Ok I found more info here:
I was in UM Rolla now Science and Technology, but in 1986-1987 taking computer science classes and pondering getting into electrical engineering. I wanted to go there for computer engineering but they didn't offer it anymore. I was fascinated by the Commodore Amiga 1000 and wanted to design my own computers to run the software and operating systems from other computers. I wanted like an Intel or Mortola for the main CPU and then use 6502, 6809, Z80, etc for the co-processors that ran the old 8-bit software on them.
I now see that VHDL is designing the new chips that run the older software and OS/ROM, but seems to be hard to do because there are physical limitations such as MHz can't be above 50 or 100 in some cases.