bummer
> The code relies on old internal Infocom toolchains (ZILCH compiler, WATFOR,
> mainframe environment) that are not open and likely not preserved.
I hope some of those other Infocom tools eventually get open sourced for historic curiosity, but ZILF is probably going to remain the modern answer for how to compile these files.
How bad is it? I mean you have the source, it could be ported. Or am I completely misunderstanding and you specifically want the old toolchains, in which case A respectful moment of silence for compilers lost.
Speaking of porting I have always vaguely wanted to port the original basic version of ultima, I mean never enough to actually do it, but I like the idea of the source being available to do so. even if it is just an accidental artifact of how it was made.