Fw: Deck of IBM PLAYING CARDS GOES FOR $325

[Roy J. Tellason]

On Sunday 18 December 2005 03:22 am, Chuck Guzis wrote:
> On 12/17/2005 at 10:37 PM woodelf wrote:
>
> sites.
>
> >I  downloaded some motorola application notes from bitsavers.
> >Wow they sure had a  lot of  different types of  TTL. I wonder how only
> >the 74xx became the only TTL used today?
>
> I think the short answer is "second sources"--you had at least 4 big
> players, TI, National, Moto and Fairchild all producing 7400-series logic.

I read somewhere recently (another list) where Fairchild had their own 
proprietary numbers out before that,  8xxx or 9xxx or something?  And then 
there's DTL,  I have *no* idea how those are numbered.

> Some of the earlier TTL (Moto 400/500-series) had mid-line (pins 4 and10)
> power supplies, which turned out to be not as convienient for PCB layout.
> And, although it's largely forgotten, 7400 TTL shares a fair number of
> pinouts with the older DTL circuits.

For a chart that may be of some use (and which is continually being updated), 
have a look at http://yourpage.blazenet.net/rtellason/parts.html and the 
"by-generic-number" chart in particular.

Hey,  I guess this is my first post to this list -- I've been hooked in for a 
week or two more or less.  I thought that I was way ahead of a lot of the 
folks I encounter in other contexts with regard to older hardware,  but some 
of you folks just blow me away!

Got lots of old machines,  my first being an Osborne Executive with an 
external "Design One" hard drive box,  WD1000 controller card in there that I 
hope still works,  that one used to support George Peace's old RCPM system 
but with a different HD in it where the bearings went bad.  Making that work 
with an ST225 was fun,  and I never did get the write precomp part of it 
figured out so the last few MB of that drive are pretty much unusable.

Got a number of Kaypros,  maybe six or so.  A Cromemco System Three w/ 
terminal that has some sort of drive problem -- they used incandescent bulbs 
in there for the indes sensors and whatnot,  didn't they?  A vic20 and c64 or 
three, plus a couple of 1541s  and a whole mess of parts for them,  I used to 
make a half-decent living fixing those,  so if anybody needs parts give me a 
holler.  Got a Televideo 816,  which has the only 8" belt-driven HD I've ever 
seen,  though it's unfortunate that the interfaces aren't rs232 or something 
more usable than what's there.  Got a Bigboard II that I built,  but have no 
BIOS or system disks for it.

There's probably some other stuff I'm forgetting,  but I may remember in 
subsequent posts.

I'll no doubt run across some things from time to time that I want to get rid 
of.  Like that Televideo for example,  I don't see that as being all that 
terribly likely to be useful.  Or the couple of Token-Ring cards I have at 
hand here -- anybody want those?  I'll post about some other stuff as I come 
across it or think of it...

Lots of stuff in here I'm seeing mention of that I haven't thought of or done 
anything with in ages.  One hell of a list,  if I can keep up with it!  :-D

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin