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Old 8th Apr 2019, 5:12 pm   #29
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,484
Default Re: MK14 programming interface - MK2

Somewhere in the originial MK14 documentation, the text alludes to the fact that the key row / column matrix can support more than just the 20 keys of the onboard keypad. Once your own software is in control of the machine it is entirely up to you which row / column intersections you look for and how you act upon them.

Slothie's MK14 is of his own unique design so I think he will know how he has routed the row / column lines to the keypad edge connector on his own PCB.

I get the strong impression (admittedly unconfirmed) that Martin's PCBs are near exact clones - possibly from scans - of the issue V PCB and so with any luck the column / row routing to the edge connector on that version is as per the original machine.

That said, there is no guarantee that the keypad edge connector layout remained the same through each issue of original MK14 - I would like to hope so, but I have no idea if that is definitely the case.
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