See this QEMU CPU models text file at QEMU's Git repository for lists of CPU platforms that the software used to work on (As guest PC's). But I think it doesn't mean that it emulates those CPUs. It's impossible to find any information anywhere that shows which of the old x86 CPUs (Pre-2000's) that QEMU has emulated. So it probably never existed at all. ObiKKa (talk) 16:39, 29 November 2018 (EST)
Oh, that was an accident because I clicked on the Edit tab button over an old revision page to revise something else and after submission, it seemed to keep that old PCjs's ordering. I was checking so many revision pages, I didn't arrive at the Read page here before editing. ObiKKa (talk) 16:30, 3 December 2018 (EST)
IBM PC models
I saw this list of maybe the whole range of the IBM PC models from the profile page of a MAME developer, Wilbert Pol. They can be added to the official page here. -ObiKKa, 13 December 2018.