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SiriusHardware · 2nd May 2020, 5:24 pm

The National Semiconductor 'Introkit' (also based on the SCMP 1) used an MM5214 PROM which also requires a minus supply. Quite a difficult machine to build an exact clone of, purely on availability of parts.

2nd May 2020, 5:24 pm	#12
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,575	Re: Good review of SC/MP. The National Semiconductor 'Introkit' (also based on the SCMP 1) used an MM5214 PROM which also requires a minus supply. Quite a difficult machine to build an exact clone of, purely on availability of parts.