Thread: Mk14 vdu
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Old 11th Nov 2020, 10:44 pm   #889
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,485
Default Re: Mk14 vdu

If you're thinking of making an offboard EPROM / RAM PCB to plug into the issue VI then maybe the really logical thing to do would be to design an issue VI rev 2.0, which would do away with the original onboard 4-bit memories and replace them with 8-bit wide EPROM and SRAM on the main board.

However, don't let us curb your enthusiasm, so by all means make your proposed extension complete with OrtonView. If you do, maybe provide for a dedicated VDU control port / TOP PAGE routing scheme for the VDU and break the 8154 port pins out to a pin row header so they can be used for general I/O as originally intended.
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