On Sun, 16 Aug 2009 09:16:51 +0100, Orchid XP v8 <voi### [at] devnull> wrote:

>OOC, exactly how much space do you recon it would take to build 64KB out 
>of discrete NAND gates?

For memory you could use a D type flip-flop which can be made using 4 NAND gates
and an inverting gate. It would be better to use a Master-slave D type flip-flop
which would double the components. So for each *bit* of memory you would need 2
X 7400s and 1/3 X 7404. or a 7474 or a 7479.

What size of word are you thinking of? IIRC the typical power consumption of TTL
is about 250 ma. You will need a robust power supply.
-- 

Regards
     Stephen

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