2fjCRC(77ac65e1) (Fluke: 24D7)
0x30000-0x3FFFF65536136054-1108.2fjCRC(77ac65e1) (Fluke: 24D7)
0x40000-0x4FFFF65536136054-1109.2jkCRC(1b482c53) (Fluke: AB4A)
0x40000-0x4FFFF65536136054-1109.2jkCRC(1b482c53) (Fluke: AB4A)
0x40000-0x4FFFF65536136054-1109.2jkCRC(1b482c53) (Fluke: AB4A)
0x40000-0x4FFFF65536136054-1109.2jkCRC(1b482c53) (Fluke: AB4A)
0x40000-0x4FFFF65536136054-1109.2jkCRC(1b482c53) (Fluke: AB4A)
0x50000-0x5FFFF65536136054-1110.2kCRC(99665ff4) (Fluke: 862A)
0x50000-0x5FFFF65536136054-1110.2kCRC(99665ff4) (Fluke: 862A)
0x50000-0x5FFFF65536136054-1110.2kCRC(99665ff4) (Fluke: 862A)
0x50000-0x5FFFF65536136054-1110.2kCRC(99665ff4) (Fluke: 862A)
0x50000-0x5FFFF65536136054-1110.2kCRC(99665ff4) (Fluke: 862A)
0x60000-0x6FFFF65536136054-1111.2lCRC(416107ee) (Fluke: A594)
0x60000-0x6FFFF65536136054-1111.2lCRC(416107ee) (Fluke: A594)
0x60000-0x6FFFF65536136054-1111.2lCRC(416107ee) (Fluke: A594)
0x60000-0x6FFFF65536136054-1111.2lCRC(416107ee) (Fluke: A594)
0x60000-0x6FFFF65536136054-1111.2lCRC(416107ee) (Fluke: A594)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192136054-1101.5cCRC(59c028a2) (Fluke: 2FFD)
0x0000-0x1FFF8192136054-1101.5cCRC(59c028a2) (Fluke: 2FFD)
0x0000-0x1FFF8192136054-1101.5cCRC(59c028a2) (Fluke: 2FFD)
0x0000-0x1FFF8192136054-1101.5cCRC(59c028a2) (Fluke: 2FFD)
0x0000-0x1FFF8192136054-1101.5cCRC(59c028a2) (Fluke: 2FFD)
Memory Area:jsa:cpu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536136054-1116.2kCRC(3b9f155d) (Fluke: 209D)
0x0000-0xFFFF65536136054-1116.2kCRC(3b9f155d) (Fluke: 209D)
0x0000-0xFFFF65536136054-1116.2kCRC(3b9f155d) (Fluke: 209D)
0x0000-0xFFFF65536136054-1116.2kCRC(3b9f155d) (Fluke: 209D)
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