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Old 9th Apr 2019, 12:56 pm   #35
SiriusHardware
Dekatron
 
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,485
Default Re: MK14 programming interface - MK2

JHB, thanks for the links: On a short lunch break just now so I will take a longer look tonight.

Tim, with regard to the possibility of the '365 causing slower keypad response, if you have a spare and you intend to send your INS8154 to me for testing anyway (as per PM) then send me a spare '365 as well and I will drop it in and see if it 'breaks' the much faster keypad response my original machine seems to have.

I also wonder whether that big display is loading the eight display common drive lines (shared with the keypad) in a way which wouldn't happen with the original calculator display - does that have any on board buffering or is it just a passive drop-in replacement for the original display?

Also the 7408s - are they actually 7408s or 74(something)08 on your JM machine?

I have to say I had no idea what a minefield I was getting into here before I stepped on it. I had hoped that these machines were so simple that no replica would be very much different from an original.
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