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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.
Cannon Ball (Novomatic, 1985)
Memory Area:pacman_map
Address RangeLengthFunctionDescription
0x0000-0x3FFF16384Mirror, ROM0x8000,
0x4000-0x43FF1024Mirror, RAM Write, Shared0xa000, pacman_videoram_w, videoram
0x4400-0x47FF1024Mirror, RAM Write, Shared0xa000, pacman_colorram_w, colorram
0x4800-0x4BFF1024Mirror, Read, Write NOP0xa000, pacman_read_nop,
0x4C00-0x4FEF1008Mirror, RAM0xa000,
0x4FF0-0x4FFF16Mirror, RAM, Shared0xa000, , spriteram
0x50001Mirror, Read Port0xaf3f, IN0
0x0001Joystick UpActive Low
0x0002Joystick LeftActive Low
0x0004Joystick RightActive Low
0x0008Joystick DownActive Low
0x0010UnknownActive Low
0x0020Coin 1Active Low
0x0040Coin 2Active Low
0x0080Button 1Active Low
0x50001Mirror, Write0xaf38, irq_mask_w
0x50011Mirror, Device Write0xaf38, namco, namco_device, pacman_sound_enable_w
0x50021Mirror, Write NOP0xaf38,
0x50031Mirror, Write0xaf38, pacman_flipscreen_w
0x5004-0x50052Mirror, Write NOP0xaf38, (// AM_WRITE(pacman_leds_w))
0x50061Mirror, Write NOP0xaf38, (// AM_WRITE(pacman_coin_lockout_global_w))
0x50071Mirror, Write0xaf38, pacman_coin_counter_w
0x50401Mirror, Read Port0xaf3f, IN1
0x0001Joystick UpActive Low
0x0002Joystick LeftActive Low
0x0004Joystick RightActive Low
0x0008Joystick DownActive Low
0x0010UnknownActive Low
0x0020StartActive Low
0x0040SelectActive Low
0x0080Button 1Active Low
0x5040-0x505F32Mirror, Device Write0xaf00, namco, namco_device, pacman_sound_w
0x5060-0x506F16Mirror, Write Only, Shared0xaf00, , spriteram2
0x5070-0x507F16Mirror, Write NOP0xaf00,
0x50801Mirror, Write NOP0xaf3f,
0x50801Mirror, Read Port0xaf3f, DSW1
0x0003Scores and Progession BarsActive High
0x0001Scores onlyActive High
0x0002Progession Bars onlyActive High
0x0000NoneActive High
0x0004UprightActive High
0x0000CocktailActive High
0x00003Active High
0x00084Active High
0x00105Active High
0x00186Active High
0x50C01Mirror, Read Port0xaf3f, DSW2
0x00ffUnusedActive High
0x50C01Mirror, Device Write0xaf3f, watchdog, watchdog_timer_device, reset_w
Memory Area:writeport
Address RangeLengthFunctionDescription
0x00001Writepacman_interrupt_vector_w (/* Pac-Man only */)
 

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
0x0000-0x07FF2048z1-5eCRC(125779e0) (Fluke: 667C)
0x0000-0x001F32colorprom_1CRC(08f8ae7e) (Fluke: 86D0)
0x0020-0x011F256colorprom_2CRC(359a15dc) (Fluke: 2771)
0x0800-0x0FFF2048z3-5hCRC(78f866c0) (Fluke: 13CF)
0x1000-0x17FF2048z2-5fCRC(fbd2c99d) (Fluke: 634F)
0x1800-0x1FFF2048z4-5jCRC(8734c904) (Fluke: FD07)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x07FF2048n1-6eCRC(c68878c7) (Fluke: CD41)
0x0800-0x0FFF2048n2-6kCRC(ff3951a5) (Fluke: 0676)
0x1000-0x17FF2048n3-6fCRC(2329079d) (Fluke: 28C3)
0x1800-0x1FFF2048n4-6mCRC(fcc57ecb) (Fluke: B55F)
0x2000-0x27FF2048n5-6hCRC(52846c9d) (Fluke: 2971)
0x2800-0x2FFF2048n6-6nCRC(59e890dd) (Fluke: B6E7)
Memory Area:namco
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF25682s126.1mCRC(a9cc86bf) (Fluke: 71E8)
0x0100-0x01FF25682s126.3mCRC(77245b66),timing - not used (Fluke: E0E5)
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