Electronics > Repair
Datron 1271 repair
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pelule:
High rigrunner,

great job.
What CPU board version do you have?
Is it already a newer one with the U110/PAL 20L8?


BR
/PeLuLe
rigrunner:
Hi pelule,


--- Quote from: pelule on November 10, 2017, 10:18:27 am ---What CPU board version do you have?
Is it already a newer one with the U110/PAL 20L8?

--- End quote ---

I have 400901 V1.9 digital board and the programmable logics are all suffix  10 :-  400902-10, 400903-10 and 400904-10. I think they are all dated 20th June 89 but it's hard to tell from the pictures i took. If i take the covers off again i'll make a proper note of the labels.
Mickle T.:
I have the same 400902/3/4-10 chips, but they are all dated 29th January 92.
pelule:
As far as I have understood Datron part system, the definition of the content is defined by the No (the Datron part number).
The date just gives, the day/date, the PAl is programmed.
So all of the named PALs should have the same content.
/PeluLe
TheSteve:
I have used rigrunner's python script before to dump my 1281 but recently found it didn't match a physical read of the chip. The data was correct but PRIM and SECN data were in the wrong order in the complete nvram.bin file.
I swapped the order when it creates the output file and it now gives me a dump which matches.
I also used it with vxi11 so that line is at the top and can be commented out to go back to a different gpib controller.
I've attached the very slightly changed file.
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