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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.
Yam! Yam!? (Dooyong, 1990)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0xBFFF16384ROM Bankbank1
0xC0001Read PortDSW0
0x0003LivesActive High
0x00003Active High
0x00014Active High
0x00025Active High
0x00036Active High
0x0000Easy?Active High
0x0004Medium?Active High
0x0008Hard?Active High
0x000cHardest?Active High
0x0010Demo_SoundsActive High
0x0010OffActive High
0x0000OnActive High
0x0020UnknownActive High
0x0020OffActive High
0x0000OnActive High
0x0040CabinetActive High
0x0040UprightActive High
0x0000CocktailActive High
0x0080Flip_ScreenActive High
0x0000OffActive High
0x0080OnActive High
0xC0011Read PortDSW1
0x0007Coin_AActive High
0x00075C_1CActive High
0x00064C_1CActive High
0x00053C_1CActive High
0x00042C_1CActive High
0x00031C_1CActive High
0x00021C_1CActive High
0x00011C_1CActive High
0x00001C_1CActive High
0x0038Coin_BActive High
0x00385C_1CActive High
0x00304C_1CActive High
0x00283C_1CActive High
0x00202C_1CActive High
0x00181C_1CActive High
0x00101C_1CActive High
0x00081C_1CActive High
0x00001C_1CActive High
0x0040Free_PlayActive High
0x0000OffActive High
0x0040OnActive High
0xC0041Read PortIN0
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0008Start 1Active Low
0x0010Start 2Active Low
0x0020TiltActive Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xC0051Read PortIN1
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xC0061Read PortIN2
0x0001Joystick RightActive Low
0x0002Joystick LeftActive Low
0x0004Joystick DownActive Low
0x0008Joystick UpActive Low
0x0010Button 1Active Low
0x0020Button 2Active Low
0x0040UnknownActive Low
0x0080UnknownActive Low
0xC010-0xC0134Writeyamyam_fg_scroll_w (/* Yam Yam only */)
0xC0141Writegundealr_flipscreen_w
0xC0161Writeyamyam_bankswitch_w
0xC020-0xC0234Writegundealr_fg_scroll_w (/* Gun Dealer only */)
0xC400-0xC7FF1024RAM Write, Sharedgundealr_paletteram_w, paletteram
0xC800-0xCFFF2048RAM Write, Sharedgundealr_bg_videoram_w, bg_videoram
0xD000-0xDFFF4096RAM Write, Sharedgundealr_fg_videoram_w, fg_videoram
0xE000-0xFFFF8192RAM, Sharedrambase
Memory Area:main_portmap
Address RangeLengthFunctionDescription
0x0000-0x00012Device Read/Writeymsnd, ym2203_device, read, write
 

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:gfx2
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF1310721.16aCRC(b122828d) (Fluke: 3772)
0x0000-0x1FFFF1310721.16aCRC(b122828d) (Fluke: 3772)
Memory Area:maincpu
Address RangeLengthLabel/LocationDescription
0x0000-0x1FFFF1310723.10fCRC(96ae9088) (Fluke: 06A1)
0x0000-0x1FFFF1310723.10fCRC(96ae9088) (Fluke: 06A1)
Memory Area:mcu
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF65536mcu
0x0000-0xFFFF65536b2.16dCRC(cb4f84ee) (Fluke: 0542)
0x0000-0xFFFF65536mcu
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