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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.
Screw Loose (Mylstar, 1983)
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, Device Write0x07f8, watchdog, watchdog_timer_device, reset_w
0x58001Mirror, Read Port0x07f8, DSW
0x0001Demo_SoundsActive High
0x0001OffActive High
0x0000OnActive High
0x0000OffActive High
0x0002OnActive High
0x00005000Active High
0x000420000Active High
0x0008Free_PlayActive High
0x0000OffActive High
0x0008OnActive High
0x0050CoinageActive High
0x00002C_1CActive High
0x00102C_2CActive High
0x00401C_1CActive High
0x00501C_2CActive High
0x000025000Active High
0x002050000Active High
0x00003Active High
0x00805Active High
0x58011Mirror, Write0x07f8, gottlieb_analog_reset_w (/* A1J2 interface */)
0x58011Mirror, Read Port0x07f8, IN1 (/* IP10-17 */)
0x0002Select in Service ModeActive High
0x0004Coin 1Active High
0x0008Coin 2Active High
0x0010Joystickleft RightActive High
0x0020Joystickleft LeftActive High
0x0040Joystickleft DownActive High
0x0080Joystickleft UpActive High
0x58021Mirror, Write0x07f8, gottlieb_sh_w (/* OP20-27 */)
0x58021Mirror, Read Port0x07f8, IN2 (/* trackball H */)
0x00ffUnusedActive Low
0x58031Mirror, Read Port0x07f8, IN3 (/* trackball V */)
0x00ffUnusedActive Low
0x58031Mirror, Write0x07f8, general_output_w (/* OP30-37 */)
0x58041Mirror, Read Port0x07f8, IN4 (/* IP40-47 */)
0x0001Joystickright RightActive High
0x0002Joystickright LeftActive High
0x0004Joystickright DownActive High
0x0008Joystickright UpActive High
0x0010Start 2PActive High
0x0020Start 1PActive High
0x0040UnknownActive High
0x0080UnknownActive High
0x6000-0xFFFF40960ROM
 

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:bgtiles
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096bg0CRC(1fd5b649) (Fluke: 1E46)
0x1000-0x1FFF4096bg1CRC(c8ddb8ba) (Fluke: E7BF)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x6000-0x7FFF8192rom4CRC(744a2513) (Fluke: 0C5D)
0x8000-0x9FFF8192rom3CRC(ffde5b5d) (Fluke: F6A6)
0xA000-0xBFFF8192rom2CRC(97932b05) (Fluke: 10CA)
0xC000-0xDFFF8192rom1CRC(571b65ca) (Fluke: 2009)
0xE000-0xFFFF8192rom0CRC(6447fe54) (Fluke: 45C7)
Memory Area:r2sound:audiocpu
Address RangeLengthLabel/LocationDescription
0xC000-0xDFFF8192drom1CRC(ae965ade) (Fluke: C66F)
Memory Area:r2sound:speechcpu
Address RangeLengthLabel/LocationDescription
0xE000-0xFFFF8192yrom1CRC(3719b0b5) (Fluke: 73EF)
Memory Area:sprites
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192fg3CRC(97d4e63b) (Fluke: 5AB1)
0x2000-0x3FFF8192fg2CRC(f76e56ca) (Fluke: 813F)
0x4000-0x5FFF8192fg1CRC(698c395f) (Fluke: 3759)
0x6000-0x7FFF8192fg0CRC(f23269fb) (Fluke: 7170)
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