test-drb

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101090 discussions

by jnc＠mercury.lcs.mit.edu

> Subject: Does anyone actually have a KT11-B? > Date: Fri Sep 30 19:04:47 CDT 2016 > the ones shown in the images show it to be (mostly) an RK11-C. > ... > I say "mostly" because there appear to be extra cards on the right hand > end; whether those are some sort of upgrade to the RK11-C, or whether > someone just stored spare Flip Chips out there, I have no idea. So this mystery has been solved (sort of). According to some drawings I have, there is apparently something called a "Double Buffer Disk Control" variant of the RK11-C. I looked online, but there was nothing about it there, and the RK11-C Engineering Drawings at BitSavers don't cover this variant. Does anyone out there have one of these? Noel

8 years, 5 months

Doug Englebart - mouse!

by c.murray.mccullough＠gmail.com

Today in the age of pointer-graphics, ie., using a mouse, is a very important day: Nov. 17, 1970, Doug Engelbart, of SRI, Menlo Park, CA, invented the mouse or granted a patent for "X-Yposition indictator for a grahics display." BTW he doesn't know who coined the word 'mouse'. Happy computing! Murray :)

8 years, 5 months

HP 6954A Multiprogrammer

by pete＠petelancashire.com

I just picked one of these up the 1991 catalog describes HP 6954A Features A Rugged Rack-mountable Test System in a Single Unit Built-in HP 9000 Series 310 or Series 332 Computer. and 20 Megabyte Hard Disc Includes BASIC and HP 14753A CAT Programming Package HP-IB, HP-HIL, RS-232, Audio and Video Interfaces .... Anyone have a manual on this guy ? So far I can't find where the hard drive goes, was it internal or external via GPIB ? BTW mine is older, the CPU is a 310 (98561-66515) -pete

8 years, 5 months

SPRAGUE capacitor for Tektronix 4051.

by mark＠markesystems.com

From: Mattis Lind <mattislind at gmail.com> Subject: SPRAGUE capacitor for Tektronix 4051. > One of the DC filter capacitors has gone open circuit in my Tektronix > 4051. > It is a SPRAGUE 9600 uF - 30VDC with a little bit unusual foot print. Check out www.cedist.com - they have a pretty good assortment of these old-style capacitors available. ~~ Mark Moulding

8 years, 5 months

tumble under BSD

by aek＠bitsavers.org

Out of curiosity, has anyone ever gotten Eric Smith's tumble pdf creation program running under any version of BSD? I ran into a problem porting it to OS X, in the way it used rewind() and was wondering if anyone else ran into that on other BSDs

8 years, 5 months

eBay: 1982 Prime Computer

by cctalk＠ibm51xx.net

Could ?be a number of things. Usually the seller has setup the wrong email address in eBay. I.e. they put in an email address for their PayPal account that does not match the actual PP account. If he is real a quick call to eBay will get it fixed.? -------- Original message -------- From: Jay West <jwest at classiccmp.org> Date: 11/16/16 12:30 PM (GMT-08:00) To: "'General Discussion: On-Topic and Off-Topic Posts'" <cctalk at classiccmp.org> Subject: RE: eBay: 1982 Prime Computer So I took a chance..... Seller hasn't responded to any of the previous emails, nor have they acknowledged the purchase in any way. Something I have never seen before in all my ebay transactions... when I go? into ebay instead of a greyed out $ symbol (unpaid) or black $ symbol (paid)... it has an hourglass. Hovering the mouse said "your payment is being processed". Kinda odd since the payment was from paypal funds already on account. So I logged into paypal.... Paypal says "eBay - fishslayer40 at XXXXXXXX (redacted) hasn't accepted yet." Google shows no trace of that email address and while not a red flag, usually something is in the search results for someone's email address. I have never seen where paying someone on ebay via paypal required them to "accept the funds". They just "get them" I thought. Crossing my fingers.... J

8 years, 5 months

OT- PBS tonight...Watch TV along with Ed# Recording studio history... Thi...

by COURYHOUSE＠aol.com

Ethan thanks for the heads up on this I will check them out! In a message dated 11/16/2016 12:59:39 P.M. US Mountain Standard Tim, ethan at 757.org writes: > PBS tonight...Watch TV along with Ed# Recording studio history... This > is the sounds of our music! - check your time guide for AZ pm - however > calif and others can differ Soundbreaking - Painting with Sound #102 Tuesday, > November 15, 09:00 pm on 8.1 ((AZ TIME Othere state PBS check your Sched. > Duration: 0:56:46 Description: Learn how the recording studio itself became > an instrument. From the advent of magnetic tape, chart the evolution of > multi-track recording and the ingenuity of artists such as the Beatles, Beach > Boys, Pink Floyd and Fleetwood Mac. > http://www.azpbs.org/previews/play.php?vidId=9753 If you're into this, you should also check out the documentary Sound City. Also there is a Muscle Shoals recording studio documentary as well that is on NetFlix. -- Ethan O'Toole

8 years, 5 months

OT- PBS tonight...Watch TV along with Ed# Recording studio history... This is

by COURYHOUSE＠aol.com

PBS tonight...Watch TV along with Ed# Recording studio history... This is the sounds of our music! - check your time guide for AZ pm - however calif and others can differ Soundbreaking - Painting with Sound #102 Tuesday, November 15, 09:00 pm on 8.1 ((AZ TIME Othere state PBS check your Sched. Duration: 0:56:46 Description: Learn how the recording studio itself became an instrument. From the advent of magnetic tape, chart the evolution of multi-track recording and the ingenuity of artists such as the Beatles, Beach Boys, Pink Floyd and Fleetwood Mac. http://www.azpbs.org/previews/play.php?vidId=9753

8 years, 5 months

General TC11 DECtape diagnostic/formatter questions

by derschjo＠gmail.com

Hi all -- I'm working on getting a TC11 + TU56 running at the LCM+L. We plan to use it as a tool for various archival and restoration efforts. After restoring the power supplies, I have it lashed up to a PDP-11/44 -- I know this is anachronistic, but it's been a workhorse machine with ethernet and SCSI, which makes it very flexible. So far, so good. I have RT-11 running and it can read and write tapes, although the left TU56 transport seems to be a bit marginal. I am running into a couple of issues, and I'm curious if anyone else out there has experience here and might be able to shed some light before I spend a lot of time on it: 1) In bringing the TC11 up, I've been attempting to run the TC11 diagnostics, with mixed success. ZTCB runs, but reports an error with the ENDZ status bit not being set properly. So far as I can tell, ENDZ *is* being set on normal operations, but I haven't exhaustively debugged the controller yet. The other four diagnostics (ZTCA, ZTCC, ZTCD, and ZTCE) do nothing when run -- nothing is printed and there is no response. If I run them on SIMH configured as an 11/44, I see the same behavior. If I run them on SIMH configured as an 11/20, then I get the printout described in the documentation and listings. (See bitsavers -- http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp11/xxdp/diag_listin…). I haven't yet dug in to see what accounts for the difference -- any ideas? 2) I'm looking for means to format DECtapes on the TC11. I have a few marginal tapes and I'd like to see if reformatting them brings them back to life. The maintenance manual only indicates "a special program supplied with the TC11 system," and I haven't managed to find it. I *have* found this: http://mirrors.pdp-11.ru/inf.informatik.uni-stuttgart.de/pdp11/dtf.mac which I've assembled and run on RT-11 and it goes through the motions of writing out the timing and mark tracks, but when it goes through the second pass to write out the block numbers it fails immediately, with either status 001207 (indicating a "Data Missed" error) or 020033 (Mark Track Error). I haven't yet hooked up a scope to see if the T&M tracks are *actually* being written, but given my experience with the diagnostics in (1) above, I'm not averse to thinking there may be more than meets the eye with this issue. So in a nutshell: Anyone used a TC11 on a later PDP-11 (like the 11/44)? Anyone have any thoughts on the diagnostics and formatter issues? Thanks as always, Josh

8 years, 5 months

NCD19 / Xncd19

by seefriek＠gmail.com

> Is the 701 based on the RacerX from LSI? Good question...nice shout-out for an obscure MIPS variant. The Explora 700 is, however, not a RacerX, but an R4700. With up to 256MB of RAM. Which is nice. KJ

8 years, 5 months

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