-----Original Message-----
From: Ethan Dicks <ethan_dicks(a)yahoo.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, November 05, 1999 8:17 AM
Subject: expanding PDP-8 memory (was Re: Finally got a "straight" DF32
yesterday)
--- John B <dylanb(a)sympatico.ca> wrote:
> >--- Mike Ford <mikeford(a)socal.rr.com> wrote:
> >> >More Paper tape software...
>
> If the paper tapes have anything PDP 8 on them I can send you a copy. I
have
the PDP-8/S
already hooked up to my PC (positive level converters ;-) )
Great.
One other thing.... you mentioned you wanted to
add more memory to one of
your straight 8s.
Not quite. I have no interest in adding more memory to the Straight 8s. I
was contemplating either replacing a core stack in an -8/L with battery-
backed CMOS static RAM to free up a core stack for my -8/i, or adding 28K
of
CMOS static RAM to the -8/i. This is all to be able to
run OS/8. I know
the Disk Monitor will run in 4K.
Okay...
> I have two studies done by the McMaster University on
> building core memory expanders for the 8,8/s using straight 8 memory
(8/s,8
used the same
kinds) and some flip chips.
Interesting.
Very.. very nice.. makes it easy to ad memory. I also got a copy of the 8K
RIM loader and 8K binary loader.
You might want
to kill one of your straight 8s for the memory...
A straight-8 still isn't worth as much whole
as it is in parts.. Ugh..
I'm not completely convinced about that. I might be, but as the "first 8",
there's a certain aura that goes with it.
I do appreciate what you are saying about "aura". Some people like to own
the first. I have a population problem and have owned too many "firsts"
including univac stuff.
But, one the Straight 8 stuff - one sold on ebay this spring, complete
untested for $1400 (but in great cosmetic condition) on eBay... they are
getting more for Altairs :-(. I am picking up at least one over the next
three weeks in MINT condition and I have a friend that wants one bad (I
won't part with my 8/s) so I will sell it to him around $1000. The first PDP
8 was made for many years as DEC had problems with memory on the 8I. I have
scrapped quite a few 8s (I am sure rack straight 8s as I have found front
panel PCBs in my storage for them) over the years as I at the time I did not
like 12 bit computers at all.
(here is where I know large rocks will be thrown at me - I'm ready.. ;-))
A straight 8 in pieces is worth a lot more. You can sell the front panel on
eBay for at least $250. Then, toss the core memory out of it for souvenirs
and get an easy $500 - even maybe sell it to someone who needs it. You then
could get a few hundred for the chassis (if its table top) from someone on
eBay who wants to convert a rack mount unit. Sell the flip chips away or
keep them as spares and you are way head of the standard $1400 for an 8.
Original documents command good $$ too on eBay. A lot of folks have straight
8s which seems to be keeping the prices down.. it would not surprise me if
there was a few hundred in the States alone as there are 8 "mint" running
units in Australia! Abundance of a model dictates it's value.. ie: A LINC-8
and a PDP-8/S exists in very low numbers and fetch a lot more $$$. I've been
talking to some folks on here about the $$ of old machines to get an idea of
what "deep pockets" and collectors value the machines at.. and have found
that I still can't get much for a Straight-8...
But HEADS-UP - Some of these old ultra-rare minis are commanding some
serious $$$. I was offered $12,000 and $15000 (this one wants to make
another offer) for my 8/S (running) with docs and software in mint
condition. I refused both offers (these were two eBay deep pockets that
found me by looking at my "About Me" page.). I don't know what a LINC-8 in
mint condition running is worth but probably more....
Another HEADS-UP - Honeywell 316s - Not whole but in parts. One of my 316s
was carted to the dump this spring but spares for the machine are fetching
big $$$ from those who want to hang up on their wall a piece of "ARPANET".
The core memory gets at least $1000 CAD for the set and CPU boards/micropacs
are fetching at least $60 US EACH!. Front Panel - no idea but probably a
couple hundred. You can't get $4000US for a 316 whole but you can if you
kill it.
In my defense for such actions I do have/had "population" problems with some
mini models.. The IBM 1130 took up the entire first floor of my parents home
(it had every accessory), it was scrapped. I had 16 large racks of
316/ARPANET type stuf,Singers, Olivettes, etc... There is only so much one
person can handle and "funding" is required for new loads of minis.
You might want
to think about doing that as it is nice to keep the same
boards/technology in a transistor computer like that.
I have every interest in keeping the technology "pure". It's the M-series
-8s that I'm considering polluting with modern parts.
That's good. I like to keep transistor computers all transistors and tube
computers all tubes...
-ethan
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