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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.
Oli-Boo-Chu (Irem / GDI, 1981)
Memory Area:olibochu_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0x83FF1024RAM Write, Sharedolibochu_videoram_w, videoram
0x8400-0x87FF1024RAM Write, Sharedolibochu_colorram_w, colorram
0x9000-0x903F64RAM(//???)
0x9800-0x983F64RAM(//???)
0xA0001Read PortIN0
0x0001Start 1Active Low
0x0002Start 2Active Low
0x0004Service 1Active Low
0x0008UnknownActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040Coin 2Active Low
0x0080Coin 1Active Low
0xA0011Read PortIN1
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xA0021Read PortIN2
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010UnknownActive Low
0x0020UnknownActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xA0031Read PortDSW0
0x00002Active High
0x00033Active High
0x00024Active High
0x00015Active High
0x000c5000Active High
0x000810000Active High
0x000415000Active High
0x0000NoneActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x0000UprightActive High
0x0040CocktailActive High
0x0080OffActive High
0x0000OnActive High
0xA0041Read PortDSW1
0x0001OffActive High
0x0000OnActive High
0x0002OffActive High
0x0000OnActive High
0x0004OffActive High
0x0000OnActive High
0x0008OffActive High
0x0000OnActive High
0x0010OffActive High
0x0000OnActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xA0051Read PortDSW2
0x0001OffActive High
0x0000OnActive High
0x00004C_1CActive High
0x00023C_1CActive High
0x00042C_1CActive High
0x000e1C_1CActive High
0x000c1C_2CActive High
0x000a1C_3CActive High
0x00081C_4CActive High
0x00061C_5CActive High
0x0020OffActive High
0x0000OnActive High
0x0040OffActive High
0x0000OnActive High
0x0080OffActive High
0x0000OnActive High
0xA800-0xA8012Writesound_command_w
0xA8021Writeolibochu_flipscreen_w (/* bit 6 = enable sound? */)
0xF000-0xFFFF4096RAM
0xF400-0xF41F32RAM, Sharedspriteram
0xF440-0xF47F64RAM, Sharedspriteram2
Memory Area:olibochu_sound_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM
0x6000-0x63FF1024RAM
0x70001Device Readsoundlatch, generic_latch_8_device, read (/* likely ay8910 input port, not direct */)
0x7000-0x70012Device Writeaysnd, ay8910_device, address_data_w
0x70041Write NOP(//sound filter?)
0x70061Write NOP(//irq ack?)
 

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:audiocpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF409617.4jCRC(57f07402) (Fluke: 2BE6)
0x1000-0x1FFF409618.4lCRC(0a903e9c) (Fluke: AC46)
Memory Area:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF409613.6nCRC(b4fcf9af) (Fluke: 24DC)
0x1000-0x1FFF409614.4nCRC(af54407e) (Fluke: F162)
Memory Area:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF40969.6aCRC(fa69e16e) (Fluke: 6F9D)
0x1000-0x1FFF409610.2aCRC(10359f84) (Fluke: A411)
0x2000-0x2FFF409611.4aCRC(1d968f5f) (Fluke: 19FA)
0x3000-0x3FFF409612.2aCRC(d8f0c157) (Fluke: 527B)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF40961b.3nCRC(bf17f4f4) (Fluke: F75A)
0x1000-0x1FFF40962b.3lmCRC(63833b0d) (Fluke: B4E7)
0x2000-0x2FFF40963b.3kCRC(a4038e8b) (Fluke: 605F)
0x3000-0x3FFF40964b.3jCRC(aad4bec4) (Fluke: 563C)
0x4000-0x4FFF40965b.3hCRC(66efa79f) (Fluke: 72B0)
0x5000-0x5FFF40966b.3fCRC(1123d1ef) (Fluke: AFEB)
0x6000-0x6FFF40967c.3eCRC(89c26fb4) (Fluke: 829A)
0x7000-0x7FFF40968b.3dCRC(af19e5a5) (Fluke: 9529)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x001F32c-1CRC(e488e831),palette (Fluke: 42B4)
0x0020-0x011F256c-2CRC(698a3ba0),sprite lookup table (Fluke: 490A)
0x0120-0x021F256c-3CRC(efc4e408),char lookup table (Fluke: AC10)
Memory Area:samples
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF409615.1kCRC(fb5dd281) (Fluke: 045B)
0x1000-0x1FFF409616.1mCRC(c07614a5) (Fluke: 0996)
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