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101090 discussions

IBM 4506 Digital TV display unit (System 360 peripheral)

by steven＠malikoff.com

I was going through some items of my fathers-in-law and found a photocopy of a 1972 conference paper that mentions the IBM 4506 Digital TV display unit being used by reporters and editors at the New York Times. These and other terminals (2741 I/O selectric, 2265 VDU) were connected to a 360/40. Apparently they could take a TV camera input as well as output from the Mod 40, and had a keyboard. I found the article pdf online, it was 'System quality through structured programming' by FT Baker, 1972 at https://www.computer.org/csdl/proceedings/afips/1972/5080/00/50800339.pdf My google-fu hasn't found any picture of the IBM 4506 or even a reference outside this article, and I'm mildly curious as to what they looked like. Anyone? Steve.

7 years, 4 months

MPE versions

by couryhouse＠aol.com

I? ?remember? giving the database? some? w/? ?Orley? Larson? ?in Brighton UK? when I was there? giving? invited? paper on? FORUM/USA.... ---Ed Sharpe In a message dated 5/7/2019 1:35:00 PM US Mountain Standard Time, cctalk at classiccmp.org writes: Thanks for the awareness. TurboImage Release History - get it while available!https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c020… Keven Miller ----- Original Message ----- From: "Frank McConnell via cctech" <cctech at classiccmp.org>To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>Sent: Mon 06 May 2019 05:02 PMSubject: Re: VMS versions On May 6, 2019, at 15:48, Antonio Carlini via cctalk wrote:>> On Mon, May 6, 2019, 5:17 PM Zane Healy <healyzh at avanthar.com> wrote:>>>> It would be nice to see this through 8.4-2L1 (I think that?s the latest>> version).>>>> Zane>>>> There used to be an article about OpenVMS release history, naturally it's > been wiped. Likewise, there used to be an article about MPE release history.? Links I know for it are: <http://community.hpe.com/t5/General/MPE-Release-History/td-p/4075425> (20 Aug 2014)<http://h30499.www3.hp.com/t5/General/MPE-Release-History/td-p/4075425> (28 Apr 2016) Naturally it?s been wiped, and archive.org *doesn?t* have a copy, even though they have other pages under that t5/General directory in both cases. -Frank McConnell

7 years, 4 months

VCF Southeast Photos

by silent700＠gmail.com

Last weekend I made an unannounced visit out to Roswell, GA to visit our brothers-and-sisters-in-hoarding at the Vintage Computer Festival Southeast. They were hosted by the new location of the Computer Museum of America, not yet open to the public. The show was a solid representation of the hobby, with a wide range of micros, minis and workstations as well as a few calculators and computing ephemera. On the museum side, I've never seen so many Crays in once place - and they're not even done yet! Here is my photo set: https://photos.app.goo.gl/aiKGadREX511xeUt5 (contains computers, computer collectors and one giant rabbit) Big thanks to Earl and the gang for putting on another great VCF and showing me that southern hospitality. More VCF Midwest news coming soon! -j

7 years, 4 months

MPE release history (was: Re: VMS versions)

by jnc＠mercury.lcs.mit.edu

> From: R. Stricklin > I saved a copy in 2012. ... Grab them while you still can. The tendency of links to go bad is momumental; the probability of it happening over long time periods seems to asymtotically approach 1.0. So everyone ought to make a habit of down-loading a copy of anything they have an interest in; the existence of multiple copies seems to be the best safeguard that material will not be lost. Noel

7 years, 4 months

LA50 and Computest Docs wanted

by ard.p850ug1＠gmail.com

Firstly, does anyone have the printset (schematic) for the DEC LA50 printer? It's not on Bitsavers and I can't find it anywhere else. Secondly (and more interesting/less likely to be known) I have a thing here called a 'Computest 3020'. It seems to be a luggable data logger. A case, very deep from front to back, with a carrying handle. The front hinges down and contains a keyboard, this reveals a monochrome monitor (about 9" diagonal CRT) and a pair of half-height 5.25" Teac floppy drives. Inside there's a logic board that slides in from the back. It contains a Z80A, boot ROM, 64K DRAM, a pair of 8251 USARTs (oddly, only one is brought out to a connector, there is a single DB25 on the back), Intel 8276 video chip, Western Digital FDC (I think 2797, but don't quote me!) etc. It plugs in on what seems to be separate sets of edge fingers for the floppy drives, keyboard, monitor and a 50 wire link to the motherboard that is located above this logic board. The motherboard has 8 edge connectors for '64 channel switch' PCBs (look to be analogue multiplexers, full of 4052s), a 'measurement PCB' (ADC, etc) and a 'control PCB' which I think is to control the thing you are taking measurements from, it has 3 DE9 connectors). Anyway, I can't find anything about it with Google. Manuals would be useful the software disks (which I don't have) even more so. -tony

7 years, 4 months

RT-11 doesn't recognize my 3.5" floppy

by charlesmorris800＠centurytel.net

I have installed an RQDX3 and the M9058 distribution board in my 11/23+. Since I don't have a 5.25" drive yet, I hooked up a 3.5" HD (1.44 MB) drive >from an old PC. After a struggle (which I documented on VCFED's DEC forum), I managed to get all the jumpers and cables set correctly, and now my XXDP diagnostics (ZRQA?? ... ZRQF??) recognize the drive as an RX33 (DU0:, logical drive 0 since no hard disks are attached). It passes all the tests, and I can INIT, DIR, and copy files to it using the limited OS with the XXDP suite. The LED on the RQDX3 blinks once when the drive is accessed. So far so good. But, when I boot the system (with RT-11SJ V5.01), it can't see the drive at all. Attempts to access it result in the command hanging indefinitely, the drive does not select, and the RQDX3 lamp flashes rapidly. SHOW DEV:DU does say that the handler is installed for the correct 172150, 154 location. However, SHOW DEV:DUn where n=[0..3] displays two blank lines then back to the dot prompt. Is my version of RT-11 just too old to recognize an RX-33? If so, what do I need to fix this? Presumably a later DU.SYS? Thanks for any help. Most of my experience is with PDP-8's so this is slow going... -Charles

7 years, 4 months

RCA Spectra 70 manuals on Ebay

by mattislind＠gmail.com

Maybe of interest to someone? I didn't find the Cobol manual on Bitsavers. https://www.ebay.com/itm/372663250835

7 years, 4 months

PM2390 Clock and Sector writer

by anders.k.nelson＠gmail.com

Found on eBay: https://www.ebay.com/itm/223506026636 I suppose Kyroflux and other open-source hardware/software combos can do the same thing? -- Anders Nelson +1 (517) 775-6129 www.erogear.com

7 years, 4 months

1A ESS track writer

by aek＠bitsavers.org

https://www.ebay.com/itm/223506026636 If anyone happens to have a (probably) late model 1A ESS laying around. Note the late 80's date stamps.

7 years, 4 months

Old CE manuals

by cctalk＠emailtoilet.com

I sent a mail to Al at aek at bitsavers.org on 4/11 regarding a bunch of IBM manuals. http://www.myimagecollection.com/manuals/ Never heard back so they went into the trash. These manuals are decades older so I don't want to trash them. If Al jumps in here, fine. He can get them. Otherwise, based on timing, Bob gets them. Donald

7 years, 4 months

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