Some very old, expensive, and interesting computer items on ebay.

[Stonethrower]

If it came with a certificate of authenticity

I never saw such a paper. Paper, right?
How I can be sure that certificate itself is not cloned?

StoneThrower
www.dgmicrosys.com

 

[Trevor Wilson]

Kids don't appreciate the value of collectables -- when my brother was
a teenager he once used part of my dad's coin collection to pay for a
pizza he ordered -- at face value of course.

**Oops. Kinda like my grandmother. She took a considerable number
(around 30 - 40, as I recall) of mint condition Australian Sovereigns
down to the bank, where they dutifully gave her face value (1 Pound = 2
Dollars each) for the coins. Back when she did it (my old man hit the
roof) the collector value would have exceeded $100.00 each. YIKES!

 

[Yaputya]

It was easy to hack.

Certainly was.
I used a MicroBee to record lap times of speedboats. I burnt an EPROM
with the code (both BASIC and machine code routines) and put it in the
ED/ASM EPROM socket of the MicroBee.
The Microbee is still a good option for simple control projects, it uses a Z80
which can be programmed in machine code if required. It is similar, although
far less powerful, to the Maximite computer and its clones.
http://www.dontronics-shop.com/olimex-duinomite.html

If you have an old Microbee you can keep in touch with the community....
http://www.microbee-mspp.org.au/forum/index.php

If you haven't played asteroids on a MicroBee you haven't lived!

 

[Paul]

I never saw such a paper. Paper, right?
How I can be sure that certificate itself is not cloned?

StoneThrower
www.dgmicrosys.com

Certificate of Authenticity was very much a 90's thing, until M$oft and
Intel then started doing it I doubt anyone actually had even thought of
them, except for pop memorabilia.

--
Paul Carpenter | [email protected]
<http://www.pcserviceselectronics.co.uk/> PC Services
<http://www.pcserviceselectronics.co.uk/fonts/> Timing Diagram Font
<http://www.gnuh8.org.uk/> GNU H8 - compiler & Renesas H8/H8S/H8 Tiny
<http://www.badweb.org.uk/> For those web sites you hate

 

[Trevor Wilson]

The Intel 4004 is probably worth a bit as well.....being the first uP.
http://en.wikipedia.org/wiki/Intel_4004

You could have sold an original 8086 CPU to NASA a few years ago for
use in the space shuttle program! It seems they had to use old technology
CPUs because of the exhaustive quality control regime involved in putting
a shuttle together.

Amongst the 'old crap' that I have discarded and now regret is a
Texas Instruments SR-71 (I think) calculator (it did square roots!)
and a HP 41C which I didn't intend to dump, but went missing during
one of my relocations. I've still got the programming cards for
the magnetic card reader, useless as they are!

There is a MicroBee community out there as well, determined to keep
Australia's own PC alive.
http://www.microbee-mspp.org.au/forum/index.php

**Makes me wonder what my Faber Castel 2/83N is worth. Should be a small
fortune.

 

[Rene]

**Those words probably apply to 90% of the people who read these groups.
My collection of 1,200 baud modems, 386 laptops, 256k RAm chips, 28 year
old CD players, Sony Beta machines, 20MB hard drives and valves are
surely going to be worth something. Actually, some of my crap is
(finally) starting to become valuable (I have a nice assortment of quite
valuable vaccuum tubes). SWMBO calls it "junk". She knows nothing.

I used to be one of these 90% until 2010, in that year I had a big clean
up in my house, threw virtually everything away apart from a very
limited number of items I *really* like, and this made me feel sooo
good! Space itself really feels better than heaps of old crap that take
it up.

Rene

 

[yaputya]

I used to be one of these 90% until 2010, in that year I had a big clean
up in my house, threw virtually everything away apart from a very limited
number of items I *really* like, and this made me feel sooo good! Space
itself really feels better than heaps of old crap that take it up.

Rene

If you have lived in the same place for decades it is easy to accumulate
and keep junk that may eventually be worth a buck or two. If you put a
cost on the storage space, most stuff is not worth it. But you rarely
know what is going to appreciate in value beforehand.
If you have moved house several times you have probably had to
make some hard decisions - I threw out one of the early prototype
Microbee's with 64k static RAM, because it was shit compared to
the PC-clones available at the time I was moving. I would have kept
it if I hadn't been under the pressure of moving to minimise junk.

It gets much worse if you have to move overseas..........

 

[rickman]

Geez! Shouldn't have thrown out all that old crap years ago!
I had an 8008 CPU, and probably some other vintage stuff. Hmmm,
wait, I think I still HAVE an 8008 and matching EPROMS, etc.
in an old prototype I made.

Jon

I've got some 8008 CPU chips somewhere along with a MARK something
computer sold as a kit I finished putting together. A professor gave it
to me when a grad student couldn't make it work. Seems there were a
number of errors in the design that I had to fix. I modified it to work
with an RS232 terminal rather than the 110 baud current loop for
teletype it came with. That likely wipes out any "collectable" value
for it...

I guess I could part it out, how much are 1702A EPROMs going for?

Rick