Re: An Alternative to x21
Dave Lowry wrote:
>
> Those who do not subscribe to Dr. Ting's Forth Engines
> newsletter may not know that he has reverse-engineered
> MuP21. He has written, in Verilog and VHDL, a 16 bit
> "clone". At present, it's just the CPU, no video.
>
> I have synthesized the VHDL version, and run it in a
> Xilinx gate array at about 25 MHz. This is not too
> terribly far from the real-world performance of the x21
> chips running out of DRAM. Plus, the chip seems to
> perform much more reliably than MuP21.
>
Is there a potential interim "product" in this, perhaps for sale through
Jeff's store, to help Dr. Ting and Jeff fund and forward their MISC
efforts?
Lloyd R. Prentice
