Welcome to the forums.
Power drives was one of my favorite subjects at Uni but alas I don't do proper engineering now.
I hope you get the Cyrix up and running, feel free to ask for any advice on the forums.
I'm doing a clear up of all my old electronics myself and was surprised at what I found - I even still have some old ISA cards (Sound, SCSI etc). I put an AMD KII computer on ebay and it sold for £5 LOL.
Oh, also I am jealous - I wish I had access to a CNC mill