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TonyDuell · 1st Jul 2015, 7:57 pm

If you're not careful, though, you end up with a VDU which is nothing like SOC designed. Now, I've designed, repaired, etc all sorts of VDU systems from the simple (did one in 3 standard ICs once) to the very complex (one I have here has over 3000 DRAM chips and about the same number of logic ICs). So yet another doesn't really interest me.

But a logic-wise copy of the original MK14 one might do.

As for the character generator, it can't be hard to work out a suitable bit pattern for a character font and blow it into some kind of PROM or EPROM.

1st Jul 2015, 7:57 pm	#13
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: The Sinclair / Science of Cambridge MK14 If you're not careful, though, you end up with a VDU which is nothing like SOC designed. Now, I've designed, repaired, etc all sorts of VDU systems from the simple (did one in 3 standard ICs once) to the very complex (one I have here has over 3000 DRAM chips and about the same number of logic ICs). So yet another doesn't really interest me. But a logic-wise copy of the original MK14 one might do. As for the character generator, it can't be hard to work out a suitable bit pattern for a character font and blow it into some kind of PROM or EPROM.