[Info-vax] VMS Alpha emulator

[John H. Reinhardt]

On 5/27/2021 8:40 AM, Dave Lightman wrote:
>   SC> Your question is unclear, so for the benefit of anyone who might know:
>   SC>
>   SC> Are you talking about doing FPGA work under VMS or are you talking
>   SC> about FPGA implementations of the architectures that VMS runs on ?
>   SC>
> 
> Indeed.
> 
> The question was meant to ask if anyone knew of any recent FPGA projects that
> emulate PDP/VAX. I'd be interested to run twenex / vms on one to compare it
> to simh/charon.
> 
> I doubt I would mess with it, but if there were FPGA verilog/vhdl tools on
> VMS, that would be an interesting bit of information as well.
> 
> Thanks!
> 
> dave
> 

I don't know of anyone doing the VAX architecture in a FPGA.

One of the most popular (and best) PDP-11 implementation in FPGA is the PDP2011 project of Sytse van Slooten at https://pdp2011.sytse.net/wordpress/

There are a couple of others:

W11 - <https://wfjm.github.io/home/w11/>
POP11 - <http://labo.nshimizu.com/pop11.html>
Verilog PDP-11 - <http://www.heeltoe.com/download/pdp11/README.html>

Some haven't been active in a while.  The PDP2011 project is active and Sytse is always working on improvements.

-- 
John H. Reinhardt