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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.
Burger Time (Data East Corporation, 1982)
Memory Area:audio_map
Address RangeLengthFunctionDescription
0x0000-0x03FF1024Mirror, RAM, Shared0x1c00, , audio_rambase
0x2000-0x3FFF8192Device Writeay1, ay8910_device, data_w
0x4000-0x5FFF8192Device Writeay1, ay8910_device, address_w
0x6000-0x7FFF8192Device Writeay2, ay8910_device, data_w
0x8000-0x9FFF8192Device Writeay2, ay8910_device, address_w
0xA000-0xBFFF8192Readaudio_command_r
0xC000-0xDFFF8192Writeaudio_nmi_enable_w
0xE000-0xEFFF4096Mirror, ROM0x1000,
Memory Area:btime_map
Address RangeLengthFunctionDescription
0x0000-0x07FF2048RAM, Sharedrambase
0x0C00-0x0C0F16RAM Device Write, Sharedpalette, palette_device, write, palette
0x1000-0x13FF1024RAM, Sharedvideoram
0x1400-0x17FF1024RAM, Sharedcolorram
0x1800-0x1BFF1024Read/Writebtime_mirrorvideoram_r, btime_mirrorvideoram_w
0x1C00-0x1FFF1024Read/Writebtime_mirrorcolorram_r, btime_mirrorcolorram_w
0x40001Read Port, Write NOPP1,
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020UnknownActive Low
0x0040UnusedActive Low
0x0080UnusedActive Low
0x40011Read PortP2
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick UpActive Low
0x0008Joystick DownActive Low
0x0010Button 1Active Low
0x0020UnknownActive Low
0x0040UnusedActive Low
0x0080UnusedActive Low
0x40021Read Port, WriteSYSTEM, btime_video_control_w
0x0001Start 1Active Low
0x0002Start 2Active Low
0x0004TiltActive Low
0x0008UnknownActive Low
0x0010UnusedActive Low
0x0020UnusedActive Low
0x0040Coin 1Active High
0x0080Coin 2Active High
0x40031Read Port, WriteDSW1, audio_command_w
0x0003Coin_AActive High
0x00002C_1CActive High
0x00031C_1CActive High
0x00021C_2CActive High
0x00011C_3CActive High
0x000cCoin_BActive High
0x00002C_1CActive High
0x000c1C_1CActive High
0x00081C_2CActive High
0x00041C_3CActive High
0x0030OffActive High
0x0000Sound I/O Board OnlyActive High
0x0010Normal TestActive High
0x0020Cross Hatch OnlyActive High
0x0020OffActive High
0x0000OnActive High
0x0000UprightActive High
0x0040CocktailActive High
0x0080CabinetActive High
0x0000UprightActive High
0x0080CocktailActive High
0x0080CustomActive High
0x40041Read Port, WriteDSW2, bnj_scroll1_w
0x0001LivesActive High
0x00013Active High
0x00005Active High
0x0006Bonus_LifeActive High
0x000610000Active High
0x000415000Active High
0x000220000Active High
0x000030000Active High
0x00084Active High
0x00006Active High
0x0010NoActive High
0x0000YesActive High
0xB000-0xFFFF20480ROM
 

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
0xE000-0xEFFF4096ab14.12hCRC(f55e5211) (Fluke: C58D)
0xE000-0xEFFF4096ab14.12hCRC(f55e5211) (Fluke: C58D)
Memory Area:bg_map
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048ab03.6bCRC(d26bc1f3) (Fluke: F643)
0x0000-0x07FF2048ab03.6bCRC(d26bc1f3) (Fluke: F643)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096aa12.7kCRC(c4617243),charset #1 (Fluke: 38C7)
0x0000-0x0FFF4096aa12.7kCRC(c4617243),charset #1 (Fluke: 38C7)
0x1000-0x1FFF4096ab13.9kCRC(ac01042f) (Fluke: FAFB)
0x1000-0x1FFF4096ab13.9kCRC(ac01042f) (Fluke: FAFB)
0x2000-0x2FFF4096ab10.10kCRC(854a872a) (Fluke: 304B)
0x2000-0x2FFF4096ab10.10kCRC(854a872a) (Fluke: 304B)
0x3000-0x3FFF4096ab11.12kCRC(d4848014) (Fluke: 03D0)
0x3000-0x3FFF4096ab11.12kCRC(d4848014) (Fluke: 03D0)
0x4000-0x4FFF4096aa8.13kCRC(8650c788) (Fluke: 86CD)
0x4000-0x4FFF4096aa8.13kCRC(8650c788) (Fluke: 86CD)
0x5000-0x5FFF4096ab9.15kCRC(8dec15e6) (Fluke: 22AF)
0x5000-0x5FFF4096ab9.15kCRC(8dec15e6) (Fluke: 22AF)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048ab00.1bCRC(c7a14485),charset #2 (Fluke: D1D1)
0x0000-0x07FF2048ab00.1bCRC(c7a14485),charset #2 (Fluke: D1D1)
0x0800-0x0FFF2048ab01.3bCRC(25b49078) (Fluke: 45E5)
0x0800-0x0FFF2048ab01.3bCRC(25b49078) (Fluke: 45E5)
0x1000-0x17FF2048ab02.4bCRC(b8ef56c3) (Fluke: 4CFE)
0x1000-0x17FF2048ab02.4bCRC(b8ef56c3) (Fluke: 4CFE)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0xC000-0xCFFF4096aa04.9bCRC(368a25b5) (Fluke: 4F72)
0xD000-0xDFFF4096aa06.13bCRC(b4ba400d) (Fluke: 6B89)
0xD000-0xDFFF4096aa06.13bCRC(b4ba400d) (Fluke: 6B89)
0xE000-0xEFFF4096aa05.10bCRC(8005bffa) (Fluke: B9B0)
0xE000-0xEFFF4096aa05.10bCRC(8005bffa) (Fluke: B9B0)
0xF000-0xFFFF4096aa07.15bCRC(086440ad) (Fluke: 6466)
0xF000-0xFFFF4096aa07.15bCRC(086440ad) (Fluke: 6466)
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