22 May
2000
22 May
'00
11:21 a.m.
On Mon, 22 May 2000, Cini, Richard wrote:
It's that time of year again, when I think about
designing an Altair/IMSAI
work-alike. Now that I have the ability to generate schematics/layouts, I
may actually try it.
Anyway, some parts have become scarce, so I would have to use substitutes.
For example, Jameco no longer carries the 8T97 buffer/driver. As I recall
the 8T97 is an LS373 without the inverter on the gate *and* is faster and
has a higher drive current. I've heard that the MC6887 is a sub, but I can't
find a datasheet on it.
Ummm... has the T.I. 74LS367 gone extinct? We always used that as an
'exact match' sub. Same for the 74LS368 as a EM sub for the 8T98...
Many (most?) S-100 boards/kits/etc. used these parts interchangeably.
-jim
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