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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.
Gun Dealer (Dooyong, 1990)
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x7FFF32768ROM
0x8000-0xBFFF16384ROM Bankbank1
0xC0001Read PortDSW0
0x0001UnknownActive High
0x0001OffActive High
0x0000OnActive High
0x0002UnknownActive High
0x0002OffActive High
0x0000OnActive High
0x000cDifficultyActive High
0x000cEasyActive High
0x0008MediumActive High
0x0004HardActive High
0x0000HardestActive High
0x0010Demo_SoundsActive High
0x0010OffActive High
0x0000OnActive High
0x0020UnknownActive High
0x0020OffActive High
0x0000OnActive High
0x0040CabinetActive High
0x0000UprightActive High
0x0040CocktailActive High
0x0080Flip_ScreenActive High
0x0000OffActive High
0x0080OnActive High
0xC0011Read PortDSW1
0x0007Coin_AActive High
0x00005C_1CActive High
0x00014C_1CActive High
0x00023C_1CActive High
0x00032C_1CActive High
0x00071C_1CActive High
0x00061C_2CActive High
0x00051C_3CActive High
0x00041C_4CActive High
0x0038Coin_BActive High
0x00005C_1CActive High
0x00084C_1CActive High
0x00103C_1CActive High
0x00182C_1CActive High
0x00381C_1CActive High
0x00301C_2CActive High
0x00281C_3CActive High
0x00201C_4CActive High
0x00c0UnknownActive High
0x00000Active High
0x00401Active High
0x00802Active High
0x00c03Active High
0xC0041Read PortIN0
0x0001Coin 1Active Low
0x0002Coin 2Active Low
0x0004Service 1Active Low
0x0008Start 1Active Low
0x0010Start 2Active Low
0x0020UnknownActive 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:gfx1
Address RangeLengthLabel/LocationDescription
0x0000-0xFFFF655363.6pCRC(01f99de2) (Fluke: 5894)
Memory Area:proms
Address RangeLengthLabel/LocationDescription
0x0000-0x00FF25682s135.7l
0x0000-0x00FF25682s135.7l
0x0100-0x01FF25682s129.7i
0x0100-0x01FF25682s129.7i
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