test-drb December 1999

test-drb@ccmp.vtda.org

186 participants
742 discussions

by mrbill＠mrbill.net

Another night of scrounging eBay's "Vintage" category has left me with that urge once again.. so if anyone has a PDP-11 system for sale or trade within reasonable driving or shipping distance of Austin, Texas, please let me know. Bill -- Bill Bradford * mrbill(a)mrbill.net / http://www.mrbill.net mrbill(a)sunhelp.org / http://www.sunhelp.org --------------------------------------------------------------------- "Fear leads to anger. Anger leads to hate. Hate leads to using Windows NT for mission-critical applications." -- What Yoda *meant* to say

25 years

IMPORTANT ANNOUNCEMENT - List changes - Hopefully no more spam!

by dpeschel＠u.washington.edu

Hi, After the recent spam episode and Bruce Lane's frustrated outburst, I have changed the configuration of the CLASSICCMP list. Non-subscribers may no longer send messages. Luckily, when a non-subscriber sends a message, it is returned to them with insturctions about how to subscribe. It is also sent to me. That solves the problem of legitimate non-subscriber messages that I was worried about. In a few cases I will probably agree to forward messages without making people subscribe. There is also a "feature" of the software (I use the term loosely, as with a lot of the other "features") that saves non-subscriber messages, or maybe hashes them and then saves them. If the same message is sent more than once, it simply disappears with no errors. This happens even if the non-subscriber subscribes and then sends the message again. I don't know if it happens if the non-subscriber sends the same message from a different address. The solution (which is explained in the automated reply) is to change the contents of the message and then send it again. Although that is a cute spam-preventing feature, I will probably end up sending reminders to the legitimate non-subscribers so they don't get confused when their messages vanish. I discovered that five people who post here often weren't actually subscribed. I already replied to them personally and apologized for the confusion. Hopefully I'll get fewer bounces after they subscribe. Unfortunately, the requirement that each person must use a specific address is going to become even more annoying; messages from alternate addresses slipped through before, but now they will be rejected. Let me know if you have any other questions. -- Derek

25 years

GRI-909

by aek＠spies.com

FWIW, here is one patent probably on the 909 (3631401) Unfortunatly, IBM doesn't have it on line, nor do they have any mention of the ones for the 8/S

25 years

NTSC sync rate (was Re: Hewlett Packard A2094 Monitor (Standard RGB?))

by dylanb＠sympatico.ca

PDP-8 and other rare mini computers http://www.pdp8.com -----Original Message----- From: Eric Smith <eric(a)brouhaha.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, December 09, 1999 7:35 PM Subject: NTSC sync rate (was Re: Hewlett Packard A2094 Monitor (Standard RGB?)) >"John B" <dylanb(a)sympatico.ca> wrote: >Tony wrote: >> US TV is 15.570kHz, VGA is 31.25kHz or thereabouts. > >John B wrote: >> No, the US TV (NTSC) Scan Rate is 15.750Khz > >Well, if you want to get nitpicky, the NTSC horizontal sync >rate is 15.73425 KHz. I know.. I didn't want to get *picky*.. the vertical rate is 59.94... > >The old EIA RS-170 monochrome standard was 15.750 KHz, but that >is not suitable for NTSC color use. The color burst frequency >is 3.579545 MHz +/- 10 Hz, and the the horizontal rate is required >to be exactly 2/455 of that frequency. Otherwise the color information >will produce luma artifacts and/or interfere with the sound carrier. > >Note that they could have chosen to make the color carrier 3.583125 MHz, >and kept all the video timing exactly the same as for RS-170. Then they >would have had to raise the center frequency of the audio carrier by >0.1%. The FCC apparently would not let them make that change, in the >interest of compatability with existing monochrome receivers (which is >incredibly stupid, since the receivers wouldn't have even noticed), so >they had to lower everything else by 0.1% instead. Thus the need for >disgusting hacks like drop-frame time code. Sigh. > >Eric > > >Reference: _A Technical Introduction to Digital Video_ by Charles A. >Poynton, John Wiley & Sons, 1996 >

25 years

GRI-909

by aek＠spies.com

"I was able to find the sole designer of the PDP-8/S who is now retired, Saul B. Dinman, Product Line Manager, Module Product Line -1966-69 " Interesting reading... The GRI-909 is ALSO an interesting 16 bit machine. There is mention of it in Korn's minicomputer book, and Allen Baum has a little information on it. It would be interesting to find out if Saul has any information on it in his archives.

25 years

Hewlett Packard A2094 Monitor (Standard RGB ?)

by dylanb＠sympatico.ca

-----Original Message----- From: Tony Duell <ard(a)p850ug1.demon.co.uk> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, December 09, 1999 4:58 PM Subject: Re: Hewlett Packard A2094 Monitor (Standard RGB ?) >> >> Subject: Hewlett Packard A2094 Monitor (Standard RGB ?) >> >> >> >> >> I found a Website with the specs on the HP monitor I found. >> Could someone take at look at the specs and tell me if this is standard RGB >> , >> or is it possibly VGA compatible ? > >What do you mean by 'standard' RGB? I can give you a dozen different and >incompatible RGB standards. > >Yes, this monitor has analogue RGB inputs with separate syncs. But the >scan rates are neither US TV rates (which is what the C128 produces) or >VGA. I believe some SVGA cards could drive this given suitable software >(Xfree86 could probably do it if you run linux). > >> >> Monitor Specifications: (From the Website) > >[...] > >> H Frequency : 68.7 > >US TV is 15.570kHz, VGA is 31.25kHz or thereabouts. No, the US TV (NTSC) Scan Rate is 15.750Khz john PDP-8 and other rare mini computers http://www.pdp8.com > >> V Frequency : 75 Hz > >US TV is 60Hz, as is VGA (?) > >-tony > >

25 years

Free: Sun 4/260

by wrking＠tsoft.com

I've picked up a more or less complete Sun 4/260 the other day. (2 deskside cabinets). I haven't powered it on, but the system is complete (excepting the monitor). You can't beat the price (US $0.00). I'm in the San Francisco Bay area. Any takers? Bill

25 years

Done did it.

by netsurfer_x1＠hotmail.com

>Someone responded privately that they found no hits on Deja News. >Here's what I do in a typical search... > >I entered "Commodore Hyperion" (no quotes) in the "quick search" >area at the upper right of their start page. It returned no results. >That's OK. Down below, there's a copy of your query. Change >"Search [recent] messages" to [past], then click "Search" >next to it. (Selecting [all] would work, too.) > >Presto, a bunch of hits. Some are from Dr. Peter Kittel. He >worked at Commodore Germany, it looks like he knows a bit about it. >He'd probably respond to an e-mail if you sent him one. > >- John I done did that already. I was was right too! The C= Hyperion was a Dynalogic/ComTerm/Bytec Hyperion with a Commodore name on it! ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

25 years

I jfound the engineer who DESIGNED THE PDP-8/S

by dylanb＠sympatico.ca

Amazing................................................. I am getting a lot of new documentation which seems to be refute some of the facts on the PDP-8 FAQ. I have been in contact with quite a few retired DEC engineers from the '60s. I was able to find the sole designer of the PDP-8/S who is now retired, Saul B. Dinman, Product Line Manager, Module Product Line -1966-69 I have updated my website with pictures of the prototype PDP-8/S which was built entirely on Laboratory Blue Plug-in Panels (Blue ones - H901) in 1966. I also got a lot more information on the 8/S and will be posting a lot more information on the Patents Saul acquired as a result of the design of the PDP-8/S. Please go to http://www.pdp8.com/ , click on the 8/S picture. and click on the prototype link. Changes to the text are now in Bold. WARNING!!! Pictures are big and take up much bandwidth! I am gathering documentation from prior DEC engineers to make changes to the PDP-8 FAQ. Enjoy! john PDP-8 and other rare mini computers http://www.pdp8.com

25 years

reading tapes in bad conditions

by CLASSICCMP＠trailing-edge.com

>Anybody know some trick to bring back at least part of it? I tried skipping >blocks, records and files without success? I'm using VMS 7.2 and a Cipher SCSI >tape. It depends on the SCSI tape drive's firmware, but with many you'll be able to skip over bad parts with a combination of SET MAGTAPE/SKIP=FILES and SET MAGTAPE/SKIP=RECORDS. If the SCSI tape drive won't let you do this, it's probably because its firmware thinks that a tape error means end-of-tape and won't let you go past. I can't make any other recommendation other than to get a different drive (preferably, something with a "less intelligent" interface. It's rarely good when the peripheral thinks you know better than it what you want it to do!) -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years

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test-drb December 1999