29 Dec
2005
29 Dec
'05
11:54 a.m.
Patrick Finnegan wrote:
On Thursday 29 December 2005 14:09, William Donzelli
wrote:
Well I guess it is rather hard to make OLD TTL.
Well I want LDL logic... Light emiting diode logic ... The diodes in
the chip glow
when active. The DIP even has the Nand Symbols and conections printed
on it.
I guess
they are so secret that they never made it to the surplus
market.!
I would bet there are a few nuts with stuff like this in garages as
well.
But there is NO POINT in making new TTL.
Of course, the real bitch about doing a fab in your
garage, as opposed
to most classic computing, is the really high temp furnaces, and the
rather toxic chemicals you have to use. I'd imagine that you could get
in a lot of trouble with, eg, the EPA (or maybe even the DHS nowadays)
if someone found out you were doing a fab at your house, in the US.
Heck, you can't even have a DIY web page up even as a JOKE. Lighting a
BBQ with LOX was
a great page! The chemicals would be the bitch -- all trade secrets, not
the fab itself.
Pat
But I do expect there is a list of often needed old TTL,RTL & DTL to
keep classic hardware running.