[Techtoolslist] leland off road pal dump needed u85

[Steve Larkins]

I believe Tony is using the ABI to dump the contents of the PROM as pointed
out here:

http://www.macros-arcade.com/paldump.htm

On 7 September 2016 at 14:30, Fabrizio Vasile <fabrizio.vasile at gmail.com>
wrote:

> Neither 27C020 EPROM adapter and ABI 4000 can read secured registered
> PLDs.As I said, we can only try to read as PAL16R8 in a regular programmer
> hoping it's unsecured.
>
>
>
> Il 07/09/2016 13:44, tony htbs ha scritto:
>
>> I tried to read it as a eprom did not work
>> And I have a abi 4000 and I can read it
>> I have not been able to compile the file I just get errors trying to
>> convert it
>> Need another program  for conversion
>>
>> Sent from my iPhone
>> Hitech tony
>>
>>
>> On Sep 7, 2016, at 2:45 AM, Fabrizio Vasile <fabrizio.vasile at gmail.com>
>>> wrote:
>>>
>>> Unfortunately there is no way to reverse registered secured PLDs thru an
>>> automated process.All you can do is study the behaviour of the device and
>>> try to reproduce it manually.Anyway, about this Leland Offroad Track Pak
>>> PAL16R8, try to read it in a standard EPROM programmer which supports this
>>> device, it could be unsecured.
>>>
>>>
>>> Il 07/09/2016 03:17, John Robertson ha scritto:
>>>
>>>> On 03/16/2015 1:49 PM, Fabrizio Vasile wrote:
>>>>>
>>>>>
>>>>> Il 16/03/2015 21:33, Clay Cowgill ha scritto:
>>>>>
>>>>>> I was aware of this possibility of dumping PLD like a normal EPROM but
>>>>>>> there could be issue with some programmers.
>>>>>>>
>>>>>> Shouldn't be.  It's a five volt part and since you're not writing
>>>>>> data to
>>>>>> the part the lack of OE shouldn't be an issue.  (I suppose if you were
>>>>>> particularly concerned you could just buffer the output pins with a
>>>>>> '244
>>>>>> connected to the 2716's CE's and OE.)
>>>>>>
>>>>> /*I mean the programmer you are going to use for dumping a PLD as
>>>>> EPROM must *//**//*actually drive the pins both high and low for this to
>>>>> work.Some programmers only drive LOW the pins and use pull-up resistors to
>>>>> force them HIGH.
>>>>>
>>>>> Anyway, like Charles MacDonald explain here:
>>>>>
>>>>> http://dreamjam.co.uk/emuviews/old2009.php
>>>>>
>>>>> you can also read a PAL as a 27C020 EPROM using this simple adapter:
>>>>>
>>>>> http://dreamjam.co.uk/emuviews/temp/adapter2.png
>>>>>
>>>>> *//*/*You will get a 256KB dump that can be analized with his
>>>>> analysing software in order to recompile equations in a GAL16V8
>>>>> replacement*/
>>>>> */
>>>>>
>>>>>> -Clay
>>>>>>
>>>>> Back to reading PALs.
>>>>
>>>> On a customers Leland Offroad Track Pak I have a PAL16R8 (08-2) to
>>>> read, and it was suggested here that the 16R8 could be read with the
>>>> correct technology:
>>>>
>>>> http://marc.info/?l=classiccmp&m=141212179614845&w=2
>>>>
>>>> So, has anyone here found a way to read the registered PALs? Or do I
>>>> just need to look a little harder on MAME to find the decrypted PAL images?
>>>>
>>>> Thanks,
>>>>
>>>> John :-#)#
>>>>
>>>
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