Then it’s even possible to write a short program on most versions of BASIC on most machines, especially as nowhere does it say that the output has to be neatly lined up
Acorn’s efforts to get their machines into the business market were a flop. See here . And Clive knew that trying to get the QL into the educational market would be hard. In the end of course, the QL was not very successful in the business market either. I would not consider the QL to be particularl...
The Sinclair UK700 and UK1200 PSUs are unregulated types, so at anything less than full load, the output voltage will be greater than 9V. 10.5V to 11.5V with an unexpanded ZX81 connected is normal. 7805 voltage regulators typically have an output tolerance of 4% or 3%. The +5V should be within +/-5%...
Definitely looks like a seller trying to get the maximum amount of money from an unsuspecting naive buyer. And “M.O.D” may or may not stand for what you think it does. And I don’t think Sinclair would have produced many hundreds of so called “pre-production” machines, but the serial number is D05-00...