test-drb November 2007

test-drb@ccmp.vtda.org

229 participants
508 discussions

Colossus code-breaking again (Jules Richardson)

by mike＠brickfieldspark.org

> Nice article up on the BBC news website about the Cipher Challenge that's > going on today: http://news.bbc.co.uk/1/hi/technology/7094881.stm > ... I've not been involved in that side of things, but it's been > interesting > watching Tony and his crew running around the last few weeks trying to get > everything put together (there was a huge amount to do on the > reception/intercept side of things in particular) > Saw that on BBC 1 news last night, would have liked a … [View More]

17 years, 4 months

Heathkit 89 in Seattle

by tosteve＠yahoo.com

Do not contact me, contact Patrick below: ------------------------- I have a heathkit I think H89, not sure how to tell. Should I dump it or is it worth something to someone? If so feel free to contact me. Patrick Seattle WA p_miceli at hotmail.com --------------------------------- Be a better sports nut! Let your teams follow you with Yahoo Mobile. Try it now.

17 years, 4 months

BBC coverage: Colossus vs. Modern hardware

by rdawson16＠hotmail.com

> Date: Thu, 15 Nov 2007 19:14:48 -0500 > From: wdonzelli at gmail.com > To: cctalk at classiccmp.org > Subject: Re: BBC coverage: Colossus vs. Modern hardware > > > AFAIK there's no transmission equipment as part of the SZ42 itself though, so > > something would still need to be hooked between that and a giant aerial in > > order to do the transmission; I think it was this bit that Will was interested in. > > No, I am interested in the thing that … [View More]

17 years, 4 months

MIT provides MULTICS source and documentation

by compoobah＠valleyimplants.com

On Nov 15, 2007, at 2:28 PM, Chuck wrote: > How about ATAoAL? ATA over Aldis Lamp? Should be doable... > The standard should include a bridge to either Bongo drums or smoke signals. The smoke could be produced by old tantalums to bring it back on-topic.

17 years, 4 months

Drive sizes (WAS Re: MIT provides MULTICS source and documentation)

by compoobah＠valleyimplants.com

On Nov 15, 2007, at 2:28 PM, Roy wrote: > I mentioned it in here because it came up in conversation with > somebody in the > list a while back and they said something about the 1-2G range of > sizes being > particularly useful for some things, though I can't recall at the > moment > just what those things were offhand. > IRIX 4D1-3.3 seems to not like drives much over 1GB, many VAXstations don't like drives over 1.05GB for VMS, SCSI Apollo/DOMAIN systems don't … [View More]

17 years, 4 months

VAX 11/750 Config and Diagnostics, anyone?

by oldcpu2＠rogerwilco.org

Just wanted to update everyone on the status of the Montpelier, Idaho VAX 11/750 that was rescued last month without much in the way of included modules, except for the Systems Industries 9700 controller...and, to ask for some help. After a little effort, I think I now have the minimum boardset required to fire this baby up. But just to make sure that yours truly, a complete Unibus and big-iron VAX noob, has it figured correctly, I wanted to run my configuration by you guys before I … [View More]shoot off my right foot (which would, of course, leave me with only a wrong foot). I've now got the following installed in the backplane: <nothing> in CMI slot 1 (still looking for the optional L0001 FPU) L0002 (DPM) in CMI slot 2 L0003 (MIC) in CMI slot 3 L0004 (UBI) in CMI slot 4 L0008 (PCS) in CMI slot 5 L0006 (RDM) in CMI slot 6 (optional, I guess, but came with other boards) <nothing> in CMI slot 7 (I pulled the SI9700 from this slot) <nothing> in CMI slot 8 <nothing> in CMI slot 9 L0016 (CMC2) in CMI slot 10 M8750 (1MB RAM) in 'extended' slots 11-18 (8MB total) M9202 (Unibus 'joiner') in slots 19 and 20 M7485 (DZ11) in Unibus slot 21 <nothing> in Unibus slot 22 <nothing> in Unibus slot 23 <nothing> in Unibus slot 24 <nothing> in Unibus slot 25 <nothing> in Unibus slot 26 <nothing> in Unibus slot 27 M9313 (Unibus Term) in Unibus slot 28 I still don't have any mass storage interfaces (to support my RA81 and/or x2 Fujitsu SuperEagles...still looking for UDA50, Dilog DU256, and/or Emulex UD33), but I was hoping that I have enough modules to start testing the CPU, anyway. I do need to review Ethan's earlier comments about properly jumpering the now empty CMI slot 7, but I'll do that before I power up. Does this look like a reasonable config for now, at least to start testing the CPU? Also... I have successfully cobbled a cable between the onboard TU58 drive (using external power) and a PDP-11/23+. (Yes, I could have used a PC with John Wilson's PUTR, but the PDP was handy...the cable works either way.) I have managed to image the four carts that were part of the rescue. So at least I know that the TU58 is operational. They're probably already 'out there', but for what it's worth, if anyone wants a copy of these images, let me know... BE-J844Q-BE VAX FORTRAN V4.4 BIN TU58 1/2 BE-M873G-BE VAX FORTRAN V4.4 BIN TU58 2/2 BE-CJ51E-BE VAX FORTRAN V4.4 BIN TU58 1/1 [help files, I think] Systems Industries 9900 VAX/VMS Installation Package v4.0 After reading through the various docs found on bitsavers.org and vt100.net/manx it appears that a standard set of TU58 DECtape II carts were included with each system. Several of these carts contained CPU and system diagnostics. I'm hoping someone has a set of these tapes imaged somewhere that I could download and give a try. According to the VAX 11/750 HW Installation and Acceptance manual, the tapes with diagnostics are: Tape 5: - ECKAL - Cache/TB - ECKAX - Cluster Exerciser - ECKAM - Memory Diagnostic Tape 6: - ECSAA - Diagnostic Supervisor - ECCBA - UBI/DW 750 Diagnostic Tape 7: - EVKAA - Hardcore Instructions Tape 8: - EVKAB - Architectural Instructions - EVKAC - Floating-Point Instructions - EVKAD - Compatibility Mode Instructions - EVKAE - Privileged Architectural Instructions Can anyone help me out? Thanks. - Jared [View Less]

17 years, 4 months

cctalk Digest, Vol 51, Issue 47

by compoobah＠valleyimplants.com

On Nov 15, 2007, at 3:22 AM, Chuck Guizis wrote: >> Which reminds me of a comment I saw somewhere about the possibility >> of having >> a SCSI bus with more than one host adapter on it. Is that even >> possible? Supported on (some? all?) Alphas for clustering.

17 years, 4 months

What is an Epson BM5?

by ard＠p850ug1.demon.co.uk

Can anyone tell me anything about the Epson BM5 floppy drive unit? Perhaps a little description will help. Physcially it's about the size of an Epson TF20 and has one vertically-mounted half-height floppy drive on the front, along with a power LED. On the back are the usual mains connector and switch and a DB25 socket. The unit splits into 3 main sections, PUS, controller and drive The PSU consists of a mains transformer and a PCB cotnaining an STK7561 hybrid chip. It claims to give … [View More]

17 years, 4 months

Commodore 65 = $5,000

by jvdg＠sparcpark.net

> Tony Duell wrote: > >> However, I am saddened by a classic computer that will never be turned on >> again. Computers are not fine art, they are machines that should be run >> (and for that matter, I feel that fine art should be viewed, not stored >> in a vault). > > As much as Tony is a hardware guy, I'm a software guy on the other end > of the spectrum. And yet I wholeheartedly agree with this, to the point > where pretty much all of my … [View More]

17 years, 4 months

DDC Fixed Head Disks

by leeib＠sequan.com

I was reading your thread about DDC head-per-track drives. I had a friend around 1980 that had one of these drives which he had obtained as surplus from the US Air Force. It used helium atmosphere around the disks to reduce friction. The disk was 12" in diameter and spun at 33,000 RPM (not a typo), and so it would produce considerable heat from friction if ordinary air were used, at least that's what I heard at the time. It was intended as a substitute for magnetic core (RAM) for … [View More]

17 years, 4 months

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test-drb November 2007