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TonyDuell · 1st Jul 2015, 5:45 pm

I have just looked at my MK14 board again.

It clearly says 'Issue IV' on the solder side. It does have the holes for the Maplin-type keyswitches (same as the reset button). It does not have any connections to the fingers of the rear edge connector on the solder side. The top side carries the SC/MP I/O lines (the 3 flags, the 2 sense inputs and the bit-banged serial lines) and the ports of the (optional) 8154. The data and address buses are not brought out as standard on this issue board.

1st Jul 2015, 5:45 pm	#9
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,215	Re: The Sinclair / Science of Cambridge MK14 I have just looked at my MK14 board again. It clearly says 'Issue IV' on the solder side. It does have the holes for the Maplin-type keyswitches (same as the reset button). It does not have any connections to the fingers of the rear edge connector on the solder side. The top side carries the SC/MP I/O lines (the 3 flags, the 2 sense inputs and the bit-banged serial lines) and the ports of the (optional) 8154. The data and address buses are not brought out as standard on this issue board.