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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.
Pengo (Sega, 1982)
Memory Area:pengo_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x83FF1024RAM Write, Sharedpacman_videoram_w, videoram (/* video and color RAM, scratchpad RAM, sprite codes */)
0x8400-0x87FF1024RAM Write, Sharedpacman_colorram_w, colorram
0x8800-0x8FEF2032RAM, Sharedmainram
0x8FF0-0x8FFF16RAM, Sharedspriteram
0x9000-0x901F32Device Writenamco, namco_device, pacman_sound_w
0x9000-0x903F64Read PortDSW1
0x000fCoin_AActive High
0x00004C_1CActive High
0x00083C_1CActive High
0x00042C_1CActive High
0x00092 Coins/1 Credit 5/3Active High
0x00052 Coins/1 Credit 4/3Active High
0x000c1C_1CActive High
0x000d1 Coin/1 Credit 5/6Active High
0x00031 Coin/1 Credit 4/5Active High
0x000b1 Coin/1 Credit 2/3Active High
0x00021C_2CActive High
0x00071 Coin/2 Credits 5/11Active High
0x000f1 Coin/2 Credits 4/9Active High
0x000a1C_3CActive High
0x00061C_4CActive High
0x000e1C_5CActive High
0x00011C_6CActive High
0x00f0Coin_BActive High
0x00004C_1CActive High
0x00803C_1CActive High
0x00402C_1CActive High
0x00902 Coins/1 Credit 5/3Active High
0x00502 Coins/1 Credit 4/3Active High
0x00c01C_1CActive High
0x00d01 Coin/1 Credit 5/6Active High
0x00301 Coin/1 Credit 4/5Active High
0x00b01 Coin/1 Credit 2/3Active High
0x00201C_2CActive High
0x00701 Coin/2 Credits 5/11Active High
0x00f01 Coin/2 Credits 4/9Active High
0x00a01C_3CActive High
0x00601C_4CActive High
0x00e01C_5CActive High
0x00101C_6CActive High
0x9020-0x902F16Write Only, Sharedspriteram2
0x9040-0x907F64Read PortDSW0
0x0001Bonus_LifeActive High
0x000030000Active High
0x000150000Active High
0x0002Demo_SoundsActive High
0x0002OffActive High
0x0000OnActive High
0x0004CabinetActive High
0x0000UprightActive High
0x0004CocktailActive High
0x0018LivesActive High
0x00182Active High
0x00103Active High
0x00084Active High
0x00005Active High
0x0020OffActive High
0x0000OnActive High
0x00c0DifficultyActive High
0x00c0EasyActive High
0x0080MediumActive High
0x0040HardActive High
0x0000HardestActive High
0x90401Writeirq_mask_w
0x90411Device Writenamco, namco_device, pacman_sound_enable_w
0x90421Writepengo_palettebank_w
0x90431Writepacman_flipscreen_w
0x9044-0x90452Writepengo_coin_counter_w
0x90461Writepengo_colortablebank_w
0x90471Writepengo_gfxbank_w
0x90701Write NOP
0x9080-0x90BF64Read PortIN1
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0020Start 1Active Low
0x0040Start 2Active Low
0x0080Button 1Active Low
0x90C0-0x90FF64Read PortIN0
0x0001Joystick UpActive Low
0x0002Joystick DownActive Low
0x0004Joystick LeftActive Low
0x0008Joystick RightActive Low
0x0010Coin 1Active Low
0x0020Coin 2Active Low
0x0040Coin 3Active Low
0x0080Button 1Active Low
 

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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096ep1640.92CRC(d7eec6cd),tiles (bank 1) (Fluke: 1039)
0x0000-0x0FFF4096ep1640.92CRC(d7eec6cd),tiles (bank 1) (Fluke: 1039)
0x0000-0x0FFF4096ep1640.92CRC(d7eec6cd),tiles (bank 1) (Fluke: 1039)
0x0000-0x0FFF4096ep1640.92CRC(d7eec6cd),tiles (bank 1) (Fluke: 1039)
0x0000-0x0FFF4096ep1640.92CRC(d7eec6cd),tiles (bank 1) (Fluke: 1039)
0x1000-0x1FFF4096ep1695.105CRC(5bfd26e9),tiles (bank 2) (Fluke: 1EE1)
0x1000-0x1FFF4096ep1695.105CRC(5bfd26e9),tiles (bank 2) (Fluke: 1EE1)
0x1000-0x1FFF4096ep1695.105CRC(5bfd26e9),tiles (bank 2) (Fluke: 1EE1)
0x1000-0x1FFF4096ep1695.105CRC(5bfd26e9),tiles (bank 2) (Fluke: 1EE1)
0x1000-0x1FFF4096ep1695.105CRC(5bfd26e9),tiles (bank 2) (Fluke: 1EE1)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096ep1689c.8CRC(f37066a8) (Fluke: CF1A)
0x1000-0x1FFF4096ep1690b.7CRC(baf48143) (Fluke: 7149)
0x2000-0x2FFF4096ep1691b.15CRC(adf0eba0) (Fluke: 8514)
0x3000-0x3FFF4096ep1692b.14CRC(a086d60f) (Fluke: 8260)
0x4000-0x4FFF4096ep1693b.21CRC(b72084ec) (Fluke: DA66)
0x4000-0x4FFF4096ep1693b.21CRC(b72084ec) (Fluke: DA66)
0x5000-0x5FFF4096ep1694b.20CRC(94194a89) (Fluke: 033D)
0x6000-0x6FFF4096ep5118b.32CRC(af7b12c4) (Fluke: C498)
0x6000-0x6FFF4096ep5118b.32CRC(af7b12c4) (Fluke: C498)
0x7000-0x7FFF4096ep5119c.31CRC(933950fe) (Fluke: 3671)
Memory Area:namco
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF256pr1635.51CRC(c29dea27),waveform (Fluke: 8417)
0x0000-0x00FF256pr1635.51CRC(c29dea27),waveform (Fluke: 8417)
0x0000-0x00FF256pr1635.51CRC(c29dea27),waveform (Fluke: 8417)
0x0000-0x00FF256pr1635.51CRC(c29dea27),waveform (Fluke: 8417)
0x0000-0x00FF256pr1635.51CRC(c29dea27),waveform (Fluke: 8417)
0x0100-0x01FF256pr1636.70CRC(77245b66),timing - not used (Fluke: E0E5)
0x0100-0x01FF256pr1636.70CRC(77245b66),timing - not used (Fluke: E0E5)
0x0100-0x01FF256pr1636.70CRC(77245b66),timing - not used (Fluke: E0E5)
0x0100-0x01FF256pr1636.70CRC(77245b66),timing - not used (Fluke: E0E5)
0x0100-0x01FF256pr1636.70CRC(77245b66),timing - not used (Fluke: E0E5)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32pr1633.78CRC(3a5844ec),color palette (Fluke: 3461)
0x0000-0x001F32pr1633.78CRC(3a5844ec),color palette (Fluke: 3461)
0x0000-0x001F32pr1633.78CRC(3a5844ec),color palette (Fluke: 3461)
0x0000-0x001F32pr1633.78CRC(3a5844ec),color palette (Fluke: 3461)
0x0000-0x001F32pr1633.78CRC(3a5844ec),color palette (Fluke: 3461)
0x0020-0x041F1024pr1634.88CRC(766b139b),color lookup (Fluke: A1E9)
0x0020-0x041F1024pr1634.88CRC(766b139b),color lookup (Fluke: A1E9)
0x0020-0x041F1024pr1634.88CRC(766b139b),color lookup (Fluke: A1E9)
0x0020-0x041F1024pr1634.88CRC(766b139b),color lookup (Fluke: A1E9)
0x0020-0x041F1024pr1634.88CRC(766b139b),color lookup (Fluke: A1E9)
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