Re: PLA replacement for C64

From: Jim Brain <>
Date: Sun, 26 Apr 2015 21:18:05 -0500
Message-ID: <>
On 4/25/2015 5:51 PM, Daniel V. Mackey wrote:
> At 06:22 PM 4/25/2015, you wrote:
> I bought 12 of those a couple years back, UNLESS they are fixed 
> nothing would work on the I/02 DF00.
If folks are interested in testing, I can ship a unit out for folks.  
Just let me know.  I did not use the shadowfall project, but created my 
own and used the equations in RealPLA (modified for Verilog and I 
decided to do the delays by running the signal through internal buffers 
in the CPLD rather than an R/C network as in RealPLA.

I can add more delay on the lines via backfeeding it through more 
buffers.  The CPLDs are -7ns, so that's basically my resolution.


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Received on 2015-04-27 03:00:06

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