I am now working to get MUSS running once again. The work is being done on GitHub. You can find the project here.
The approach is first to hand build a processor to implement the Flocoder FLIP (Form LInear Program) program to extract the MUSL from the documentation, and then build a MUSL compiler that cross compiles to C. This will allow me to bootstrap the building of MUSS. It looks like it may be possible to get MUSS built for PDP-11 and VAX. I also have some floppy disk images for a Motorola 68K system, if I can build an emulator for that system, then this is another avenue for getting MUSS to run once again. I hope one day to be able to get it running on my MU5 Emulator as well.
The sections below explain the current state of the restoration.
I have now got a crude implementation of the Flocoder FLIP program written using Flex and Bison. It can take a Flocoder file from the MUSS sources and extract MUSL code. I have run it successfully over all the Flocoder files for Flocoder itself.
I also have the beginnings of a MUSL compiler. This is hand-translated by adding a second “level” to the Flocoder files for the MUSL compiler sources. The second level is in C and targets cross compiling on Windows. I can use the above implementation of FLIP to generate a MUSL compiler in C. There is also the beginnings of an implementation of MUTL (the target language).
The compiler can currently translate some simple programs into code that runs on the MU5 emulator.