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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.
Desert Gun (Dave Nutting Associates / Midway, 1977)
Memory Area:desertgu_io_map
Address RangeLengthFunctionDescription
0x00001Mirror, Read0x04, mw8080bw_shift_result_rev_r
0x00011Device Writemb14241, mb14241_device, shift_count_w
0x00011Mirror, Read Port0x04, IN0
0x00ffSpecialActive High
0x00021Device Writemb14241, mb14241_device, shift_data_w
0x00021Mirror, Read Port0x04, IN1
0x0003SpecialActive High
0x000cLanguageActive High
0x0000EnglishActive High
0x0004GermanActive High
0x0008FrenchActive High
0x000cDanishActive High
0x00005000Active High
0x00107000Active High
0x00209000Active High
0x0030Test ModeActive High
0x0040Coin 1Active Low
0x0080Button 1Active Low
0x00031Mirror, Device Read0x04, mb14241, mb14241_device, shift_result_r
0x00031Writedesertgu_audio_1_w
0x00041Device Writewatchdog, watchdog_timer_device, reset_w
0x00051Writemidway_tone_generator_lo_w
0x00061Writemidway_tone_generator_hi_w
0x00071Writedesertgu_audio_2_w
Memory Area:main_map
Address RangeLengthFunctionDescription
0x0000-0x1FFF8192ROM, Write NOP
0x2000-0x3FFF8192Mirror, RAM, Shared0x4000, , main_ram
0x4000-0x5FFF8192ROM, Write NOP
 

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
0x0000-0x07FF20489316.1hCRC(c0030d7c) (Fluke: E0D9)
0x0800-0x0FFF20489316.1gCRC(1ddde10b) (Fluke: 09C9)
0x1000-0x17FF20489316.1fCRC(808e46f1) (Fluke: AD62)
0x1800-0x1FFF2048desertgu.eCRC(ac64dc62) (Fluke: 45E4)
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