SpeedFix

SpeedFix is a fan-made unofficial patch for DOS Supaplex, which was released as alternative exe file. SpeedFix was made by Herman Perk. SpeedFix source code was fundamental for later projects like Megaplex and Megaplex Online. There have been 6 major versions. Megaplex Online honours SpeedFix by starting its own version numbering from 7, as a way to convey direct continuance.

Herman Perk decompiled the original DOS Supaplex executable and added many improvements, most notably game speed control. On more recent hardware the original Supaplex ran at twice the intended speed due to complicated reasons explained in SpeedFix documentation. The main goal of SpeedFix was to make the game run at the correct speed everywhere, hence the name, but it includes a myriad of new options and fixes.

HPerk accepted code contributions from Maarten “Elmer” Egmond for version 5 of SpeedFix.

SpeedFix has been decompiled by Cillié Malan. His assembly code is avaliable on Github. https://github.com/cilliemalan/supaplex