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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.
Reactor (Gottlieb, 1982)
Memory Area:gottlieb_map
Address RangeLengthFunctionDescription
0x0000-0x0FFF4096RAM, Sharednvram
0x1000-0x1FFF4096RAM, Regionmaincpu, 0x1000 (/* or ROM */)
0x2000-0x2FFF4096RAM, Regionmaincpu, 0x2000 (/* or ROM */)
0x3000-0x30FF256Mirror, Write Only, Shared0x0700, , spriteram (/* FRSEL */)
0x3800-0x3BFF1024Mirror, RAM Write, Shared0x0400, gottlieb_videoram_w, videoram (/* BRSEL */)
0x4000-0x4FFF4096RAM Write, Sharedgottlieb_charram_w, charram (/* BOJRSEL1 */)
0x5000-0x501F32Mirror, Write, Shared0x07e0, gottlieb_paletteram_w, paletteram (/* COLSEL */)
0x58001Mirror, Read Port0x07f8, DSW
0x0001Demo_SoundsActive High
0x0000OffActive High
0x0001OnActive High
0x000010Active High
0x000215Active High
0x0004Free_PlayActive High
0x0004OffActive High
0x0000OnActive High
0x0000OffActive High
0x0008OnActive High
0x0010CabinetActive High
0x0010UprightActive High
0x0000CocktailActive High
0x0020CoinageActive High
0x00002C_1CActive High
0x00201C_1CActive High
0x00c0Bonus_LifeActive High
0x000010000Active High
0x004012000Active High
0x00c015000Active High
0x008020000Active High
0x58001Mirror, Device Write0x07f8, watchdog, watchdog_timer_device, reset_w
0x58011Mirror, Write0x07f8, gottlieb_analog_reset_w (/* A1J2 interface */)
0x58011Mirror, Read Port0x07f8, IN1 (/* IP10-17 */)
0x0001Select in Service ModeActive High
0x58021Mirror, Read Port0x07f8, IN2 (/* trackball H */)
0x00ffSpecialActive High
0x58021Mirror, Write0x07f8, gottlieb_sh_w (/* OP20-27 */)
0x58031Mirror, Write0x07f8, general_output_w (/* OP30-37 */)
0x58031Mirror, Read Port0x07f8, IN3 (/* trackball V */)
0x00ffSpecialActive High
0x58041Mirror, Read Port0x07f8, IN4 (/* IP40-47 */)
0x0001Start 1Active High
0x0002Start 2Active High
0x0004Button 2Active High
0x0008Button 1Active High
0x0010Coin 1Active High
0x0020Coin 2Active High
0x00c0UnknownActive High
0x6000-0xFFFF40960ROM
Memory Area:reactor_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192RAM
0x2000-0x20FF256Mirror, Write Only, Shared0x0f00, , spriteram (/* FRSEL */)
0x3000-0x33FF1024Mirror, RAM Write, Shared0x0c00, gottlieb_videoram_w, videoram (/* BRSEL */)
0x4000-0x4FFF4096RAM Write, Sharedgottlieb_charram_w, charram (/* BOJRSEL1 */)
0x6000-0x601F32Mirror, Write, Shared0x0fe0, gottlieb_paletteram_w, paletteram (/* COLSEL */)
0x70001Mirror, Device Write0x0ff8, watchdog, watchdog_timer_device, reset_w
0x70001Mirror, Read Port0x0ff8, DSW
0x0001Demo_SoundsActive High
0x0000OffActive High
0x0001OnActive High
0x000010Active High
0x000215Active High
0x0004Free_PlayActive High
0x0004OffActive High
0x0000OnActive High
0x0000OffActive High
0x0008OnActive High
0x0010CabinetActive High
0x0010UprightActive High
0x0000CocktailActive High
0x0020CoinageActive High
0x00002C_1CActive High
0x00201C_1CActive High
0x00c0Bonus_LifeActive High
0x000010000Active High
0x004012000Active High
0x00c015000Active High
0x008020000Active High
0x70011Mirror, Write0x0ff8, gottlieb_analog_reset_w (/* A1J2 interface */)
0x70011Mirror, Read Port0x0ff8, IN1 (/* buttons */)
0x0001Select in Service ModeActive High
0x70021Mirror, Read Port0x0ff8, IN2 (/* trackball H */)
0x00ffSpecialActive High
0x70021Mirror, Write0x0ff8, gottlieb_sh_w (/* trackball H */)
0x70031Mirror, Read Port0x0ff8, IN3 (/* trackball V */)
0x00ffSpecialActive High
0x70031Mirror, Write0x0ff8, reactor_output_w (/* trackball V */)
0x70041Mirror, Read Port0x0ff8, IN4
0x0001Start 1Active High
0x0002Start 2Active High
0x0004Button 2Active High
0x0008Button 1Active High
0x0010Coin 1Active High
0x0020Coin 2Active High
0x00c0UnknownActive High
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:maincpu
Address RangeLengthLabel/LocationDescription
0x8000-0x8FFF4096rom7CRC(a62d86fd) (Fluke: D1E5)
0x9000-0x9FFF4096rom6CRC(6ed841f3) (Fluke: 7F8A)
0xA000-0xAFFF4096rom5CRC(d90576a3) (Fluke: DAC0)
0xB000-0xBFFF4096rom4CRC(0155daae) (Fluke: 10E3)
0xC000-0xCFFF4096rom3CRC(f8881385) (Fluke: 4262)
0xD000-0xDFFF4096rom2CRC(3caba35b) (Fluke: 80CC)
0xE000-0xEFFF4096rom1CRC(944e1ddf) (Fluke: D716)
0xF000-0xFFFF4096rom0CRC(55930aed) (Fluke: 5855)
Memory Area:r1sound:audiocpu
Address RangeLengthLabel/LocationDescription
0x7000-0x77FF2048snd1CRC(d958a0fd) (Fluke: 68C9)
0x7800-0x7FFF2048snd2CRC(5dc86942) (Fluke: D580)
Memory Area:sprites
Address RangeLengthLabel/LocationDescription
0x1000-0x1FFF4096fg3CRC(8416ad53) (Fluke: 81C9)
0x3000-0x3FFF4096fg2CRC(5489605a) (Fluke: 7868)
0x5000-0x5FFF4096fg1CRC(18396c57) (Fluke: 645C)
0x7000-0x7FFF4096fg0CRC(d1f20e15) (Fluke: 5554)
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