As the title suggests, I have a PSS (Problem Solver Systems?) RAM65
S-100 static RAM board. No documentation. Anyone have any
docs/schematics/info about this?
I ask because I need to configure it, plus a chip appears to be missing
> -----Original Message-----
> From: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Al Kossow
> Sent: Friday, January 16, 2009 9:45 PM
> To: classiccmp at classiccmp.org
> Subject: hams on classiccmp
> > Wonder who else?
> probably lots..
> Eric Smith just got his licence.
> I know Don North is, as am I (wb9ggj)
Andrew Lynch, 73 de N8VEM
If you can't arrange a group buy and you don't mind white/unprinted
then I could send you a couple of rolls; I don't see myself doing
anything with my PPT perfs and readers any time soon - think of
it: loading Vista from PPT... ;-)
Email off-list if interested.
Date: Wed, 25 Feb 2009 20:47:09 +0100
From: Henk Gooijen <henk.gooijen at hotmail.com>
Subject: 1" paper tape buy ?
I was searching for a company that sells 1" unoiled paper tape, here
in The Netherlands. No luck. After googling and many pages, I found
a company in the USA: http://www.wncsupply.com/paper-tape-rolls.html
I would like to buy one or two rolls of 1000 ft, order# 0400A,
R-V-PU471 Unoiled / Printed Top Arrow yellowish color, but it comes
in either a package of 28 rolls (1) and weighs 40 lbs, or in a quart
package, 7 rolls, still a weight of 10 lbs. The 7 rolls package costs
$80. That OK, but the shipping costs would make it quite expensive.
My question is simple.
Are there people on this list who also want to buy some rolls of 1"
nice looking yellow paper tape? I would take 2 (or 3) rolls.
Hint: Get a paper tape reader from an old CNC machine from eBay.
(I bought one for $30 and another for $79 two weeks ago). You can
interface such a reader to a computer, in my case the SBC6120 !
Think of it ... booting the SBC6120 from a paper tape. Is that cool?
The site also sells nice reels (http://www.wncsupply.com/reels.html).
I wanted to buy the 4" blue ones, but again shipping costs, aarggghh.
However, a nice lady from the company emailed me that she is looking
into the shipping costs, as the costs quoted on their site is a bit
I hope to hear from one or two people also looking for a few paper
tape rolls ... Please contact me off list.
Links to other companies that sell 1" paper tape are also welcome!
- Henk, PA8PDP
I was just browsing around on UP and found
I took the test and got 0x72, "operator", not bad for being born after
half the things mentioned were retired :)
"I've tried programming Ruby on Rails, following TechCrunch in my RSS
reader, and drinking absinthe. It doesn't work. I'm going back to C,
Hunter S. Thompson, and cheap whiskey." -- Ted Dziuba
I was always under the impression that when Intel moved to a CMOS
manufacturing process for the 8088/8086, they fixed a bug regarding a
repeated LODSB with a segment override -- that the REP prefix was
ignored (bug) in the old 8088s, and was honored (correctly) in the newer
chips. So a simple routine to try to identify the 8088 vs. the 80c88
would look something like:
mov cx,2 ; test if following instruction will be
; repeated twice.
db 0F3h,26h,0ACh ; rep es: lodsb
jcxz Yes ; intel non-CMOS chips do not care of rep
jmp Nope ; before segment prefix override, NEC and
; CMOS-tech ones does.
If I run this on my 5150 with (C)1978 8088, I see the bug (cx does not
update). If I run this on my 5160 with "80c88" printed on the chip, I
do not see the bug (cx goes to 0). So all is well, right?
Well, I use this routine in a detection library for a project I recently
completed(*) and someone is claiming that the code is broken. It
reports an 80c88 when the chip is *not* marked 80c88, but rather "8088
(C) 1983 Intel". So what's going on? Is the chip from 1983 actually an
80c88, since it doesn't have the bug? Or did Intel fix the bug before
moving to a CMOS manufacturing process?
(*) project is a CGA compatibility testing program; you can grab it from
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
Help our electronic games project: http://www.mobygames.com/
Or check out some trippy MindCandy at http://www.mindcandydvd.com/
A child borne of the home computer wars: http://trixter.wordpress.com/
Hi! What are acceptable voltage supply ranges for an S-100 power supply? I
am assuming 115VAC input. My intended application is a small home brew
I have seen the S-100 voltage rails vary but I believe +15VDC, -15VDC, and
+9VDC would be sufficient. Herb's S-100 page lists the voltages as +18VDC,
-16VDC, and +8VDC but I have seen other voltages used.
Thanks and have a nice day!
The Arlington Museum of Information Technology (AMIT) is sponsoring the first annual Vintage
Computer Fair Light - South to be held in conjunction with The 15th annual Antique Science &
Retro-Tech Show And Swap Meet. The combined event will be held Saturday, March 14, 2009 at the
Ramada Hotel, Irving, Texas, 4440 W. Airport Freeway. from 10:00 am to 4:00 pm. Admission is $5.
AMIT Director Gil Carrick said that this combined event should attract many visitors who are
interested in displaying their vintage computing artifacts or in buying, selling, swapping or just
seeing these artifacts. Vintage Computer Fairs have been held in other parts of the country, but
this will be the first one in the South. Since this is the first of these events in the region, it
will not feature any speakers and will only last one day - hence the term "lite."
Antique Science & Retro-Tech Show And Swap Meet organizer Skip Solberg said that for a decade and a
half the event has been a favorite spot for fans of this antique gear to show, sell and swap their
Visitors interested in displaying or selling should contact Skip Solberg at 817-467-0368 or email
solberg2 at airmail.net for pricing and availability of table space.
If you'd like more information about the Retro Tech Meet, or to talk with Skip Solberg, please call
817-467-0368, email solberg2 at airmail.net or see the web site at
If you'd like more information about the Vintage Computer Fair, or to talk with Gil Carrick, please
call 817-994-9213, email amit at tx.rr.com or see the web site at http://amit-tx.org/.
A. G. (Gil) Carrick, Director
Arlington Museum of Information Technology
1012 Portofino Drive
Arlington, TX 76012
On Thu, 26 Feb 2009 14:18:59 -0700 Mike Loewen wrote:
> On Thu, 26 Feb 2009, Gordon JC Pearce wrote:
>> Didn't someone once work out that to store a single MP3 you'd need a
>> stack of 80-column cards ten miles high?
> Assuming a 6MB MP3 file and 40 bytes per card:
> 6 * 1048576 = 6291456 bytes
> / 40 bytes per card = 157286.4 (157285) cards
> * .178mm card thickness = 27996.73 mm high
> / 25.4mm per inch = 1102.233465 inches
> / 12 = 91.85278871 (91.85) feet
> Mike Loewen mloewen at cpumagic.scol.pa.us
> Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
Umm if you store binary ... that is 80 bytes per card .. 46 feet per file.
Now how many dec tapes is that?
Errr, ISTR that a standard IBM, etc. punched card was 0.0065" thick rather than the 0.007" implied by the 0.178mm, BICBW. Also, since there are 12 rows per column, the most efficient packing technique could store 120 bytes in the up to 960 "bits" (hole positions) in the card.
Using those numbers, I came up with the following:
6,291,456 bytes / 120 = 52,428.8 cards (OK, 52,429)
52,429 * 0.0065 = 340.7885 inches or about 28.4 feet per file.
What an improvement. ;) (Is anyone else bored today?)
I also seem to recall that Univac or some other computer manufacturer actually used a 90 (?) column card for even better packing density. I'll leave that improved calculation to someone who actually remembers how many columns those cards were blessed with.
My email address is csquared3 at tx dot rr dot com