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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.
Peek-a-Boo! (Jaleco, 1993)
Memory Area:megasys1D_map
Address RangeLengthFunctionDescription
0x0000-0x3FFFF262144ROM
0xC2000-0xC20056Device Writescroll0, megasys1_tilemap_device, scroll_w
0xC2008-0xC200D6Device Writescroll1, megasys1_tilemap_device, scroll_w
0xC2108-0xC21092Write NOP(//AM_WRITE(sprite_bank_w))
0xC2200-0xC22012Read/Writesprite_flag_r, sprite_flag_w
0xC2208-0xC22092Writeactive_layers_w
0xC2308-0xC23092Writescreen_flag_w
0xCA000-0xCBFFF8192RAM, Sharedobjectram
0xD0000-0xD3FFF16384RAM Device Write, Sharedscroll1, megasys1_tilemap_device, write, scroll1
0xD8000-0xD87FF2048Mirror, RAM Device Write, Shared0x3000, palette, palette_device, write, palette
0xE0000-0xE00012Read PortDSW
0x0000EasyActive High
0x0003NormalActive High
0x0002HardActive High
0x0001HardestActive High
0x0008PaddlesActive High
0x0000ButtonsActive High
0x0030Female and Male (Full)Active High
0x0020Female (Full)Active High
0x0010Female (Partial)Active High
0x0000NoneActive High
0x0040UprightActive High
0x0000CocktailActive High
0x00801Active High
0x00002Active High
0x01004C_1CActive High
0x02003C_1CActive High
0x03002C_1CActive High
0x07001C_1CActive High
0x06001C_2CActive High
0x05001C_3CActive High
0x04001C_4CActive High
0x0000Free_PlayActive High
0x08004C_1CActive High
0x10003C_1CActive High
0x18002C_1CActive High
0x38001C_1CActive High
0x30001C_2CActive High
0x28001C_3CActive High
0x20001C_4CActive High
0x0000Free_PlayActive High
0x0000OffActive High
0x4000OnActive High
0x8000OffActive High
0x0000OnActive High
0xE8000-0xEBFFF16384RAM Device Write, Sharedscroll0, megasys1_tilemap_device, write, scroll0
0xF0000-0xF00012Read PortSYSTEM
0x0001Coin 3Active Low
0x0002Coin 4Active Low
0x0004Coin 1Active Low
0x0008Coin 2Active Low
0x0010Start 1Active Low
0x0020Start 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0x0100Button 1Active Low
0x0200Button 2Active Low
0x0400Button 1Active Low
0x0800Button 2Active Low
0x1000Button 3Active Low
0x2000Button 4Active Low
0x4000UnknownActive Low
0x8000UnknownActive Low
0xF8000-0xF80012Device Read/Write 8-bitoki1, okim6295_device, read, write, 0x00ff
0x1F0000-0x1FFFFF65536RAM(/*_WRITE(ram_w)*/ AM_SHARE("ram"))
 

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:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x0FFF4096mo-90233.mcu
0x0000-0x0FFF4096mo-90233.mcu
Memory Area:oki1
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFFF1048576peeksamp.124CRC(e1206fa8) (Fluke: EE7E)
0x0000-0xFFFFF1048576peeksamp.124CRC(e1206fa8) (Fluke: EE7E)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x01FF512priority.69CRC(b40bff56) (Fluke: BDB7)
0x0000-0x01FF512priority.69CRC(b40bff56) (Fluke: BDB7)
Memory Area:scroll0
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF5242885CRC(34fa07bb) (Fluke: 07DA)
0x0000-0x7FFFF5242885CRC(34fa07bb) (Fluke: 07DA)
Memory Area:scroll1
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF1310724CRC(f037794b) (Fluke: AE06)
0x0000-0x1FFFF1310724CRC(f037794b) (Fluke: AE06)
Memory Area:sprites
Address RangeLengthLabel/LocationDescription
0x0000-0x7FFFF5242881CRC(5a444ecf) (Fluke: 2110)
0x0000-0x7FFFF5242881CRC(5a444ecf) (Fluke: 2110)
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