Re: Advice requested on proper disposal of Seagate ST3000DM001 disk drives

> From: Eric Smith > That's way too good for these

Re: The Ultimate Apollo Guidance Computer Talk

> From: Cory Heisterkamp > I can also highly recommend the book 'Digital Apollo' Yes, it's quite good. Two other good books about the AGC are: Eldon Hall, "Journey to the Moon" which is by a guy who was one of the managers on the project. The book is anything but a 'management

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

> From: Pierre Gebhardt > As I don't have core memory modules available, I thought of using MS11 > memory, which, according to my research, seems to be an option for > 11/40 systems. Err, which kind of MS11? There are lots of different ones: http://gunkies.org/wiki/MS11 and

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

> From: Henk Gooijen > As far as I know, the 11/40 uses only one H745. Depends on what kind of memory it has. If MF11-L, it has two H745's; if MM11-U, it has an H745 and an H754. (The harness has two different connectors for the 5th 'brick', so it can handle either kind. At least,

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

> From: Pierre Gebhardt > There are indeed some DEC power brick models on epay, but none > regarding the H745. Here is one: https://www.ebay.com/itm/270303423286 but it is _really_ pricey. I have dealt with them before, they put high prices on things; try offering them a

Re: Looking for two DEC H445 power bricks for PDP 11/40 project

> From: Pierre Gebhardt > two H745 bricks (delivering -15V) which are still missing. I'd be very > happy, if anybody could consider parting with one or two. Location is > in Germany. There should be some on eBait; mildly expensive, but if you get them from the US, the shipping is

Re: Further Lisp Machine Developments

> From: Daniel Seagraves > I spun up a blog for posting the ongoing status of things; Cool! Thanks! Very interesting... How many cards came with the CADR? My memory is dim, are there just memory and I/O cards, or was the disk controller on a separate card from other I/O? I wonder how

Re: I finally got to see a LMI Lambda in real life...

> From: Daniel Seagraves > Two of them in fact, and a CADR - In my garage, no less! Neat! Can you say anything about how they came to you? > and I have a working PDP-11 to debug the CADR with Was that part of the package, or did you already have it? Noel

Re: Oddball Terminals (Was: Re: VT100's)

> From: Al Kossow > I just put up some pictures of the vt02, 05 Those useable for the CHWiki (with credit, of course)? Oddly enough, I just did the article on the VT05 about a week ago! Noel

Re: LSSM - Large IBM haul

> From: Anders Nelson > Their latest comments on Facebook mention they're about halfway there. Yeah, but I was wanting to know how things had gone since that posting (although I haven't looked to see if there's any update). As of last night, they'd made significant progress past what was

Re: VT100's

> From: Paul Koning > inside are a whole pile of boards, all single-sided etch with many > hundreds of jumpers to compensate for not being two-sided. Not cheap, > presumably If memory serves, didn't the VT52 also have single-sided boards with a whole bunch of jumper wires?

Re: LSSM - Large IBM haul

> From: Anders Nelson > https://www.facebook.com/503408869821526/posts/1084448565050884/ This is an incredibly cool thing, and my hat is off to the LSSM for undertaking this. How's the fund-raising going? If money is still needed, I'll head off to Paypal and send a goodly chunk.

PDP-11/04 on eBay

For those who didn't catch it: https://www.ebay.com/itm/202415330983 I have bought from this seller before (very happy with the results), but am not otherwise affiliated. The -11/04 is a nice UNIBUS starter/test machine (my UNIBUS board debug machine is an -11/04). The CPU is a single (hex)

Re: DEC PDP 11 RK05 DEC custom (?) bootstrap board

> From: Paul Koning > the original ROM array bootstrap supports not just RK05 but also RF11, > RC11, and TC11 in just 16 words of code. Ah, the days of devices that just did what they were told without trying to be effing rocket scientists about it! (Yeah, yeah, I know _some_ of the

Re: DEC PDP 11 RK05 DEC custom (?) bootstrap board

> From: Bill Degnan > I am curious how I'd attempt to use one of these. Any thoughts? I'd start by dumping and disassembling. (If you need something to find out where in memory they are, I have a register discovery program that sweeps the I/O page and lists all locations that respond.

Re: Australian Computer Museum - HELP

> From: Pontus Pihlgren > I hope you can get the help you need. What ever happened about this? I figure the bulldozers must have arrived by now? Noel

Re: QED 933 (11/93 clone) and mystery SCSI board

> From: Glen Slick > A few people bought QED-993 boards from eBay in the last few years. > ... They are set up to use the standard 11/93 console panel, although > only 4 async ports are implemented, not 8. Is there any documentation anywhere? Bitsavers had only a thing on the

Re: Single-height Qbus grant continuity PCB

> From: Tony Duell > I have here a little square board (the same size as the older Unibus > grant continuity card) with just 2 pairs of pins linked. ... Has anyone > come across that one before? No, that's a new one on me. I have seen off-brand single-height QBUS grant jumpers,

Re: PC04 cables

> can I appeal to anyone who has, or can point me at, documentation for > the connection of the PC04 to _other_ PDP-8 models please lend a hand - > _especially_ if you have paper documentation which is not available > online? The other thing I'm looking for is anything about the

Re: PC04 cables

> From: Al Kossow > is it roytron/Roytron500_1966.pdf ? That sure looks like it! The illustration on pg 5-16 of the DEC PC054/PC05 manual looks just like the thing illustated on the cover of that. I wonder why it didn't turn up in the Web searches? Probably because this doesn't include

Re: Strange third party board in PDP-11/45

> As to what _else_ it is doing, and why it has the cable to the main > card... I think that it must intercept MSYN from the processor and only > let it pass if there's no hit in the cache. > (To explain why it would need to do that... normally with the MS11, > there's a static

Re: DEC power connectors (UNIBUS PDP-11s, mostly)

> From: Ethan Dicks > I just saw that this specific part had a min order. They have a min $10 order on _every_ part, and also a min of $25 on the total order. Noel

Re: DEC power connectors (UNIBUS PDP-11s, mostly)

> From: Fritz Mueller > If these are what you are talking about, I ordered up a bunch a couple > years ago when I rebuilt the power harness for my 11/45, and can attest > they are the right thing: Yeah, those are the ones. Note that ConnectorPeople has a relatively large minimum

Re: DEC power connectors (UNIBUS PDP-11s, mostly)

> From: Mattis Lind > Unfortunately the mate-n-lok which has 8 position and is used for > current loop connectors and H74x plug regulator does not seems to be > available anymore. But it would be nice to be corrected here. According to one dealer Web-site, what I think are those

Re: DEC power connectors (UNIBUS PDP-11s, mostly)

> From: Bill Degnan > is this info on or will be on your wiki? Well, it's not 'mine', but yes, I will be posting it when I find time. Noel

DEC power connectors (UNIBUS PDP-11s, mostly)

So, it turns out the power connectors (plastic female shell with metal male pins, etc) widely used in UNIBUS PDP-11's (e.g. to provide power to backplanes, etc) are still available, if anyone else wants any. (No doubt some of you already knew this; this is for those, like me, who didn't! :-) The

Re: Strange third party board in PDP-11/45

> From: Mattis Lind > I will take a picture of the boards in more detail so we can figure out > what they are doing later on. Thanks, that would be really useful. > My understanding is that slot 1AB and slot 26 AB is tied to each > other. So if there would be no expansion

Re: Strange third party board in PDP-11/45

> From: Mattis Lind > Here is how it is connected: Thanks for that - very informative! > The sandwiched dual boards are sitting in 27 / 26 AB. The board in 27AB > was empty (quick glance), while the board in 26AB has a few TTL chips > on it. Slot 26AB is the Unibus A slot,

DEC uNotes

> #30 "PMI on KDJ11-B and MSV11-J" So it turns out there are _two_ uNote sets, with overlapping numbers! (A fact about which I was previously unaware!) I have two PDF files of the collections; micronoteReprints.pdf (the first set), and oemMicronotes.pdf (the second). Note! There's an index

Re: PDP-11/84 Qbus slots for memory

> From: Charles Dickman > an 11/84 with the UNIBUS adapter and PMI memory does not have a Qbus. > ... the KDJ11-B (M8190) bus protocols change when a KTJ11 (UNIBUS > adapter) is present and so what would be expected to be Qbus isn't. Ah, excellent point. Looking at the

Re: Strange third party board in PDP-11/45

> We're actually pretty well off, there; we have: > - MS11 Maintenance Manual (DEC-11-HMSAA-D-D) > - MS11 MOS Memory Troubleshooting Guide (DEC-11-HMSTS-A-D) > - MS11-B Engineering Drawings There's also a little bit about the MS11-C (not covered in the documents above) in

Re: Strange third party board in PDP-11/45

> From: Paul Birkel > Unfortunately there's not much documentation for the MS11. ??? We're actually pretty well off, there; we have: - MS11 Maintenance Manual (DEC-11-HMSAA-D-D) - MS11 MOS Memory Troubleshooting Guide (DEC-11-HMSTS-A-D) - MS11-B Engineering Drawings About all we're

Re: PDP-11/84 Qbus slots for memory

> From: Mark Matlock > With the 11/83 the position of the memory board ... above the CPU uses > PMI Yes, through the C-D interconnect; described in detail here: http://gunkies.org/wiki/CD_interconnect#Use_by_PMI The 'above' is because the CD interconnect is not a true bus, it

Re: Strange third party board in PDP-11/45

> From: Paul Birkel > ABLE Computer Technology. Their first product was PN 10001 ... the > A.C.T. Univerter This board is not shown in any of the Able brochures we have: http://bitsavers.trailing-edge.com/pdf/able/brochures/ However, Able info is _very_ thin on the ground, now...

Re: GoTEK SFR1M44-U100...

> From: Liam Proven > one of the questions was about "the early days of the old-time > internet, if you're old and you've been online forever." > It was about Myspace. Yikes. Send them this: http://www.chiappa.net/~jnc/tech/sflovers/ Noel

MSV11-J repairs

Hi, all, if anyone has any broken MSV11-J boards, I recently fixed one for a list member, and if anyone else has a broken one they'd like me to take a gander at, please let me know. (No charge!) I won't be able to fix _all_ problems (we don't have prints, or replacements for the custom gate

Re: An historical nit about FDDs

> From: Jon Elson > I THINK the 370/145 used the same drive. The "IBM's 360 and Early 370 Systems" book doesn't say so explicitly (it just says Minnow - the one with the solenoids - was a"incorporated in .. the System/370 processors", pg. 517), but given that the follow-on drive

CHWiki issues fixed

The two main issues with the CHWiki (non-logged in users not seeing the most recent versions of pages, and image uploads not working) have been dealt with. Noel

Re: Another DCJ11 oddity

> From: Jerry Weiss > See http://simh.trailing-edge.com/semi/j11.html for information on the > design of the J11. Thanks for that pointer; I don't think I've ever seen that - quite interesting. Alas, it didn't have the cache info - but now that I've though about it overnight, I'm

KDJ11 misfeature

So, it appears that the KDJ11 (definitely the -A, and probably all of them) cannot execute code from the PARs - one gets a NXM trap. (Definitely the kernel I PARs, I haven't checked all 6 sets, but I can't see why they others would be any different.) Has anyone else run into this, so I can be sure

Re: Odd MSV11-J bug (Was: MSV11-J engineering info)

> it is not board-dependent - two different boards give incorrect read > data for the same write values!! ... I wonder if the board is storing > wrong values a _lot_, and the ECC is normally catching them? Anyone have any idea what might be going on here? I ask because I'm fixing to

Re: Odd MSV11-J bug (Was: MSV11-J engineering info)

> none of the other values used in that seemed to have a problem; but of > course the program didn't include all 2^16 patterns. I suppose I should > whip up a small program to try other values, and see if anything else > does this... And it does! Quite a few values come back

Odd MSV11-J bug (Was: MSV11-J engineering info)

> I first have to tweak my 'scope loop program, to turn on memory mapping So while doing that I just discovered what I _think_ (maybe I'm just not being smart enough to see that it's somehow 'doing the right thing') is the wierdest hardware bug I've ever seen. Plug in an MSV11-J, disable ECC

Re: MSV11-J engineering info

> From: Glen Slick > What signal were you probing on the M8186 KDF11-A board? BDOUT; I'm triggering on that, and without any prints it wouldn't be easy to find on the MSV11-J. Picking it up off the KDF11-A was the easy way to go. > If you run the XXDP VMJAB0 diagnostic and there are

Re: MSV11-J engineering info

> From: Tor Arntsen > So, here's how to see the updated page while not logged in: Thanks for posting the 'fix'; the problem, and that workaround, are described on the 'News' sidebar on the Main Page, but of course people going straight to a URL won't see that - and since I'm always

Re: MSV11-J engineering info

>> I'll add the info to the MSV11-J page on the CHWiki, once I have it. > Alas, it's down at the moment ... but once it's back, I'll get them > right up. It's back, and I've added the chip info for the low 1MB bank: http://gunkies.org/wiki/MSV11-J_QBUS_memory#Technical_information

Re: MSV11-J engineering info

> I'm going to need this info real soon ... so I'll probably start on > this later today if nobody has the info. > ... > write a two-instruction loop .. which writes a word with only a single > '1' bit, hook up a 'scope ... to a DRAM input, and walk the bit through > ...

Re: MSV11-J engineering info

> From: Glen Slick > There are 88 41256 256Kx1 DRAMs on a 2MB MSV11-J. Each 512KB bank has > 22 256Kx1 DRAMs organized as 16 data bits plus 6 ECC bits. Umm, I think the internal organization is paired banks (one for even word addresses, one for odd); the manual talks about doing

MSV11-J engineering info

Hi, I'm looking for engineering info on the MSV11-J. I was unable to find any prints online, or even a technical manual. (I have the User Manual, but it doesn't have much detail.) The main issue I'm after is working out which bits go into which chips. I have some other QBUS memory boards with

Re: DEC FPJ11-AA

> From: Pete Turnbull > Bill would want the -JD (2MB) version (the -JE version is 4MB so too > big). Err, the -JD is 1MB, and the -JE is 2MB (see e.g. EK-MSV1J-UG-001, pg. 1-3). Noel

Re: DEC FPJ11-AA

> From: Bill Gunshannon > Anybody have any PMI memory modules they might let go for less than my > first born male child? The DEC PMI memories are the MSV11-J and (I think) the MSV11-R. The latter is rare, but the -J's can be found. VARx sold me some -JE's a couple of years back for

Re: DEC FPJ11-AA

> From: Paul Birkel > Same thing in this case. The CPU looks to see a PMI signal that is generated by the KTJ11 - no signal -> 11/83. My impression is that except for the speed of the J11 (and the crystal), and whether or not it came with the FPJ11, all four of the M8190 board variants

Re: Thicknet/10base5 Test Segment: The Cable is In!

> From: Eric Smith > If you _must_ run a long -232 cable 'Don't!' That's what -422 is for. :-) Noel

Re: Thicknet/10base5 Test Segment: The Cable is In!

> the AMP coring tool ... doesn't screw in though ... I don't know if this > is consistent with the original 3 mbit Ethernet, as I've never worked > with that. I was speaking of the gear used on the 3 Mbit. I don't recall the 10 Mbit stuff at all I have this vague memory that the

Re: Thicknet/10base5 Test Segment: The Cable is In!

> From: Paul Koning > I believe the original concept was just a probe that would poke through > the cable to contact the center connector. The drill came because the > cable was too tough to penetrate without it. No, the original 3 Mbit Ethernet also used a 'drill' (actually, a

eBay: HP 21MX E-Series Minicomputer 2109B

Figure you HP fans will already have seen this, but in case not: https://www.ebay.com/itm/332695779697 Noel

Re: CDC 6600 display character generation

> From: Toby Thain > It's suggested there (without any proof though) that the CDC used a > Fourier process > ... > I'd be very interested to know what you find out about the circuitry. Someone very kindly pointed me at:

CDC 6600 display character generation

Hi, I'm hoping someone here knows the low-level nitty-gritty on how the characters on the CDC 6600 console CRTs were generated. Thornton, "Design of a Computer", says "Control of the beam .. is provided by electrostatic deflection ... electronically converting from the symbol .. to deflection

Re: Weird Lear-Siegler ADM-3A board

> Jon Elson > How/where should I submit this? This is now available through here: http://gunkies.org/wiki/Term-Mite_ST_Smart_Terminal I put in a little infrastructure around it (articles on the Term-Mite, NS405, etc), using info I dug up online. Noel

Re: RC25 (was Re: Modifying microcode)

> From: Ethan Dicks > Mostly, what I need is affordable ($250 or less) Unibus storage with > modern media There's this: http://www.retrocmp.com/projects/unibone Not quite there yet, but getting there. Noel

Re: old DEC stuff

> From: Dominique Carlier > I just regret this incredible rise in prices for collector machines > that, not so long ago, were languishing in wet sheds Hey, look at the bright side: as a result, they are much less likely to be simply recycled as scrap. I took great pleasure in

Re: Modifying microcode

> From: Henk Gooijen > My findings so far : > www.pdp-11.nl/pdp11-35/repair/repair35page.html > Comments are very welcome! I got a: You don't have permission to access to this document on this server. Apache Server at pdp-11.nl error message? > I vaguely remember

Re: Modifying microcode

> From: Kyle Owen > I do have an 11/45, though... so with this modification, I suppose one > could have some fun: That's for the -11/40 - very different machine, one couldn't use the same technique on the /45; the /40 is prepared to accept additional ucode on additional CPU boards,

MM11-F manual/drawings

So I have discovered that the manual and prints for the MM11-F core memory are not online; it turns out I have a manual/prints set, and at some point will get them scanned and over to Al. My question is: is there anyone who has an immediate need for these things? If so, I will make the scan

Re: Weird Lear-Siegler ADM-3A board

> From: Eric Smith > The NS455 has firmware in masked ROM ... The NS405 has the masked ROM > disabled Ah, thanks muchly! Do you know of _any_ documentation extant for the 455? I couldn't find anything.. > I've been searching for the NS405 manual (not the datasheet) for a very

Re: Weird Lear-Siegler ADM-3A board

> From: Jon Elson > Steve Ciarcia ... made a board using the NS405 called the Term-Mite. I decided I'd do an article about the Term-Mite for the CHWiki; I found Ciarcia's long article about the Term-Mite (in his book, which Google books has); it talks throughout the article about the

Re: Original CAD code in the wild?

>From: Al Kossow > NASTRAN is available That's a finite element modeling code, isn't it? (I guess it all depends on what the OP meant by 'CAD'...) Noel

Re: Original CAD code in the wild?

> From: Randy Dawson > For a while I have collected bits of legacy CAD > ... > My question is, did any of the source code for these systems > .. ever make it out Well, not quite what you're asking about, I think (it sounds like you're interested in MechE CAD, not EE, even

Re: MS11 M8110/M8120 controller card differences

> From: Bob Smith > 8110 for MOS memory, and 8120 for bipolar memory is what field guyde > list says. Well, the early bipolar MS11-C (1K boards) used the M8110 during early production (see e.g. DEC-11-HMSAA-D-D, pg. 1-1), and apparently then switched over to the M8120. I've only seen

MS11 M8110/M8120 controller card differences

So I notice that M8120 controller card for the MS11 seems to share its etch with the earlier M8110 variant (the M8120 says "M8110" in the etch :-); so the differences must be component/configuration/ECO. Does anyone happen to know what the differences between the two are? Thanks! Noel

Re: Next 'stack' of computers to go, IBM p7's - not classics this time

> From: Mark Linimon > Would love to if you can change your mind on shipping? https://www.pakmail.com/ Like I said, they will come pick things up, as they sit - perfect for Pete's situation. And from my experience, not _always_ cheap, but _usually_ pretty good (e.g. a large PDP-11 in a

Re: ISO: DECtape controller

> From: Josh Dersch > the TU56 lacks the G888 flip-chips necessary to work with the TD8E; I > know these parts are in short supply, but in the unlikely event that > anyone has (a) a set of 5 G888 boards, I have this memory that someone in Scandanavia is well along with the

Anyone need KB11-B FMPS?

So I've just realized that the KB11-B (the earlier -11/70 CPU, the KB11-C being the later) FMPS is not online; I couldn't find them (but then my Google-fu is notoriously weak, q.v. the Motorola 4015 - thanks all, BTW), but Manx also says: http://manx-docs.org/details.php/1,9214 they aren't

Looking for info on Motorola 4015 chip

Hey, all, the RK11-D contoller for the PDP-11 uses Motorola 4015 MSI chips on one of the boards (M7254), but I can't find out anything about them. Google didn't turn anything up, and the appendix in the RK11-D Maintenance Manual that has info about 'all' the MSI chips used in the RK11-D doesn't

Re: Next 'stack' of computers to go, IBM p7's - not classics this time

> From: Pete Lancashire > Pak Mail is not cheap Actually, since they buy 'in bulk' from carriers, they are surprisingly reasonable; their quote to ship an H960 rack from Arizona to me was less than I was quoted by some carriers. Noel

Re: Next 'stack' of computers to go, IBM p7's - not classics this time

> From: Yvan Janssens > ... > I'm located at the other side of the planet. > Would PakMail work for that as well? Pakmail can _send_ to most countries (they can only do _pickups_ in the US and Canada, that I know of), but of course sending a large object a long way

Re: Next 'stack' of computers to go, IBM p7's - not classics this time

> From: Pete Lancashire > NO PACKING OR SHIPPING, must be local pickup. Just a reminded to everyone; most PakMail franchises are prepared to go somewhere off-site, pick items up where they sit, and then pack them; I've used this service several times for 'pick up only' items.

Re: Is This A Shill?

> From: Ali > There is a guy with a listing with missing parts which he is > advertising as working. It has been listed for over two years now ... > I offered to buy a part off of it for ~half of what he wanted > for everything and he replied that "the value was in keeping it

Re: Is This A Shill?

> From: Alan Perry > They went unsold again and I waited for the next auction run. I offered > the split-the-difference price again and they countered even higher. I > got the message and have stopped bidding. That was a couple months ago > and they still have sold any of

Re: eBay search fail

> From: js > I've seen similar behavior before, and other search problems. At one > point in time, eBay's search engine worked just fine. Then, a number of > years ago, they revised their - supposedly making it 'smarter' - and > ever since then, it hasn't worked as well

Re: eBay search fail

> From: js > To take a suggestion from your playbook, I'd try asking eBay - 'I'm > getting incorrect search results. Why?' Yeah, that would be something to try, but I was wary of stirring up trouble - eBay might decide to void the sale, etc. Maybe I should. My message to this list

Re: Is This A Shill?

> From: Rob Jarratt > I got this: > ... > For security, please keep all communication through the eBay message > system. Well, that bit sounds positive. And the feedback sounds good, but 56 items is a bit low - I've heard of scams where people do a number of small items to

Re: eBay search fail

Come on people, please i) try doing some actual research to see if theories hold water, don't just quickly post, and ii) read prior posts thoroughly. Searching for "pdp-11" (where the "'s are to indicate what's in the search box, and are _not_ typed into the search box) turns up a host of items -

RE: eBay search fail

> From: W2HX > I filter on category "Computers/tablets & Networking." It might not have > shown up in your search if you searching in "Vintage Computing" > category. Oh, I forgot to mention: I always search in 'All Categories' precisely to avoid misfiled entries (like this one).

Re: 8085 Dissasembly?

> From: Charles Anthony > discovered that changing the executable would change the behavior -- a > heisenbug. Ooh, love that neologism. Noel

Re: 8085 Dissasembly?

> From: Eric Smith > But then, some of us might be masochists. I think pretty much by definition if you're into vintage computers, you have to be a masochist... :-) Noel

Re: LCM 8/e System Photo makes ZDNet

> From: Paul Birkel > the blinky-lights controller panel top-dead-center :->. Yeah, that's a TC08. I actually have one of those inlays, it's the only original inlay I have. It was the model for the large run of blank inlays (black backing with the holes on the back, but nothing on the

Re: To be scrapped in as little as 2 months

> From: Ed Sharpe > wish this was closer! Two words: "ROAD TRIP!!!" :-) (I did Virginia<->Wisconsin to save an -11/84... That was a hike!) Noel

RL01/RL02 emulator needed -- (was Many thanks to Glen's Vintage Computer Info)

> From: Alan Frisbie > I need a controller that emulates the DEC RLV11/RLV12 and RL01/RL02 > drives. From my Google searching, I see a couple that use SD or similar > solid state devices. Err, which RLV11/RLV12 emulators are you seeing? I know of several RL02 emulators - Reinhard

Re: eBay: Anyone need a DLV11-J?

> From: Bill Gunshannon > Caution!! The DSD board has some broken chips and bent pins and all of > them look like they spent time in muddy water. Thanks for catching that. I looked at it, saw that it was a DLV11-J, which I didn't need, and so didn't look any harder. Noel

eBay: Anyone need a DLV11-J?

This is listed under a useless title: https://www.ebay.com/itm/292503681011 But it's (currently) cheap (don't all bid against each other ;-). Noel

Re: RL02 Question

> From: Aaron Jackson > I have tried three controllers, two r/w modules and two servo > controllers. I'm beginning to think the drive is fine and there is a > problem with the RLV21 controller. Err, think you mean RLV12 QBUS controller board, right? Anyway, you've already tried

Re: break on pdp11 serial ports

> From: Sytse van Slooten > digging through the documentation of KL-11 and DL-11 I did find > references to generating a break (bit 0 in the XCSR). But not on how it > would be received. ... How did a DL-11 like interface signal the > reception of a break? As JohnW says,

Re: Looking for opinions...

> From: Liam Proven > And yet, 3 generations later Can we please keep _all_ politics off the list? It didn't go so well last time. Noel

Re: R.I.P. Robert T. "Doc" Suding

> From: Al Kossow > The only place I ever saw an Apple I when it was for sale. Don't you wish you'd bought one - and kept it? :-) Noel

Re: PDP-11 DIV instruction lossage

> I'll have to redo my kludgy fix to gmtime() ... I guess I'll have to fix > it for real, instead of my kludgy fix (which extended it to work for > 16-bit results). :-) > ... > And on the -11/23: > Note that the returned 'quotient' is simply the high part of the dividend.

Re: PDP8/e programmers consoles

> From: Allison >> What about warm white LEDs, though? ... maybe they are available in >> bulb replacement form? > I used a supply of dead bulbs to make mine. a little heat and the glass > goes, a resistor and a 3mm led and good to go. Urr, I'm not up to making them! I was

PDP-11 DIV instruction lossage

So, I have discovered, to my astonishment, that the double-word version of the DIV instruction on the PDP-11 won't do a divide if the result won't fit into 15 bits. OK, I can understand it bitching if the quotient wouldn't fit into 16 bits - but what's the problem with returning an unsigned

Re: PDP8/e programmers consoles

> From: Allison > you have to pull the panel apart to replace them, gets tiring. Modern > yellow LEDs are nice and bright, and don't burn out. > Less digging in the box is a good thing as over time fumble errors can > hurt it. Agree about replacing lamps - we switched to LEDs

Re: DEC bus edge connectors

> From: Charles Dickman > Does anyone have DEC bus edge connectors they are willing to sell? > I would like to do some OMNIBUS interface prototyping and I need a way > to connect to the bus back-plane. Have you looked through Douglas Electronics' offerings? They have a lot of

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