In case someone is interested I made some progress in specifying the Diablo 1 archive format:
https://github.com/savagesteel/d1-file- ... /DIRBIN.md

Hi, I'm trying to figure out the Diablo 1 archive format and also the graphics included in the archives. The archives come as .DIR + .BIN files (e.g. LUMP.DIR and LUMP.BIN). The .DIR file contains file names, the file offsets in .BIN file and the file size. I'm still missing some details, but basica...