[sdiy] Protected PAL/GAL reading service?

[Terry Shultz]

Hi Tom,

If polyfuse is blown, then it becomes a bit more difficult obviously.

Schematic of circuit is handy to ascertain output polarity needed on pins and assign names etc.

Logic analyzer is very handy to see input / output clocking and timing.

I have not worked with older pal technology since working at PPG in 1984 as newer technology was available over time.

I sold my Data I/O about 20 years ago , so I would have to see what tools are still usable and available at the lab at Freescale.

Perhaps others have tools and can comment.

Best regards,

Terry

Sent from my iPad

On Feb 17, 2013, at 4:05 AM, Tom Arnold <xyzzy at sysabend.org> wrote:

> On Sun, Feb 17, 2013 at 02:52:57AM -0800, Terry Shultz wrote:
>> Curious question
>> 
>> Do you know if the security fuse has been blown?
> 
> 99% likelihood.
> 
> Basically two courses of action, draw out the schematic and work out what
> the chips are up to or interrogate the info out of the chips.
> 
> Course #1 is not my favorite as I will have to depopulate the boards to
> work that out, which is next on my list of things to do but I'd like to
> know I had working PALs first.
> 
> Course #2 is fairly easy-ish.  If I can't find a service to do it for a
> reasonable price I can put toegether something to do it.  Just rather save
> the time right now...
> 
> -Tom
> 
> 
>> On Feb 16, 2013, at 3:51 PM, Tom Arnold <xyzzy at sysabend.org> wrote:
>> 
>>> I have a couple 16L8 PALs I need the contents of.  Can anyone recommend a
>>> service for doing this sort of recovery?
>>> 
>>> I have most of what I'd need to do it myself, but in the interest of time
>>> I figured I'd see how much a place would charge to do it for me.
>>> 
>>> Thanks!
>>> 
>>> -- 
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> -- 
> -----------------------------------------------------------------
> - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org 
> - SynthGeek        -  "...is it a virus, a drug, or a religion?"
> - K6AET            -  Juanita Shrugs. "What's the difference? 
> --------------------         -- Neal Stephenson,  Snow Crash
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