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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.
Bad Lands (Atari Games, 1989)
Memory Area:audio_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192RAM
0x2000-0x20012Device Read/Writeymsnd, ym2151_device, read, write
0x2800-0x2BFF1024Read/Writeaudio_io_r, audio_io_w
0x3000-0x3FFF4096ROM Banksoundbank
0x4000-0xFFFF49152ROM
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM
0xFC0000-0xFC1FFF8192Read, Device Writesound_busy_r, soundcomm, atari_sound_comm_device, sound_reset_w
0xFD0000-0xFD1FFF8192Device Read/Write 8-biteeprom, atari_eeprom_device, read, write, 0x00ff
0xFE0000-0xFE1FFF8192Device Writewatchdog, watchdog_timer_device, reset16_w
0xFE2000-0xFE3FFF8192Writevideo_int_ack_w
0xFE4000-0xFE5FFF8192Read PortFE4000
0x000fUnusedActive Low
0x0010Button 2Active Low
0x0020Button 2Active Low
0x0040CustomActive High
0xff00UnusedActive Low
0xFE6000-0xFE60012Read PortFE6000
0x00ffDialActive High
0xff00UnusedActive Low
0xFE6002-0xFE60032Read PortFE6002
0x00ffDialActive High
0xff00UnusedActive Low
0xFE6004-0xFE60052Readpedal_0_r
0xFE6006-0xFE60072Readpedal_1_r
0xFE8000-0xFE9FFF8192Device Write 8-bitsoundcomm, atari_sound_comm_device, main_command_w, 0xff00
0xFEA000-0xFEBFFF8192Device Read 8-bitsoundcomm, atari_sound_comm_device, main_response_r, 0xff00
0xFEC000-0xFEDFFF8192Writebadlands_pf_bank_w
0xFEE000-0xFEFFFF8192Device Writeeeprom, atari_eeprom_device, unlock_write
0xFFC000-0xFFC3FF1024Device Read/Write 8-bit, Sharedpalette, palette_device, read, write, 0xff00, palette
0xFFE000-0xFFEFFF4096RAM Device Write, Sharedplayfield, tilemap_device, write, playfield
0xFFF000-0xFFF1FF512RAM, Sharedmob
0xFFF200-0xFFFFFF3584RAM
 

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
0x0000-0xFFFF65536136074-1018.9cCRC(a05fd146) (Fluke: 18DC)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536136074-1012.4nCRC(5d124c6c),playfield (Fluke: 0BA5)
0x10000-0x1FFFF65536136074-1013.2nCRC(b1ec90d6) (Fluke: 4637)
0x20000-0x2FFFF65536136074-1014.4sCRC(248a6845) (Fluke: 1AF1)
0x30000-0x3FFFF65536136074-1015.2sCRC(792296d8) (Fluke: 41D9)
0x40000-0x4FFFF65536136074-1016.4uCRC(878f7c66) (Fluke: 1439)
0x50000-0x5FFFF65536136074-1017.2uCRC(ad0071a3) (Fluke: 9A4A)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536136074-1010.14rCRC(c15f629e),mo (Fluke: 0EB7)
0x10000-0x1FFFF65536136074-1011.10rCRC(fb0b6717) (Fluke: C3D1)
0x20000-0x2FFFF65536136074-1019.14tCRC(0e26bff6) (Fluke: 17EE)
Memory Area:plds
Address RangeLengthLabel/LocationDescription
0x0000-0x0116279136074-1001.26cCRC(04c3be6a) (Fluke: 4271)
0x0200-0x0316279136074-1002.21rCRC(f68bf41d) (Fluke: FC9A)
0x0400-0x0516279136074-1003.16sCRC(a288bbd0) (Fluke: 95DE)
0x0600-0x0716279136074-1004.9nCRC(5ffbdaad)
0x0800-0x0916279136074-1005.12eCRC(9df77c79) (Fluke: D991)
0x0A00-0x0B16279136074-2000.26rCRC(fb8fb3d0)
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