1 Nov
2001
1 Nov
'01
12:30 p.m.
Those parts were never cheap!
You can also use 74289s for the '189s. The '382s are an improved version
of the '182. A note, if you can tolerate a slower ALU you can omit the
'382s
and just use ripple carry.
A sub for 74189s is some of the byte wide cache rams from an old 386/486
PC
as the faster ones were faster than the TTL 74189! You dont have to use
the full
space of the cache ram though having it would make afor an interesting
register array.
Allison
-----Original Message-----
From: Ben Franchuk <bfranchuk(a)jetnet.ab.ca>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Thursday, November 01, 2001 8:28 PM
Subject: Re: classiccmp-digest V1 #761
Somebody wrote
> >
> > While I agree that there are a lot of rack-mount random TTL junkies
here,
to
> some of
us, S-100 and things like that are "big iron" as well. =)
>
Hey some of like TTL, too bad you can't get 7400's for 5 cents each
anymore.
I have a great idea for a great LS computer but no 74LS189's or
74LS382's
exist cheap. Ben Franchuk.
--
Standard Disclaimer : 97% speculation 2% bad grammar 1% facts.
"Pre-historic Cpu's" http://www.jetnet.ab.ca/users/bfranchuk
Now with schematics.