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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.
Bega's Battle (Data East, 1983)
Memory Area:rblaster_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096RAM
0x10001Read Port, Write NOPIN0, (// (w) coin lockout)
0x0001Joystick DownActive Low
0x0002Joystick UpActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040Button 3Active Low
0x0080TiltActive Low
0x10011Read PortDSW1
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010Start 2Active Low
0x0020Start 1Active Low
0x0040Coin 1Active Low
0x0080Coin 2Active Low
0x10021Read PortDSW2
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0x10031Read PortIN1
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080SpecialActive High
0x10041Device Read, Writesoundlatch2, generic_latch_8_device, read, decold_sound_cmd_w
0x10051Readsound_status_r
0x10061Readacia_status_hack_r
0x10071Device Read/Writelaserdisc, sony_ldp1000_device, status_r, command_w
0x1800-0x1FFF2048RAM Device Write, Sharedpalette, palette_device, write, palette
0x2000-0x27FF2048RAM
0x2800-0x2BFF1024RAM, Sharedvram0
0x2C00-0x2FFF1024RAM, Sharedattr0
0x3000-0x37FF2048RAM
0x3800-0x3BFF1024RAM, Sharedvram1
0x3C00-0x3FFF1024RAM, Sharedattr1
0x4000-0xFFFF49152ROM
Memory Area:rblaster_sound_map
Address RangeLengthFunctionDescription
0x0000-0x01FF512RAM
0x20001Device Writeay1, ay8910_device, data_w
0x40001Device Writeay1, ay8910_device, address_w
0x60001Device Writeay2, ay8910_device, data_w
0x80001Device Writeay2, ay8910_device, address_w
0xA0001Device Read, Device Writesoundlatch, generic_latch_8_device, read, soundlatch2, generic_latch_8_device, write
0xE000-0xFFFF8192ROM
 

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
0xE000-0xFFFF8192an06CRC(cbbcd730)
0xE000-0xFFFF8192an06CRC(cbbcd730)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192an0aCRC(e429305d)
0x0000-0x1FFF8192an0aCRC(e429305d)
0x2000-0x3FFF8192an07CRC(6b8ad735)
0x2000-0x3FFF8192an07CRC(6b8ad735)
0x4000-0x5FFF8192an0bCRC(09e4b780)
0x4000-0x5FFF8192an0bCRC(09e4b780)
0x6000-0x7FFF8192an08CRC(b5518391)
0x6000-0x7FFF8192an08CRC(b5518391)
0x8000-0x9FFF8192an0cCRC(0c127207)
0x8000-0x9FFF8192an0cCRC(0c127207)
0xA000-0xBFFF8192an09CRC(b7375fd7)
0xA000-0xBFFF8192an09CRC(b7375fd7)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x4000-0x5FFF8192an05-3CRC(c917a283)
0x6000-0x7FFF8192an04-3CRC(935b2b0a)
0x8000-0x9FFF8192an03-3CRC(79438d80)
0xA000-0xBFFF8192an02-3CRC(98ce4ca0)
0xC000-0xDFFF8192an01CRC(15f8921d)
0xC000-0xDFFF8192an01CRC(15f8921d)
0xE000-0xFFFF8192an00-3CRC(124a3a36)
Memory Area:plds
Address RangeLengthLabel/LocationDescription
0x0000-0x002B44lp1-1.pldCRC(cc84cb09)
0x0000-0x002B44lp1-1.pldCRC(cc84cb09)
0x0100-0x012B44lp1-2.pldCRC(60e16fc4)
0x0100-0x012B44lp1-2.pldCRC(60e16fc4)
0x0200-0x023352lp1-3.pldCRC(976a7c57)
0x0200-0x023352lp1-3.pldCRC(976a7c57)
0x0300-0x033352lp1-4.pldCRC(cc9a442f)
0x0300-0x033352lp1-4.pldCRC(cc9a442f)
0x0400-0x042B44lp1-5.pldCRC(2d9f3118)
0x0400-0x042B44lp1-5.pldCRC(2d9f3118)
0x0500-0x052B44lp2-1.pldCRC(dbb05313)
0x0500-0x052B44lp2-1.pldCRC(dbb05313)
0x0600-0x062B44lp2-4.pldCRC(4c72736c)
0x0600-0x062B44lp2-4.pldCRC(4c72736c)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32af-8.bprCRC(20006a72)
0x0000-0x001F32af-8.bprCRC(20006a72)
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