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What is Wii7800?
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Wii7800 is a port of the ProSystem emulator developed by Greg Stanton.
Additional changes developed by Ludovic Jacomme aka Zx-81 (PSP port), Leonis,
and gdement.

[https://home.comcast.net/~gscottstanton/]

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Change log
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03/29/10 (0.3)
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    - GX based scaler (smoother scrolling in Plutos, Xevious, Motor Psycho)
    - Ability to adjust screen size to any size/dimensions via the
        "Screen Size" option under "Display". If this is entered after
        loading a cartridge, the last frame will be displayed to assist in
        sizing.
    - Fixed graphical glitches in Ballblazer
    - Implemented RANDOM (read) and SKCTLS (write) for Pokey sound emulation
        - Ballblazer now plays all sounds
    - Minor refactor of Pokey code
    - Some minor adjustments to the Light Gun related code
    - Updated palette (from Underball)
    - Updated menu code, GX rendering of dip switches and debug information
    - Ability to set HBLANK period, Dual-analog support in ProSystem database

06/29/09 (0.2)
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    - Lightgun support
    - High score cartridge support
    - Increased accuracy of Maria cycle timing, games now run at close to
        their intended speed (One on One, Tower Toppler, Summer Games,
        KLAX, Karateka, etc.)
    - Increased compatibility for PAL games (Ballblazer, Commando, and Food
        Fight now work)   
    - Audio now sounds as it should regardless of frequency (PAL games and
        custom frame rates)
    - Timers now properly take into consideration cycles generated via Maria
        and during WSYNC
    - Changes to ProSystem database format
        - Maria cycles are now enabled by default (option 0x1 now disables
            Maria, the opposite of before)
        - Ability to adjust the lightgun crosshair offset per game
    - All games now have Maria cycles and WSYNC enabled in the ProSystem
        database (with the exception of MIA)   
    - Console switch defaults updated to work with the majority of games
    - Additions to debug output (Maria vs. CPU cycles, timer info, etc.)
    - Other games improved by various changes
        - Kung Fu Master no longer has the lines in the upper left corner of
            display and the Fuji logo appears as it should (if using BIOS)
        - Midnight Mutants has less graphical glitches
        - Summer Games has less graphical glitches
        - Plutos has slightly less graphical glitches
    - Fixed save/restore state issue for games that use RIOT timers.               

05/26/09 (0.1)
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    - Snapshot support, including auto-load/auto-save
    - Optional loading of 7800 BIOS
    - Support for ProSystem emulator database
    - Detects and configures controls for one and two button 7800 games
    - Controls support for Wiimote/Nunchuk/Classic/Gamecube controllers
    - Analog controls support
    - Dual analog support for Gamecube/Classic controllers (Robotron)