Comment by Findecanor

Alsup liked to write a lot about his my66000 on Usenet, but does not share documents about it with everyone. (Yes, I've emailed him and been ignored. I have had to piece together what I know about it from multiple posts.) Apparently it runs in FPGA and there are assemblers and compiler back-ends for it.

Like the 88000, the register file is shared between integer and floating point units. One interesting detail is that it supports CRAY-style vector operations using the same architectural registers, and downgrades to scalar operation automatically on interrupts. This means that the register state to load/store on context switches is small.