Reconstructed Commander Keen 1-3 Source Code

Summary

It's not quite Christmas time yet, but since these are the days of Keen's 35th anniversary, I thought it was a good opportunity to finally release this to the public: Reconstructed Commander Keen 1-3 Source Code This package contains full source code for all versions of Keen 1-3 that I know, from the November 1990 beta version of Keen 1 to the relatively obscure Precision Software Applications release (version 1.34). Compiling the source code with the correct compiler and assembler versions and compressing the resulting executables with LZEXE or PKLITE (if necessary) generates executables that are 100% identical to the original files. You will need Turbo C++ 1.00 (not 1.01!) and Turbo Assembler (2.0 or above) to compile exact copies of most versions of Keen 1-3 (versions 1.31 and earlier). The later special releases (the "pre-registered" Gravis version 1.32 and the PSA release version 1.34) require Borland C++ 2.0 for a fully identical copy. --- If you have read the timeline.txt file I released along with my Reconstructed BioMenace Source Code last year, you might have noticed an entry that said "got side-tracked revisiting another old project". This is that project. Most of the Keen 1-3 code reconstruction was done back in early 2021, before I started preparing my reconstructed Keen 4-6 source code for release. The big problem that prevented me from getting my Keen 1-3 code to compile and compress into 100% identical copies of the original executables was the fact that I didn't have access to the right compiler back then. I only had Turbo C++ 1.01, which generates slightly different code than Turbo C++ 1.00. It was impossible to get Turbo C++ 1.01 to produce the code that I needed. Another contributing factor is that the order of the uninitialized variables in the so-called BSS segment depends on the names of the variables when using Turbo C++ 1.x to compile the code. And since some of these variables need to be accessed from within the assembly code, I couldn't si...