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101090 discussions

RX50 / RX33 Questions related to PDP-11's

by CLASSICCMP＠trailing-edge.com

>However, no matter what I try I can't get them (RX33's) to work when the ESDI >controller is in place. On that note I'm giving up on this line of attack >at least for the time being. It sounds to me like you've got a backplane DMA continuity grant problem. What cards are in the backplane? What slots are they in? -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817

27 years, 10 months

System/34 and 36

by rws＠ais.net

Hi everybody, I made my first major equipment move today. It was a System/34 system unit (5340), a System/36 system unit (5360), two band printers (3262), and two tape drives (8809). About 5,000 lb. as near as I can figure. Nothing fell over or hurt anybody- very encouraging for the next move (although now I'm out of room!) My biggest, burning question is this: How do you get those darn covers on the side of the S/36 open? All it has is a little 1/4" long slot. Probing around inside was completely fruitless. I can see a black plastic piece inside through the slot, but pushing, pulling, lifting, or pushing down on it doesn't do anything. Any help would be much appreciated. Richard Schauer rws(a)ais.net

27 years, 10 months

Unibus Emulex board - ID, please...

by william＠ans.net

I am sorting out my DEC cards, figuring out which ones will be included on my upcoming "junk sale" list. I came across a Unibus card made by Emulex, and I can not figure out its model number! It has two 50 pin connectors on the end, along with one red LED and a 4 place DIP switch. Near the middle of the board are two 10 place DIP switches. Notable chips include a 2901, six 24 pin ROMs, a 40 pin DIP with a sticker over it, and lots of glue. What is this thing called? I would like to get a good idea before I stick it into the sale. William Donzelli william(a)ans.net

27 years, 10 months

Ultrix installation media

by sethm＠loomcom.com

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27 years, 10 months

Need Info on DEC 11/84 Board, M8190

by mbg＠world.std.com

>I'm in Ottawa, and on my obligatory trip to the computer salvage place, >picked up an M8190 Unibus 11/84 card. > >It's a 4-finger LSI board, connectors for console and likely a cabinet >kit of some sort. Both connectors connect to the same cab kit... though it isn't required. The console terminal baud rate can be set in the switches on the board, and the on-board LEDs will display the state which would be displayed in the cab kit LED display... >I'd like to try this board, my questions are: > >1. Any other support boards needed, or will this board run standalone, >presuming available RAM? Memory... any qbus memory will do if all you want is to get the machine up and running. A 2x5 to DB25 connector for the console terminal. A console terminal. A disk interface. A QBUS system box, or an 11/84 system box (which is qbus in the first part). >2. What kind of backplane is required? I have an 11/45 backplane but this >wouldn't do because of the extensive point-to-point wiring for the CPU >cards, etc. Sorry, the board plugs into a QBUS portion of the 11/84 system box. It will not plug into a unibus. >3. Any way to run this is the "straight through" section of the Unibus >that exists in the high slot numbers of older Unibus' like the 11/45? Nope... >4. Is anybody else using this card successfully? In qbus machines - yes... several of my systems are 11/83s (KDJ11-B at 18mhz, with PMI memory). I've even modified one to be running at 20mhz (mentioned in another message) -- I call it an 11/83plus. Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 10 months

Need Info on DEC 11/84 Board, M8190

by mbg＠world.std.com

>To further complicate matters, within digital the CPU is identified >differently based on whether it has PMI memory installed or not. >(And, of course, it matters whether the PMI comes before or after >the CPU in the backplane!) So, for example, you may find a 18 MHz >CPU with non-PMI memory called a 11/73, but with PMI memory it's called >a 11/83. In fact... you could find the system with PMI memory, but installed in the wrong place, and it will be identifed - by software - as an 11/73B. If you put the same memory in the right place, it will be identified as an 11/83. >If, indeed, you have the 11/84 capable version, you'll also need the >KDJ11-B and the 11/84 backplane, along with PMI memory, to have a >real 11/84 CPU. But the board with Qbus memory in the qbus of an 11/84 system box should work... I've also taken one of the KDJ11-B 18mhz boards, removed the 18mhz clock and replaced it with a 20mhz clock... the boot ROM correctly identifies the clock speed, and the system runs rock solid... be warned - not all boards will do so, from what I understand... your milage may vary... etc... If you make the change and it doesn't work, don't blame me... (save the old clock). Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 10 months

Need Info on DEC 11/84 Board, M8190

by mbg＠world.std.com

>> Actually, even though it came out of a Unibus machine, it's a Qbus CPU >> card. > >I assume that you mean it's a Unibus version of the 11/73. I can't >imagine that it would be usable in a Q bus backplane. The pinouts are >quite different! Nope, the KDJ11-B which plugs into an 11/84 can also be plugged into a Qbus box and work... The fact is that the 11/84 actually has two buses, the qbus, on which the processor and memory reside (as well as the q-u bus converter), and the unibus, in which the rest of the options reside. (Yes, Tim is right about the official boards which go in specific boxes and are marketed and sold as specific systems) Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 10 months

Need Info on DEC 11/84 Board, M8190

by mbg＠world.std.com

>So this is a Q bus card, that can be plugged into a Q bus backplane >without smoke generation?? Sure is... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

27 years, 10 months

Need Info on DEC 11/84 Board, M8190

by pete＠dunnington.u-net.com

On Oct 17, 15:24, Kevin McQuiggin wrote: > Subject: Re: Need Info on DEC 11/84 Board, M8190 > So this is a Q bus card, that can be plugged into a Q bus backplane > without smoke generation?? It is indeed. -- Pete Peter Turnbull Dept. of Computer Science University of York

27 years, 10 months

Sparc Supply Schematics

by maxeskin＠hotmail.com

Assuming it does you any good -- most of the paths are between the pins of two custom chips! > >> I have a friend who has 6 Sparc SLC's with either dud power supplies or >> monitor sync problems, is the schematics for the power supplies available > >I've found that schematics for modern computer stuff are almost never >available. And it's quicker to figure out how the thing works yourself >(including tracing out any bits of schematics that you need) than to >battle with the so-called technical support line for information ;-). > >-tony > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 10 months

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