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

Changelog:
* 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
o Maria cycles are now enabled by default (option 0x1 now disables Maria, the opposite of before)
o 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
o 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)
o Midnight Mutants has less graphical glitches
o Summer Games has less graphical glitches
o Plutos has slightly less graphical glitches
* Fixed save/restore state issue for games that use RIOT timers.