Re: MK14 schematic revisions
Yes, I agree. I'm now starting to pull together the necessary parts.
Ironically, I have most of the 'hard' parts since I've long held an SC/MP II, an INS8154 and a display as spares for my original MK14.
I also have a spare set of programmed PROMs, I bought a pair of blank DM74S571s for what I thought was the expensive price of £6 each about two years ago - I would probably be lucky to buy blank DM74S571s for double that now.
Really the only 'hard' part I don't have is the RAM, and there Ian has provided for the possibility of using an alternative type of device.
I have some 74LS365s, the equivalent of the much harder to find 80L95, and I'm sure I have some 74LS157s because I bought a small quantity of those when one of the ones in my original 48K Spectrum went down.
7445, 7408s could prove harder to find, although I haven't really looked yet.
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