Re: SuperPET 6702 IC

From: Jim Brain <brain_at_jbrain.com>
Date: Sun, 1 Jan 2023 00:30:21 -0600
Message-ID: <62fd5cca-cdac-14bc-9289-a994f3eaffe0_at_jbrain.com>
On 12/31/2022 4:10 PM, David Roberts wrote:
> I thought I had commented the transistor schematic as to how it 
> 'worked'. I will double-check myself tomorrow...
I'll admit I didn't read the entire doc, just perused it and thought, 
"hmmm, I'd need to get this into a bit higher level notation and then I 
thought I'd later see if there was an alternate way to quickly get there 
to then create the Verilog.
>
> This is pretty much 8 parallel shift registers each consisting of 8 
> bits. The registers can be preloaded.
That would be an xc9572xl, which I have a ton of here (long time ago buy 
at a good price).  I'm interested in synthesizing it, but it would be 
nice if someone could help me get it into logic element notation.
>
> Each chain of registers can be shortened from 8 bits and there is the 
> usual "end around shift" with an xor gate.

Jim
Received on 2023-01-01 08:00:01

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