In order to check a PLA replacement you could reading it like a 512kB EPROM (with an adapter for PLS100N) and compare it against a genuine PLA readout (or the file written by the small program on zimmers). We use the same method to check if all PLA variants in our switchable PLA replacement are correct: We use an adapter to read it like a 27C800 EPROM and compare it against a correct file. /Frank On 24.05.2020 18:47, dave_m wrote: > Gentlemen, > Another issue with that JED file is that there are no test vectors included > in the file. That means there can be NO verification of proper output states > after fusing. The Verification test may pass, but nothing is really tested. > > The output pins can not be tested by the PLA Programmer without test > vectors. Any output pin may be dead and no one can tell after fusing. The > first 'test' then is when the PLA is placed on the board and run > operationally. > > If someone has a Truth Table of the 16 inputs vs the 8 outputs for all 48 > Product Terms, the Test Vectors can be created. > > > > -- > Sent from: http://cbm-hackers.2304266.n4.nabble.com/ > >Received on 2020-05-30 01:49:45
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