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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.
Galaxia (Zaccaria / Zelco, 1979)
Memory Area:galaxia_io_map
Address RangeLengthFunctionDescription
0x00001Read/Writegalaxia_collision_clear, galaxia_dataport_w
0x00001Write, Read Portgalaxia_scroll_w, IN0
0x0001Start 1Active High
0x0002Start 2Active High
0x0004Coin 2Active High
0x0008Coin 1Active High
0x0010Button 1Active High
0x0020Button 1Active High
0x00c0UnknownActive High
0x00001Read PortSENSE
0x0080CustomActive High
0x00001Read/Writegalaxia_collision_r, galaxia_ctrlport_w
0x00021Read PortIN1
0x0004Joystick LeftActive High
0x0008Joystick RightActive High
0x0010Joystick LeftActive High
0x0020Joystick RightActive High
0x00c3UnknownActive High
0x00051Read NOP
0x00061Read PortDSW0
0x0000A 1C_1C B 2C_1CActive High
0x0001A 1C_2C B 2C_1CActive High
0x0002A 1C_3C B 2C_1CActive High
0x0003A 1C_5C B 2C_1CActive High
0x0004A 1C_1C B 1C_1CActive High
0x0005A 1C_2C B 1C_1CActive High
0x0006A 1C_3C B 1C_1CActive High
0x0007A 1C_5C B 1C_1CActive High
0x00003Active High
0x00085Active High
0x0000OffActive High
0x0010OnActive High
0x0000OffActive High
0x0020OnActive High
0x0000OffActive High
0x0040OnActive High
0x0000OffActive High
0x0080OnActive High
0x00071Read PortDSW1
0x0000OffActive High
0x0001OnActive High
0x0000OffActive High
0x0002OnActive High
0x0000OffActive High
0x0004OnActive High
0x0000OffActive High
0x0008OnActive High
0x0000OffActive High
0x0010OnActive High
0x0000OffActive High
0x0020OnActive High
0x0000OffActive High
0x0040OnActive High
0x0000OffActive High
0x0080OnActive High
0x00AC1Read NOP
Memory Area:galaxia_mem_map
Address RangeLengthFunctionDescription
0x0000-0x13FF5120ROM
0x1400-0x14FF256Mirror, RAM, Shared0x6000, , bullet_ram
0x1500-0x15FF256Mirror, Device Read/Write0x6000, s2636_0, s2636_device, read_data, write_data
0x1600-0x16FF256Mirror, Device Read/Write0x6000, s2636_1, s2636_device, read_data, write_data
0x1700-0x17FF256Mirror, Device Read/Write0x6000, s2636_2, s2636_device, read_data, write_data
0x1800-0x1BFF1024Mirror, Read, Write, Shared0x6000, cvs_video_or_color_ram_r, galaxia_video_w, video_ram
0x1C00-0x1FFF1024Mirror, RAM0x6000,
0x2000-0x33FF5120ROM
0x72141Read PortIN0
0x0001Start 1Active High
0x0002Start 2Active High
0x0004Coin 2Active High
0x0008Coin 1Active High
0x0010Button 1Active High
0x0020Button 1Active High
0x00c0UnknownActive High
 

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
0x0000-0x03FF1024galaxia.1dCRC(2dd50aab) (Fluke: C61F)
0x0000-0x03FF1024galaxia.1dCRC(2dd50aab) (Fluke: C61F)
0x0000-0x03FF1024galaxia.1dCRC(2dd50aab) (Fluke: C61F)
0x0000-0x03FF1024galaxia.1dCRC(2dd50aab) (Fluke: C61F)
0x0400-0x07FF1024galaxia.3dCRC(1dc30185) (Fluke: B5AA)
0x0400-0x07FF1024galaxia.3dCRC(1dc30185) (Fluke: B5AA)
0x0400-0x07FF1024galaxia.3dCRC(1dc30185) (Fluke: B5AA)
0x0400-0x07FF1024galaxia.3dCRC(1dc30185) (Fluke: B5AA)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF1024galaxia.8hCRC(f3b4ffde) (Fluke: 766F)
0x0000-0x03FF1024galaxia.8hCRC(f3b4ffde) (Fluke: 766F)
0x0000-0x03FF1024galaxia.8hCRC(f3b4ffde) (Fluke: 766F)
0x0000-0x03FF1024galaxia.8hCRC(f3b4ffde) (Fluke: 766F)
0x0400-0x07FF1024galaxia.10hCRC(6d07fdd4) (Fluke: 0C19)
0x0400-0x07FF1024galaxia.10hCRC(6d07fdd4) (Fluke: 0C19)
0x0400-0x07FF1024galaxia.10hCRC(6d07fdd4) (Fluke: 0C19)
0x0400-0x07FF1024galaxia.10hCRC(6d07fdd4) (Fluke: 0C19)
0x0800-0x0BFF1024galaxia.11hCRC(1520eb3d)
0x0800-0x0BFF1024galaxia.11hCRC(1520eb3d) (Fluke: 2D18)
0x0800-0x0BFF1024galaxia.11hCRC(1520eb3d) (Fluke: 2D18)
0x0800-0x0BFF1024galaxia.11hCRC(1520eb3d) (Fluke: 2D18)
0x0C00-0x0FFF1024galaxia.13hCRC(c4482770)
0x0C00-0x0FFF1024galaxia.13hCRC(c4482770) (Fluke: AAE3)
0x0C00-0x0FFF1024galaxia.13hCRC(c4482770) (Fluke: AAE3)
0x1000-0x13FF1024galaxia.8iCRC(45b88599) (Fluke: 86D5)
0x1000-0x13FF1024galaxia.8iCRC(45b88599) (Fluke: 86D5)
0x1000-0x13FF1024galaxia.8iCRC(45b88599) (Fluke: 86D5)
0x1000-0x13FF1024galaxia.8iCRC(45b88599) (Fluke: 86D5)
0x2000-0x23FF1024galaxia.10iCRC(c0baa654)
0x2000-0x23FF1024galaxia.10iCRC(c0baa654)
0x2000-0x23FF1024galaxia.10iCRC(c0baa654)
0x2000-0x23FF1024galaxia.10iCRC(c0baa654) (Fluke: 699E)
0x2400-0x27FF1024galaxia.11iCRC(4456808a) (Fluke: 40BC)
0x2400-0x27FF1024galaxia.11iCRC(4456808a) (Fluke: 40BC)
0x2400-0x27FF1024galaxia.11iCRC(4456808a) (Fluke: 40BC)
0x2400-0x27FF1024galaxia.11iCRC(4456808a) (Fluke: 40BC)
0x2800-0x2BFF1024galaxia.13iCRC(cf653b9a) (Fluke: 8F9F)
0x2800-0x2BFF1024galaxia.13iCRC(cf653b9a) (Fluke: 8F9F)
0x2800-0x2BFF1024galaxia.13iCRC(cf653b9a) (Fluke: 8F9F)
0x2800-0x2BFF1024galaxia.13iCRC(cf653b9a)
0x2C00-0x2FFF1024galaxia.11lCRC(50c6a645)
0x2C00-0x2FFF1024galaxia.11lCRC(50c6a645) (Fluke: 6F5D)
0x2C00-0x2FFF1024galaxia.11lCRC(50c6a645) (Fluke: 6F5D)
0x2C00-0x2FFF1024galaxia.11lCRC(50c6a645) (Fluke: 6F5D)
0x3000-0x33FF1024galaxia.13lCRC(3a9c38c7) (Fluke: 46CB)
0x3000-0x33FF1024galaxia.13lCRC(3a9c38c7) (Fluke: 46CB)
0x3000-0x33FF1024galaxia.13lCRC(3a9c38c7) (Fluke: 46CB)
0x3000-0x33FF1024galaxia.13lCRC(3a9c38c7) (Fluke: 46CB)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512prom.11oCRC(ae816417) (Fluke: 9D7B)
0x0000-0x01FF512prom.11oCRC(ae816417) (Fluke: 9D7B)
0x0000-0x01FF512prom.11oCRC(ae816417) (Fluke: 9D7B)
0x0000-0x01FF512prom.11oCRC(ae816417) (Fluke: 9D7B)
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