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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.
Return of the Jedi (Atari, 1984)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x07FF2048RAM
0x0800-0x08FF256Mirror, RAM Write, Shared0x0300, nvram_data_w, nvram
0x0C001Mirror, Read Port, Write NOP0x03fe, 0c00,
0x0001Button 3Active Low
0x0002Button 2Active Low
0x0004Button 1Active Low
0x0008UnusedActive High
0x0020Service 1Active Low
0x0040Coin 2Active Low
0x0080Coin 1Active Low
0x0C011Mirror, Read Port, Write NOP0x03fe, 0c01,
0x0003UnusedActive Low
0x0004TiltActive High
0x0018UnusedActive Low
0x0060SpecialActive High
0x0080CustomActive High
0x1000-0x13FF1024Read/Write NOP
0x14001Mirror, Read, Write NOP0x03ff, jedi_audio_ack_latch_r,
0x18001Mirror, Read, Write NOP0x03ff, a2d_data_r,
0x1C00-0x1C012Mirror, Read NOP, Write0x007e, , nvram_enable_w
0x1C80-0x1C823Mirror, Read NOP, Write0x0078, , a2d_select_w
0x1C83-0x1C875Mirror, Read/Write NOP0x0078,
0x1D001Mirror, Read/Write NOP0x007f, (/* write: NVRAM store */)
0x1D801Mirror, Read NOP, Device Write0x007f, , watchdog, watchdog_timer_device, reset_w
0x1E001Mirror, Read NOP, Write0x007f, , main_irq_ack_w
0x1E80-0x1E812Mirror, Read NOP, Write0x0078, , jedi_coin_counter_w
0x1E82-0x1E832Mirror, Read/Write NOP0x0078, (/* write: LED control - not used */)
0x1E841Mirror, Read NOP, Write Only, Shared0x0078, , , foreground_bank
0x1E851Mirror, Read/Write NOP0x0078,
0x1E861Mirror, Read NOP, Write0x0078, , jedi_audio_reset_w
0x1E871Mirror, Read NOP, Write Only, Shared0x0078, , , video_off
0x1F001Mirror, Read NOP, Write0x007f, , jedi_audio_latch_w
0x1F801Mirror, Read NOP, Write0x007f, , rom_banksel_w
0x2000-0x27FF2048RAM, Sharedbackgroundram
0x2800-0x2FFF2048RAM, Sharedpaletteram
0x3000-0x37BF1984RAM, Sharedforegroundram
0x37C0-0x3BFF1088RAM, Sharedspriteram
0x3C00-0x3C012Mirror, Read NOP, Write0x00fe, , jedi_vscroll_w
0x3D00-0x3D012Mirror, Read NOP, Write0x00fe, , jedi_hscroll_w
0x3E001Mirror, Write Only, Shared0x01ff, , smoothing_table
0x4000-0x7FFF16384ROM Bankbank1
0x8000-0xFFFF32768ROM
 

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
0x8000-0xBFFF16384136030-133.01cCRC(6c601c69) (Fluke: E87C)
0xC000-0xFFFF16384136030-134.01aCRC(5e36c564) (Fluke: 3F2C)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192136030-215.11tCRC(3e49491f),Alphanumeric (Fluke: DDCF)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768136030-126.06rCRC(9c55ece8),Playfield (Fluke: 1C28)
0x8000-0xFFFF32768136030-127.06nCRC(4b09dcc5) (Fluke: D3C7)
Memory Area:gfx3
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFF32768136030-130.01hCRC(2646a793),Sprites (Fluke: 193D)
0x8000-0xFFFF32768136030-131.01fCRC(60107350) (Fluke: AAB6)
0x10000-0x17FFF32768136030-128.01mCRC(24663184) (Fluke: 0DDD)
0x18000-0x1FFFF32768136030-129.01kCRC(ac86b98c) (Fluke: 4719)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x8000-0xBFFF16384136030-221.14fCRC(414d05e3) (Fluke: 10E7)
0xC000-0xFFFF16384136030-222.13fCRC(7b3f21be) (Fluke: FBC8)
0x10000-0x13FFF16384136030-123.13dCRC(877f554a),Page 0 (Fluke: C2FA)
0x14000-0x17FFF16384136030-124.13bCRC(e72d41db),Page 1 (Fluke: 3C96)
0x18000-0x1BFFF16384136030-122.13aCRC(cce7ced5),Page 2 (Fluke: 123A)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x03FF1024136030-117.binCRC(9831bd55) (Fluke: AA3D)
0x0800-0x0BFF1024136030-118.binCRC(261fbfe7) (Fluke: EF02)
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