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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.
Q*bert (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
0x0001OffActive High
0x0000OnActive High
0x0000OffActive High
0x0002OnActive High
0x0004CabinetActive High
0x0000UprightActive High
0x0004CocktailActive High
0x0000OffActive High
0x0008OnActive High
0x0010Free_PlayActive High
0x0000OffActive High
0x0010OnActive High
0x58001Mirror, Device Write0x07f8, watchdog, watchdog_timer_device, reset_w
0x58011Mirror, Read Port0x07f8, IN1 (/* IP10-17 */)
0x0001Start 1Active High
0x0002Start 2Active High
0x0004Coin 1Active High
0x0008Coin 2Active High
0x0010UnknownActive High
0x0020UnknownActive High
0x0080Select in Service ModeActive High
0x58011Mirror, Write0x07f8, gottlieb_analog_reset_w (/* A1J2 interface */)
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 */)
0x0001Joystick RightActive High
0x0002Joystick LeftActive High
0x0004Joystick UpActive High
0x0008Joystick DownActive High
0x0010Joystick RightActive High
0x0020Joystick LeftActive High
0x0040Joystick UpActive High
0x0080Joystick DownActive 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
0x0000-0x0FFF4096qb-bg0.binCRC(7a9ba824) (Fluke: 19CF)
0x0000-0x0FFF4096qb-bg0.binCRC(7a9ba824) (Fluke: 19CF)
0x0000-0x0FFF4096qb-bg0.binCRC(7a9ba824) (Fluke: 19CF)
0x1000-0x1FFF4096qb-bg1.binCRC(22e5b891) (Fluke: 2CF7)
0x1000-0x1FFF4096qb-bg1.binCRC(22e5b891) (Fluke: 2CF7)
0x1000-0x1FFF4096qb-bg1.binCRC(22e5b891) (Fluke: 2CF7)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0xA000-0xBFFF8192qb-rom2.binCRC(fe434526) (Fluke: 3E70)
0xC000-0xDFFF8192qb-rom1.binCRC(55635447) (Fluke: B6D4)
0xE000-0xFFFF8192qb-rom0.binCRC(8e318641) (Fluke: 68B9)
Memory Area:r1sound:audiocpu
Address RangeLengthLabel/LocationDescription
0x7000-0x77FF2048qb-snd1.binCRC(15787c07) (Fluke: AFF4)
0x7000-0x77FF2048qb-snd1.binCRC(15787c07) (Fluke: AFF4)
0x7000-0x77FF2048qb-snd1.binCRC(15787c07) (Fluke: AFF4)
0x7800-0x7FFF2048qb-snd2.binCRC(58437508) (Fluke: BD11)
0x7800-0x7FFF2048qb-snd2.binCRC(58437508) (Fluke: BD11)
0x7800-0x7FFF2048qb-snd2.binCRC(58437508) (Fluke: BD11)
Memory Area:sprites
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFF8192qb-fg3.binCRC(dd436d3a) (Fluke: 4A96)
0x0000-0x1FFF8192qb-fg3.binCRC(dd436d3a) (Fluke: 4A96)
0x0000-0x1FFF8192qb-fg3.binCRC(dd436d3a) (Fluke: 4A96)
0x2000-0x3FFF8192qb-fg2.binCRC(f69b9483) (Fluke: 9A3B)
0x2000-0x3FFF8192qb-fg2.binCRC(f69b9483) (Fluke: 9A3B)
0x2000-0x3FFF8192qb-fg2.binCRC(f69b9483) (Fluke: 9A3B)
0x4000-0x5FFF8192qb-fg1.binCRC(224e8356) (Fluke: 3A46)
0x4000-0x5FFF8192qb-fg1.binCRC(224e8356) (Fluke: 3A46)
0x4000-0x5FFF8192qb-fg1.binCRC(224e8356) (Fluke: 3A46)
0x6000-0x7FFF8192qb-fg0.binCRC(2f695b85) (Fluke: B85D)
0x6000-0x7FFF8192qb-fg0.binCRC(2f695b85) (Fluke: B85D)
0x6000-0x7FFF8192qb-fg0.binCRC(2f695b85) (Fluke: B85D)
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