Comments on: Xilinx CPLD XC9536 replacement PLA for Commodore 64

By: e5frog

e5frog — Thu, 02 Jul 2015 12:30:19 +0000

According to tests the 7ns chip and the 15ns chip behaves the same. Here’s the resulting opinion:
“These will only work with boards 250425 and 250466 because they have built-in RC filters on CASRAM. Boards 250407 and 326298 are NO GO with these PLAs!”

I guess you need to add extra RC filters for the 250407 and 326298 boards.
The XC9536XL is pin compatible but is made differently so it can’t be programmed with the jed file for the obsolete XC9536 – need to get hold of author and have him/her build the project for the XL – and then consider the voltage difference as well.

By: e5frog

e5frog — Sat, 03 Jan 2015 01:28:09 +0000

I ended up using a 15ns, seems to work fine, haven’t tried it much, I have it as a backup if I should need it.
I had no problems using the .jed file directly in ISE iMPACT and program the circuit through a cheap parallel-port adapter, well almost no problems there was a windrvr6.sys problem, TOP2004 eprom programmer needs one and ISE iMPACT needed another one – took a while to figure out.

By: w3drk

w3drk — Fri, 06 Jun 2014 23:29:46 +0000

Just tried this with a 5ns part…no go. Cartridges kind of work but are all garbled.

I’m had to use ISE iMPACT to record the .jed to an xsvf file which I then programmed to the CPLD using the Xilinx XSVF player on a Beagle Bone Black.

Could one of the authors comment on how they accounted for the timing variations of XC9000s that are available so maybe I could tweak the project to get it working on a 5ns part?

Thanks!

By: e5frog

e5frog — Sun, 27 Oct 2013 18:08:21 +0000

I wonder if the speed of the xc9536 is important, pictured is the 7.5ns version, will a 5ns, 10ns or 15ns work as well?

By: Massimiliano

Massimiliano — Thu, 06 Jun 2013 14:25:37 +0000

Ciao!
mi piace lo stampatino nelle foto dell’articolo, è in vendita? dove/quanto/come?

Grazie!

P.S.
Una PROM NON è una PLA!

By: xAD / nIGHTFALL

xAD / nIGHTFALL — Sat, 27 Apr 2013 20:22:08 +0000

@Chris Vasquez

The best PLA replacement is here: http://www.manosoft.it

By: Chris Vasquez

Chris Vasquez — Sat, 27 Apr 2013 18:24:07 +0000

I suspect my PLA is bad in my 250425. I get power, screen black. Is there a chance that I would fry this replacement PLA if I swap and turn it on? And, if it works, are there known issues with scene demos or games not functioning as expected?

Thanks!

Chris

By: xAD / nIGHTFALL

xAD / nIGHTFALL — Wed, 13 Feb 2013 10:58:20 +0000

@Jason

Hi , i don’t have the code, but a good place to try is this:

http://www.fpgaarcade.com/parts.htm
http://www.fpgaarcade.com/c64_customs.html

By: Jason

Jason — Wed, 13 Feb 2013 01:06:58 +0000

Do you have the Xilinx code dump for this?

By: xAD / nIGHTFALL

xAD / nIGHTFALL — Tue, 27 Nov 2012 22:58:58 +0000

Ciao Lorenzo,

Il PLA Clone per riparare il Commodore 64 (vecchio modello) e l’SX64 lo puoi trovare qui:

http://www.manosoft.it

By: Lorenzo

Lorenzo — Tue, 27 Nov 2012 22:52:27 +0000

i want know if is possible buy it please tell me ok bye thanks

By: xAD / nIGHTFALL

xAD / nIGHTFALL — Fri, 20 Aug 2010 19:36:05 +0000

@Paulo The Only (and easy) way is buy a new Commodore 64C via Ebay (10$-25$)

By: Paulo

Paulo — Fri, 20 Aug 2010 15:05:25 +0000

OK!
Do You know where I can buy one for the version of my board?
Obrigado! ;)

By: xAD / nIGHTFALL

xAD / nIGHTFALL — Thu, 12 Aug 2010 07:41:50 +0000

@Paulo hi Paulo, if you have a Commodore C64C the PLA chip is different, you can't use this one.

By: Paulo

Paulo — Wed, 11 Aug 2010 23:02:38 +0000

I have a C64c damaged and I think this chip is malfunctioning.
My board is PCB ASSY No. 250469 / 25311 Rev.3
Where can I buy one?
Thanks