In part 1 of this mini-series, we saw how to diagnose and correct the issues preventing an old computer game (Star Trek Armada) from starting on modern (Windows 7) systems. In part 2 we saw how to find the game loop and introduce our own code to slow it down so that the game’s native timing code would work properly.
This third and final post brings closure to the STA reverse engineering by enabling multiplayer saves and presenting a combined diff file for all of the patches we have made in this and the previous posts.
Fix #4 – Enabling Multiplayer Saves
Star Trek Armada is buggy; merely allowing the game to minimize (say, due to a screensaver turning on or alt-tabbing to another program) can cause it to crash. The game also suffers from multiplayer synchronization issues. Ideally, if we could figure out how to save and load multiplayer games, it would allow players in a multiplayer match to continue from a recent point when a problem occurs during gameplay.