Re: PLA replacement for C64

From: Clockmeister <>
Date: Mon, 27 Apr 2015 11:17:21 +0800
Message-ID: <>
On 27/04/2015 10:18 AM, Jim Brain wrote:
> 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.

Nice work Jim, as always.

       Message was sent through the cbm-hackers mailing list
Received on 2015-04-27 04:00:06

Archive generated by hypermail 2.2.0.