Well, interesting.
I've got the CP/M release, from 1985, with the manual etc, which I have used on my PCW.
On PCs, I've mainly used Microsoft C 5.0 and now 7.0
I take it this version is a 'cross-compiler', i.e. you run the system on a PC (8086) but the 'target' is the Z80 (I assume still CP/M).
Anyway, I've downloaded the .ZIP, and unpacked it OK, although there's some problem with some long filenames that irritate my old version of PKUNZIP, and I didn't bother to mess with JZIP which would have been OK. All the 'working' files seem to be 8.3 filenames, these are OK. The long ones are some .PDF files with I guess all the docs, I'll need to see what's in these.
Anyway, the files I see are NOT disk images, but the straight file set. The .PDFs are pretty large, all the rest look totally normal size. No .DSK. I've just unpacked unto my main XP machine, but I have three working pure 100% DOS machines (two with MSDOS 5.0, one with 6.2) so I should have no problem getting the system working. There are some 'extra' progs there to check out, versions of standard utilities like DUMP (not sure if this is a DOS or the CP/M version).
I'll check out the docs (.PDF files) and see what info is there.
Geoff