19 Dec
2006
19 Dec
'06
2:54 p.m.
Date: Tue, 19 Dec 2006 10:30:36 -0700
From: Richard <legalize at xmission.com>
In article <458726D7.17136.1434D6AA at
cclist.sydex.com>,
"Chuck Guzis" <cclist at sydex.com> writes:
Is there a guide somewhere to the different families of logic, such
as RTL, TTL, LSTTL (never heard of that one) and CMOS? I was
choosing some simple logic components for my IIfx SIMM project the
other day and was somewhat bewildered by the choice of input/output
levels. Also, some are Schmidt Triggered?
My understanding extends to the idea that there are differences in
how they (at what voltage) interpret the low and high states but
beyond that, I'm ignorant.
Anyway, before I go on a Google hunt (which will probably turn up all
the surplus electronics suppliers and pricegrabber links first) does
anyone already know of a nice educational source on the topic?
Jeff Walther
But, given that the original uses RTL and core,
what's the point of
building one in LSTTL?
Is it even possible to build with RTL parts anymore?
I guess you'd have to do it PDP-8 style with discrete transistors?