Reproducing old machines with newer technology (Re: PDP-12 at the RICM)
paulkoning at comcast.net
Tue Jul 14 11:29:39 CDT 2015
> On Jul 14, 2015, at 12:23 PM, ben <bfranchuk at jetnet.ab.ca> wrote:
> On 7/13/2015 10:02 AM, Paul Koning wrote:
>> A different approach is to reproduce the actual logic design. FPGAs
>> can be fed gate level models, though that’s not the most common
>> practice as I understand it. But if you have access to that level
>> of original design data, the result can be quite accurate.
> The big assumption here, is the software will NOT change the logic model
> and the details are vender specific. Altera software is BAD for doing this.
So now I know two reasons not to use AHDL. :-)
Yes, it does require that the synthesis software doesn’t have major bugs. And of course, the model has to be sufficiently constrained that it steers the synthesis correctly.
In my case, I haven’t reached that point yet. My models currently only run in simulation (GHDL to be specific).
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