PDP-11

Folks, I have recently a PDP-11 which apparently came from a VAX console. It looks to me like there are two CPU's in there, a console card, RX02 Controller, Memory and Bus Terminator. I have done lots of searching and there doesn't seem to be a simple list of what can run on it, assu

pdp 11?

friend found this now opening channels to rescue it its an 11 of some sort not sure witch one https://scontent-iad3-1.xx.fbcdn.net/t31.0-8/13528577_10154158749830056_6453066395005995961_o.jpg anyone know what a dliiw s/w is? https://scontent-iad3-1.xx.fbcdn.net/t31.0- 8/13528577_1015415874983005

pdp 11/04 and dual pdp 11/73

The "PDP-11/04 and floppy disk" I posted already was claimed by a listmember. But after the fact, the owner sent me a picture. The listmember who is getting it is getting a pretty nice system. One of the dec mid-height cabinets that has the sloped front at the top. RX02 at the top, 1

PDP-11/05 (was: PDP-11/05 microcode dump?)

s), but the chip location (Exx) > numbers are all different. > > For the control board (M7261), the C, E ('early' version) and F ('late' > version) etch revisions each contain mostly the same PROMs, but apparently > with slight differences between the sets of P

PDP-11 Memory

Well, I have decided to stop playing with my hardware for a while and get back to playing with software. :-) In order to do this I am building three (maybe four) PDP-11's. I have an 11/93, an 11/73 and an 11/23+ (and maybe another 11/23 or 11/73). BUt, I have run into a small pr

"industrial" PDP-11

Hey all, I bumped into someone who has some early (mid 1970 on some of the photos I've seen) PDP-11 bits - front panel and a handful of boards (the backplane, PSU, rack, peripherals etc. are long gone). The front panel's branded as "Industrial 11" though, which isn'

PDP-11 Rack

Hi Thomas, I tried to call but couldn't reach you. I think I can have it picked up before then, but have a few questions. Thanks, Paul 217 766 7690

PDP 11/15

I bought a large package of DEC gear last year and it came with a PDP 11/15. I have no need for this classic, and put it on the list. A few people responded, but because of my problems, I never followed up with them. For those who responded, I apologize for dropping the ball. If anyone is

PDP-11 Overlays

Recently, there have been a number of references to using overlays on the PDP-11. There have also been strong suggestions that overlays were structured differently under the 3 operating systems: RSTS/E, RSX-11 and RT-11. Obviously, I understand how RT-11 overlays were set up, but for those

PDP 11/03

I've been gathering bits and pieces from recent Ebay purchases and would like to see if anyone has a spare 11/03 or 11/23 qbus type box. I've got quite a few cards, and even a backplane block, but the prices on ebay are crazy, and I'd like to check here before doing anything rash. I suspect I

PDP 11/03

I'm looking for a cable or cable pinout to get the console of this 11/03 going. I figure to ask the simple question here rather than dig my self a hole trying to puzzle it out or guess the solution. http://jimsoldtoys.blogspot.com/2015/11/pdp-1103-system.html It has a M7940-YA DLV11 control

Re: PDP-11

On Wed, May 11, 2016 at 2:36 PM, Dave Wade wrote: > Folks, > > I have recently a PDP-11 which apparently came from a VAX console. It looks > to me like there are two CPU's in there, a console card, RX02 Controller, > Memory and Bus Terminator. I have done lots of searchi

Re: PDP-11

> From: Dave Wade > I have recently a PDP-11 which apparently came from a VAX console. If that's really where it came from, it's a QBUS 11/03. (And IIRC only the 780 had a PDP-11 console, although I'm not a VAX expert.) > It looks to me like there are two

Re: PDP-11

> On May 11, 2016, at 3:30 PM, Noel Chiappa wrote: > >> From: Dave Wade > >> I have recently a PDP-11 which apparently came from a VAX console. > > If that's really where it came from, it's a QBUS 11/03. (And IIRC only the > 780 had a PDP-11 consol

Re: PDP-11

empty. Also have loose grant card On 11 May 2016 20:46, "Paul Koning" wrote: > > > > On May 11, 2016, at 3:30 PM, Noel Chiappa wrote: > > > >> From: Dave Wade > > > >> I have recently a PDP-11 which apparently came from a VAX console. >

Re: PDP-11

at 3:30 PM, Noel Chiappa > wrote: > > > > > >> From: Dave Wade > > > > > >> I have recently a PDP-11 which apparently came from a VAX console. > > > > > > If that's really where it came from, it'

Re: PDP-11

On Wed, May 11, 2016 at 2:24 PM, Adrian Graham wrote: > On 11/05/2016 20:45, "Paul Koning" wrote: > > > > >> On May 11, 2016, at 3:30 PM, Noel Chiappa > wrote: > >> > >>> From: Dave Wade > >> > >>> I have recently a

Re: PDP-11

On 11/05/2016 20:45, "Paul Koning" wrote: > >> On May 11, 2016, at 3:30 PM, Noel Chiappa wrote: >> >>> From: Dave Wade >> >>> I have recently a PDP-11 which apparently came from a VAX console. >> >> If that's really where it

Re: PDP-11

On Wed, May 11, 2016 at 5:24 PM, Adrian Graham wrote: >> Some others had a PRO as their console. Don't remember which models >> specifically. > The 8{3|5}50s our biggest customer used had Pro380 VAX CONSOLES Not the 82xx/83xx, but the larger 85xx, 87xx and 88xx... Machines with a Nautilus bus, m

Re: PDP-11

On 11/05/2016 23:08, "Ethan Dicks" wrote: > On Wed, May 11, 2016 at 5:24 PM, Adrian Graham > wrote: >>> Some others had a PRO as their console. Don't remember which models >>> specifically. >> The 8{3|5}50s our biggest customer used had Pro380 VAX CONSOLES > > Not the 82xx/83xx, but the larger

Re: PDP-11

On 12/05/16 00:05, Adrian Graham wrote: My memory's getting skewed with age, clearly. I can remember RKG's (Royal Kingdom of Geordies) finest 2 engineers upgrading the 8350s to 8550s and the passage of time has me convinced it was 'only' a backplane swap. I was purely a code monkey back then. On

Re: PDP-11

> From: Dave Wade > Cards are > M7264 11/03 processor with 4-Kword MOS RAM > M7940 > M9400ye DLV11 Serial Line Unit (system cosole) REV11-E (240-ohm terminators for Q18) QBUS termination is a complex subject; when you have multiple backplane sections, connected by cables, e

RE: PDP-11

> > Also have loose grant card > > You mean an M9047? > Small card, looks like it fits deep in bus. Sorry didn't get number and machine is not accessible at present > > I would start with just the 11/03 CPU and the console card; hook it up to > something, and see if you can get it to t

Re: PDP-11

> From: Dave Wade > Small card, looks like it fits deep in bus. If it is a QBUS grant continuity card, it will have two looped-back pin pairs (the QBUS has two grant lines - DMA and interrupt) on the back-side, with a blank pin between them. (AM2-AN2 and AR2-AS2, to be exact.) > Any

Re: PDP-11

On 12/05/2016 00:17, "Antonio Carlini" wrote: > On 12/05/16 00:05, Adrian Graham wrote: >> >> My memory's getting skewed with age, clearly. I can remember RKG's (Royal >> Kingdom of Geordies) finest 2 engineers upgrading the 8350s to 8550s and the >> passage of time has me convinced it was 'only

RE: PDP-11

> QBUS termination is a complex subject; when you have multiple backplane > sections, connected by cables, each section has 'termination'. That's what this > REV11-E card is; it's also the QBUS 'out' to the card in the 780 CPU which the > console -11 uses to control the /780 CPU. Why it's in the mi

Re: PDP-11

> From: Dave Wade >> In theory, the M8044-EE should be an "MSV11-DE" (not "MSV11-EE", that >> would be an M8045-EE), but none of my documentation, including the >> M8044 prints, covers such a variant. > The back of the board says M8045 5013128DP1 32K 18bit MOS memory All M804

Re: PDP-11

I believe the boards were all designed as a M8045, which was the parity model, and the M8044 was on the same artwork, just missing a few bits to make it parity. On Fri, May 13, 2016 at 5:52 PM, Noel Chiappa wrote: > > From: Dave Wade > > >> In theory, the M8044-EE should be an "MSV11-DE"

Re: pdp 11?

The DL11-W is a UNIBUS serial line + real-time clock. - Josh On 6/26/16 10:11 PM, Adrian Stoness wrote: friend found this now opening channels to rescue it its an 11 of some sort not sure witch one https://scontent-iad3-1.xx.fbcdn.net/t31.0-8/13528577_10154158749830056_6453066395005995961_o.j

Re: pdp 11?

> From: Adrian Stoness > friend found this now opening channels to rescue it > its an 11 of some sort not sure witch one ??? Both URL's are the same picture - an envelope on the floor? Noel

Re: pdp 11?

woops here https://scontent-iad3-1.xx.fbcdn.net/t31.0-8/13528563_10154158749825056_5125938316429319662_o.jpg On Mon, Jun 27, 2016 at 7:24 AM, Noel Chiappa wrote: > > From: Adrian Stoness > > > friend found this now opening channels to rescue it > > its an 11 of some sort not sure wi

Re: pdp 11?

where is this?

Re: pdp 11?

> From: Adrian Stoness >> its an 11 of some sort not sure witch one Ah, OK. That's either an -11/04 or -11/34 in the top left corner, with either an RX01 or RX02 above it. (Not enought detail in the image to say.) The rest of it seems to all be some sort of custom medical or other special

AW: pdp 11?

Look at: https://www.flickr.com/photos/vincent-photography/ He signs his fotographs like https://scontent-iad3-1.xx.fbcdn.net/t31.0-8/13528563_10154158749825056_5125938316429319662_o.jpg -Original-Nachricht- Betreff: Re: pdp 11? Datum: 2016-06-27T14:52:35+0200 Von: "william d

Re: pdp 11?

Mothballed cement plant On Jun 27, 2016 7:52 AM, "william degnan" wrote: > where is this? >

PDP-11 prices

So that most recent PDP-11/20 (well, technically, a /15) on eBay went for $2200: http://www.ebay.com/itm/191933305000 which was a lot less than the other one _but_ this was only one drawer, only one ME11 memory, no H960, no documentation, no software, no KT11-B, etc, etc. It looks like the

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

> things > > worse, that CPU uses lots of PROMs. Lots and lots and lots and lots of > PROMs. > > > > For the data paths board (M7260), both major versions appear to contain > the > > same PROMs (going by the DEC part numbers), but the chip location (Exx) > > numbe

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

ts and lots of > PROMs. > > > > For the data paths board (M7260), both major versions appear to contain > the > > same PROMs (going by the DEC part numbers), but the chip location (Exx) > > numbers are all different. > > > > For th

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

ns each contain mostly the same PROMs, but apparently with slight differences between the sets of PROMs in each (as reflected in different DEC part numbers). For details see: http://gunkies.org/wiki/PDP-11/05#Control_PROMs to which I have just added all the gory details. As to getting the cont

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

ngs >>> worse, that CPU uses lots of PROMs. Lots and lots and lots and lots of >>> PROMs. >>> >>> For the data paths board (M7260), both major versions appear to contain the >>> same PROMs (going by the DEC part numbers), but the chip location (Exx) &

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

stly the same PROMs, but apparently with slight differences between the sets of PROMs in each (as reflected in different DEC part numbers). For details see:    http://gunkies.org/wiki/PDP-11/05#Control_PROMs to which I have just added all the gory details. As to getting the contents of all of them d

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

> From: Tom Uban > it has the early version M7261E Control Logic & Microprogram board and > the later version M7260 Data Paths board Ah, I'm glad someone found all that stuff I wrote up there useful. As always, I _think_ I got it all transcribed correctly, but do be on the lookout for

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

On 6/14/21 3:39 PM, Noel Chiappa via cctalk wrote: > > From: Tom Uban > > > it has the early version M7261E Control Logic & Microprogram board and > > the later version M7260 Data Paths board > > Ah, I'm glad someone found all that stuff I wrote up there useful. As always, > I _think_ I

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

On Tue, Jun 15, 2021 at 6:34 AM Tom Uban via cctalk wrote: > My KM11s are based on Tony Duell's schematic and if you look, switches S3 > and S4 are both driving outputs rather than simply switching them to ground, > so I don't think two boards at one time would work if these signals are simply >

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

While we are on the subject of pdp11/05's I am in the need of repair services for my M7261 KD11-B CPU board 1 (CONTROL LOGIC & MICROPROGRAMMED MODULE.) Bill On Tue, Jun 15, 2021, 9:59 AM Tony Duell via cctalk wrote: > On Tue, Jun 15, 2021 at 6:34 AM Tom Uban via cctalk > wrote: > > > My KM11s

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

On 6/15/21 8:58 AM, Tony Duell via cctalk wrote: > On Tue, Jun 15, 2021 at 6:34 AM Tom Uban via cctalk > wrote: > >> My KM11s are based on Tony Duell's schematic and if you look, switches S3 >> and S4 are both driving outputs rather than simply switching them to ground, >> so I don't think two boa

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

On Tue, Jun 15, 2021 at 4:47 PM Tom Uban wrote: > > On 6/15/21 8:58 AM, Tony Duell via cctalk wrote: > > On Tue, Jun 15, 2021 at 6:34 AM Tom Uban via cctalk > > wrote: > > > >> My KM11s are based on Tony Duell's schematic and if you look, switches S3 > >> and S4 are both driving outputs rather th

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

On 6/15/21 1:45 PM, Tony Duell wrote: > On Tue, Jun 15, 2021 at 4:47 PM Tom Uban wrote: >> On 6/15/21 8:58 AM, Tony Duell via cctalk wrote: >>> On Tue, Jun 15, 2021 at 6:34 AM Tom Uban via cctalk >>> wrote: >>> My KM11s are based on Tony Duell's schematic and if you look, switches S3 an

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

On Mon, Jun 14, 2021 at 10:34 PM Tom Uban via cctalk wrote: > On 6/14/21 3:39 PM, Noel Chiappa via cctalk wrote: > > > From: Tom Uban > > > > > it has the early version M7261E Control Logic & Microprogram board > and > > > the later version M7260 Data Paths board > > > > Ah, I'm glad

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

On 6/15/21 2:02 PM, Josh Dersch wrote: > > > On Mon, Jun 14, 2021 at 10:34 PM Tom Uban via cctalk > wrote: > > On 6/14/21 3:39 PM, Noel Chiappa via cctalk wrote: > >     > From: Tom Uban > > > >     > it has the early version M7261E Control Logic & Mic

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

On 6/15/21 12:16 PM, Tom Uban via cctalk wrote: On 6/15/21 2:02 PM, Josh Dersch wrote: Just to provide some real-world data, I used a pair of KM11's to debug my 11/05, see the picture here: http://yahozna.dyndns.org/scratch/1105-debug.jpg

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

Drawings_Feb73.pdf > > The GT40 drawings has the PROM listings and related, so I am hoping that they > match what is in the > two boards. My original PDP-11/05 print set that came from the BHP steelworks is titled just 'PDP-11/05 Engineering Drawings' and the drawings are fo

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

t;> http://www.bitsavers.org/pdf/dec/graphics/VT11/GT40_Graphic_Terminal_Engineering_Drawings_Feb73.pdf >> >> The GT40 drawings has the PROM listings and related, so I am hoping that >> they match what is in the >> two boards. > My original PDP-11/05 print set that cam

Re: PDP-11/05 (was: PDP-11/05 microcode dump?)

M7261E >>> schematic: >>> >>> http://www.bitsavers.org/pdf/dec/graphics/VT11/GT40_Graphic_Terminal_Engineering_Drawings_Feb73.pdf >>> >>> The GT40 drawings has the PROM listings and related, so I am hoping that >>> they match what is in the >>> two b

PDP-11/40 modified to be a PDP-11/23

The RICM just picked up a PDP-11/40 chassis that was modified to accept a PDP-11/23 board set. It also contains a custom board to interface the PDP-11/23 to the original PDP-11/40 front panel. It is quite an accomplishment to get the Q-Bus board set working in the Unibus chassis. -- Michael

Differences between the PDP-11/15 and PDP-11/20

A few months back you might recall the road trip I did to recover a Foxboro FOX-2, a rebadged PDP-11 that ran the furnace oxygenation plant at the BHP steel mill at Port Kembla here in Oz during the 1970s. I had thought the machine was an 11/20 with a custom FOX front panel that (apart from

Differences between the PDP-11/15 and PDP-11/20

> From: Paul Popelka > Thanks for posting that the KT-11B documentation is available. Sure. Was the Computer History Wiki thing of any use? > Does anyone know if schematics for it were included in the auction? > ... > If the schematics are available, are there plans to get on

Differences between the PDP-11/15 and PDP-11/20

> From: Paul Popelka > I was wondering how much delay the KT-11B introduces. That's a _very_ interesting question; AFAIK, the documentation doesn't say. If there's a cache miss, of course, there's one memory cycle delay to load it. If the cache hits, though, there's still added gate dela

Re: PDP-11/40 modified to be a PDP-11/23

I'm guessing the Qniverter. On Tue, Jun 21, 2016 at 9:37 PM, Josh Dersch wrote: > On 6/21/16 6:05 PM, Michael Thompson wrote: > >> The RICM just picked up a PDP-11/40 chassis that was modified to accept a >> PDP-11/23 board set. It also contains a custom board to interf

Re: PDP-11/40 modified to be a PDP-11/23

On Wed, Jun 22, 2016 at 1:05 PM, Michael Thompson wrote: > The RICM just picked up a PDP-11/40 chassis that was modified to accept a > PDP-11/23 board set. It also contains a custom board to interface the > PDP-11/23 to the original PDP-11/40 front panel. It is quite an > accomplis

Re: PDP-11/40 modified to be a PDP-11/23

On 6/21/16 6:05 PM, Michael Thompson wrote: The RICM just picked up a PDP-11/40 chassis that was modified to accept a PDP-11/23 board set. It also contains a custom board to interface the PDP-11/23 to the original PDP-11/40 front panel. It is quite an accomplishment to get the Q-Bus board set

Re: PDP-11/40 modified to be a PDP-11/23

On Tue, Jun 21, 2016 at 6:05 PM, Michael Thompson wrote: > The RICM just picked up a PDP-11/40 chassis that was modified to accept a > PDP-11/23 board set. It also contains a custom board to interface the > PDP-11/23 to the original PDP-11/40 front panel. It is quite an > accomplis

Re: PDP-11/40 modified to be a PDP-11/23

On Tue, Jun 21, 2016 at 9:05 PM, Michael Thompson < michael.99.thomp...@gmail.com> wrote: > The RICM just picked up a PDP-11/40 chassis that was modified to accept a > PDP-11/23 board set. It also contains a custom board to interface the > PDP-11/23 to the original PDP-11/40 fro

Re: PDP-11/40 modified to be a PDP-11/23

no Abel Qniverter, but I can't recall what DEC module was on the Unibus to drive the Qbus (the Qbus input paddle card was one of the ordinary ones used in a BA11N or similar). I never got the history, but presumably, some time in the late 1970s, Ohio State ordered a PDP-11/34 with IEEE-488 an

Re: PDP-11/40 modified to be a PDP-11/23

KPLANE", > so the operation is not so mysterious. I had never seen a hex-wide Q-bus > backplane before this. > > There are some pictures of the system and the Q-Bus to 11/40 front panel > interface here: http://www.ricomputermuseum.org/Home/equipment/dec-pdp-1140 > Maybe a

Re: PDP-11/40 modified to be a PDP-11/23

now, there is a 11/23 I could love! ---Ed# In a message dated 6/22/2016 9:44:20 P.M. US Mountain Standard Time, glen.sl...@gmail.com writes: BACKPLANE", > so the operation is not so mysterious. I had never seen a hex-wide Q-bus > backplane before this. > > There are some pictures of the s

Re: Differences between the PDP-11/15 and PDP-11/20

> From: Steven Malikoff > I'm wondering if there are any more differences apart from the lack of > the two high address switches? According to the -11/15-20 processor manual (pg. 2), the differences between the two are i) the -15 has only one hardware interrupt level, not four (the la

Re: Differences between the PDP-11/15 and PDP-11/20

> On Aug 3, 2016, at 8:57 AM, Noel Chiappa wrote: > ... > I'm not sure how the KT11-B works, but my _suspicion_ (going from the > pictures of that one that sold on eBay) is that it's not part of the CPU, but > a UNIBUS device, which maps part of the UNIBUS which the CPU _can_ see (i.e. > in the 0

Re: Differences between the PDP-11/15 and PDP-11/20

On Wed, Aug 03, 2016 at 10:18:07PM +1000, ste...@malikoff.com wrote: > A few months back you might recall the road trip I did I do, and I've been meaning to ask you what became of the PDP-9 that was in the same room. Thanks, Pontus.

Re: Differences between the PDP-11/15 and PDP-11/20

> From: Paul Koning > It would have to be a Unibus bridge type device, i.e., it terminates > the Unibus from the CPU, and at the other end originates a Unibus with > mapped addresses on it. Oh, right you are - I hadn't worked that out. (Probably because my head is still full of KT

Re: Differences between the PDP-11/15 and PDP-11/20

in the Wiki page (e.g. you apparently can't modify the CPU's priority in User mode), so if you're really interested in the thing, read the OD too. A couple of observations: First, it does not contain anything like SSR1 in the standard PDP-11 memory management, which records which regis

Re: Differences between the PDP-11/15 and PDP-11/20

Thanks for posting that the KT-11B documentation is available. Does anyone know if schematics for it were included in the auction? The flip chip board complement for it is in the posted document but nothing else. If the schematics are available, are there plans to get onto bitsavers? Paul Sent

Re: Differences between the PDP-11/15 and PDP-11/20

> From: Noel C. > Was the Computer History Wiki thing of any use? Yes. It answered a little of what I was wondering about. It mentioned that there is a cache of page table entries. I was wondering how much delay the KT-11B introduces. > > Does anyone know if schematics for it were included in

PDP-11/15 available

As some of you know, I've been waiting for a truckload of DEC items to come in from Canada for quite a while. It was turned back at the boarder because they changed their mind on the paperwork last month. Well, It should be here this week, and there is a PDP-11/15 I will be selling. If yo

FS: PDP-11/55

I have nothing to do with this...I just noticed it on alt.sys.pdp11 and figured that I'd pass it along. TTFN - Guy Hi all, I have a PDP-11/55 for sale (Ottawa, Ontario, Canada). Bids open until 2015 09 15, buyer to arrange shipping, I will have it wrapped and ready

FS: PDP-11/55

Hi all, I have a PDP-11/55 for sale (Ottawa, Ontario, Canada). Bids open until 2015 09 15, buyer to arrange shipping, I will have it wrapped and ready to go. Please visit: www.krten.com/~rk/museum/index.html For pictures, detailed inventory and contact info. Sealed bids via eamil

FS: PDP-11/55

Hi all, I have a PDP-11/55 for sale (Ottawa, Ontario, Canada). Bids open until 2015 09 15, buyer to arrange shipping, I will have it wrapped and ready to go. Please visit: www.krten.com/~rk/museum/index.html For pictures, detailed inventory and contact info. Sealed bids via eamil

pdp-11 assembly standards

OK, what was the standard (if there was one) number-base syntax for PDP-11 assembler? Despite all the PDP-11 assembly info on web sites, this seems to be a buried bit of info. One assembler doc uses a prefix of "&o", another specifies octal as default and prefix of zero for dec

PDP-11/34 rails?

Hi all -- I'm looking to rack up my PDP-11/34 so I can get it off my bench. I'd like to track down something similar to (if not exactly) the original rackmount rails (the ones that allow the chassis to pivot 90 degrees so you can deal with the backplane easily), but I'm no

Aquired PDP 11/23

This past week I managed to pick up a pdp 11/23. Excited to finally have a qbus system, it is quite small compared to my 11/34. Attached are some pictures showing what i picked up. I am in the process of stress testing the power supply before turning it on. The whole machine was quite dirty and

Multiprocessor Qbus PDP-11

There are indications in the KDJ11-B processor spec on bitsavers that the M8190 could be used in a multiprocessor configuration. For example, bit 10 of the Maintenance Register (17 777 750) is labeled "Multiprocessor Slave" and indicates that the bus arbitrator is disabled. There is also section 6.

PDP-11/05 Fault?

I've been restoring a PDP-11/05 recently and after replacing several faulty ICs I have it mostly working. I've run into a bit of a problem whilst running MAINDEC-11-D0NB (T14 TRAP TEST) though. The failing instruction sequence is: 7200:   MOV #6340,R0 7204:   MOV R0,(R0)+ 7206: 

PDP-11/70 Boards

Dear list, I'm currently restoring a PDP-11/70 system and need the following boards to complete the CPU: FP11-C slots: M8127 M8128 M8129 Cache slots: M8142 M8143 M8144 M8145 Any help finding these is appreciated. Thanks.

pdp-11/34 extravaganza

ty: 1 - Custom Built Tektronix Printer Terminal with Monitor (keyboard) - Quantity: 1 - Digital VT100 - Quatity: 2 - Digital VT105 Printer Terminal - Quantity: 2 - DEC Writer IV PDP 11/34 (edit by jay - I believe there is only one 11/34, not 4. I could be wrong.) - Quantity: 1 -

PDP-11 in russia?

Someone has contacted me about a pdp-11 that controls a "measuring machine dea epsilon". It appears that they want to replace the pdp-11 with a "ibm" (I'm guessing a pc), and then they would give the pdp-11 as a gift. That is all the info I have. Are there any

pdp-11 ethernet boot

The boot ROMs for uPDP-11 contain loaders for XH (ethernet) was there any kind of standard for the server? It tries to load from a MOP DL server and I have modified mopd from NetBSD to respond and load 2.11bsd a.out. So I have a solution, but was curious if there was some DEC standard.

RE: PDP-11 Memory

-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Bill Gunshannon via cctalk Sent: Wednesday, January 09, 2019 1:49 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: PDP-11 Memory ... M8067-LB M8067-LF M8067-LJ - Same problem. I can

Re: PDP-11 Memory

MV-4000 or http://web.frainresearch.org:8080/projects/pdp-11/cam.php for basic configuration help on the Camintonn Board. For the M8067-Lx try EK-MSV0P-UG-001_MSV11P_Aug81.pdf.  I believe the variants are different memory chip vendors. 980110014 is probably a National Semi NS23S    Jerry

Re: PDP-11 Memory

> From: Bill Gunshannon > I have a number of different memory modules. Mostly DEC but a couple > zthird party. Here's the problem. None of them are reflected in any of > the documentation I have been able to find so I can't configure them > away from their defaults! ... > A

RE: PDP-11 Memory

As far as I know about the 11/93 (or 11/94), all memory is on the CPU module. The 11/9[3|4] is sort-of an 11/8[3|4] with all (PMI) memory on the CPU module as the cache on the 8[3|4]. The 11/9[3|4] with 2 MB RAM can only be upgraded to 4 MB by adding RAM chips on the CPU module. However, all h

Re: PDP-11 Memory

On 1/9/19 2:28 PM, Henk Gooijen via cctalk wrote: > > As far as I know about the 11/93 (or 11/94), all memory is on the CPU module. > The 11/9[3|4] is sort-of an 11/8[3|4] with all (PMI) memory on the CPU module > as the cache on the 8[3|4]. > > The 11/9[3|4] with 2 MB RAM can only be upgraded t

Re: PDP-11 Memory

Well, it has been so long since I had to put together an entire system I forgot what fun it can be. With almost documentation I was able to configure 4 1meg memory modules and I tested them all in my 11/23+ box. KDJ11-B with 4 different (but similar) memory cards. "MAP" option of the KDJ11 show

Re: PDP-11 Memory

Most Probable cause is interrupt grant is broken. For most microspheres backplanes the first three slots are different than remaining. Phoned this in! On Jan 11, 2019, at 12:28 PM, Bill Gunshannon via cctalk wrote: Well, it has been so long since I had to put together an entire system I f

Re: PDP-11 Memory

> From: Allison Parent > Most Probable cause is interrupt grant is broken. The only -11 that complains if the grant chain is broken that I know of is the /34 (maybe the /04 too). I certainly have a QBUS chassis right next to my workstation here that i) has a bunch of empty slots, and ii)

Re: PDP-11 Memory

On 1/11/19 2:25 PM, Allison Parent via cctalk wrote: > Most Probable cause is interrupt grant is broken. For most microspheres > backplanes the first three slots are different than remaining. Yes, that's true. But the problem doesn't occur until the 5th slot. And a quick look at the C-D edges o

Re: PDP-11 Memory

On 1/11/19 2:32 PM, Noel Chiappa via cctalk wrote: > > From: Allison Parent > > > Most Probable cause is interrupt grant is broken. > > The only -11 that complains if the grant chain is broken that I know of is > the /34 (maybe the /04 too). I certainly have a QBUS chassis right next to

Re: PDP-11 Memory

On 01/11/2019 02:32 PM, Noel Chiappa via cctalk wrote: > > From: Allison Parent > > > Most Probable cause is interrupt grant is broken. > > The only -11 that complains if the grant chain is broken that I know of is > the /34 (maybe the /04 too). I certainly have a QBUS chassis right next to

Re: PDP-11 Memory

On 1/11/19 11:28 AM, Bill Gunshannon via cctalk wrote: Well, it has been so long since I had to put together an entire system I forgot what fun it can be. With almost documentation I was able to configure 4 1meg memory modules and I tested them all in my 11/23+ box. KDJ11-B with 4 different (b

Re: PDP-11 Memory

re cards that use or expect (or won't permit) certain signals on some pins which work fine in 18-bit backplanes but not 22-bit. There are things that will work in a BA11-S with H9276 backplane (which is what you had, if it really was a PDP-11/23plus) but not a BA23. You probably need to m

Re: PDP-11 Memory

On 01/11/2019 02:55 PM, Bill Gunshannon via cctalk wrote: > On 1/11/19 2:25 PM, Allison Parent via cctalk wrote: >> Most Probable cause is interrupt grant is broken. For most microspheres >> backplanes the first three slots are different than remaining. > Yes, that's true. But the problem doesn'

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