Re: cctalk Digest, Vol 89, Issue 21

On Tue, Feb 22, 2022 at 3:29 PM Rod Smallwood via cctalk < cctalk@classiccmp.org> wrote: > > On 22/02/2022 23:16, Glen Slick via cctalk wrote: > > On Tue, Feb 22, 2022 at 2:20 PM Rod Smallwood via cctalk > > wrote: > >> I'm sure that will work. Unfortunatly dd is a linux command. > >> > >> I

Re: VAX9000 unearthed

On Fri, Feb 18, 2022 at 6:55 AM Paul Koning via cctalk < cctalk@classiccmp.org> wrote: > > > > > Speaking of vector processors: there's a very obscure DEC processor, the > DEC MPP. I remember seeing the processor architecture document when it was > being designed, not sure why. It's a very-RISC

Re: HP 2100S Power Supply Disassembly Tips

have a ton of stuff to cram into this supply and not a lot of space to put it in. - Josh On Mon, Feb 14, 2022 at 3:27 AM wrote: > Josh: Did you figure out a safe PS disassembly procedure? If so, what > and how did it go? > > -Original Message- > From: cctalk On Behalf

HP 2100S Power Supply Disassembly Tips

Hey all -- I've had this HP 2100S mini sitting on the bench for a bit, waiting, and I wanted to go through the power supply and test/reform the capacitors this past weekend. The processor service docs cover getting the supply out (which is slightly cumbersome) and I have that step done. But

Re: VAX 780 on eBay

On Sun, Jan 9, 2022 at 2:56 AM Noel Chiappa via cctalk < cctalk@classiccmp.org> wrote: > > This: > > https://www.ebay.com/itm/275084268137 > > ... > > Anyway I fully expect it to go ... for a _lot_ more than the opening > price. > > Much to my surprise, it didn't sell at all

Re: VAX 780 on eBay

On Sat, Jan 1, 2022 at 12:47 PM Guy Dunphy via cctalk wrote: > At 07:50 PM 1/01/2022 +, you wrote: > >> > >True. But if you're trying to get > $5000 for something, it doesn't seem > unreasonable to suggest that investing a bit in getting an extension cord > run to the location of the

Re: VAX 780 on eBay

On Sat, Jan 1, 2022 at 11:55 AM W2HX via cctalk wrote: > > > True. But if you're trying to get > $5000 for something, it doesn't seem > unreasonable to suggest that investing a bit in getting an extension cord > run to the location of the machine would be a good idea. The absence of > that

ISO: DEC PDP-8 Data Multiplexer (DM01, etc.)

Hey all -- Got the TC01 working the other night, after a couple weeks of debugging (*). I'd like to be able to have both it and the RF08 that I'm working on connected to the 8/I and running at the same time, so I'm looking for a DM01 Data Multiplexer. If anyone has any leads, do let me know.

Re: Source for DEC TC01 (and similar) bulbs?

On Mon, Dec 6, 2021 at 7:39 AM Michael Thompson < michael.99.thomp...@gmail.com> wrote: > > > On Sun, Dec 5, 2021 at 11:46 PM Josh Dersch wrote: > >> I swapped boards around in the datapath for these bits on the TC01 side >> last night and the problem doesn't move. On a whim I put my thumb on

Re: Source for DEC TC01 (and similar) bulbs?

On Sun, Dec 5, 2021 at 4:39 PM Michael Thompson via cctalk < cctalk@classiccmp.org> wrote: > > > > > > From: Josh Dersch > > Subject: Source for DEC TC01 (and similar) bulbs? > > > > The Search Scope loop diagnostic shows block numbers going by in both > > directions so a lot of the drive and

Re: RK11-C indicator panel inlays?

On Sun, Dec 5, 2021 at 12:24 PM Ethan Dicks via cctalk < cctalk@classiccmp.org> wrote: > On Sun, Dec 5, 2021 at 2:12 PM Noel Chiappa via cctalk > wrote: > > > Anyway, if anyone is interested, the next step would be to find out who > all > > wants an RK11-C inlay, and work out _exactly_ what

Re: Women of Computing

ctalk On Behalf Of Liam Proven via > cctalk > Sent: 05 December 2021 15:17 > To: Doc Shipley ; General Discussion: On-Topic and > Off-Topic Posts > Subject: Re: Women of Computing > > On Sun, 5 Dec 2021 at 16:09, Doc Shipley via cctalk > wrote: > > > > On 12

Source for DEC TC01 (and similar) bulbs?

Anyone sitting on a pile of these or know where to find some? These were originally Dialco 507-3917 or Drake 11-507 based on what was installed in mine. 24V, 40mA, white. A total of 23 bulbs were dead on my TC01's panel. I've installed a pile of electrically/physically compatible bulbs that I

Re: Women of Computing

On Sat, Dec 4, 2021 at 10:20 AM Chris Long via cctalk wrote: > Great.not. > > Why do we need woke Lego? > OK, Boomer. - Josh > -Original Message- > From: cctalk On Behalf Of Zane Healy via > cctalk > Sent: 03 December 2021 17:35 > To: General Discussion: On-Topic and Off-Topic

Re: Unrecognized DEC Power Supply in PDP-11/44 Configuration

On Thu, Dec 2, 2021 at 6:29 AM pbirkel--- via cctalk wrote: > Does anyone recognize the (presumably) DEC power supply on the front half > of > the rack-bottom in the 11/44 listing at: > > > > https://www.ebay.com/itm/363640137050 > > > > Blurry photo, but it looks like there are a 4x3, a 3x3,

Re: Looking for tips debugging DEC TC01 controller

On Tue, Nov 30, 2021 at 1:57 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > > > On Nov 23, 2021, at 3:17 PM, Josh Dersch via cctalk < > cctalk@classiccmp.org> wrote: > > I picked up a TC01 in trade (for a TC08) a couple of weeks back and this >

Re: PDP-11/70 Boards

On Mon, Nov 29, 2021 at 1:06 PM Ethan Dicks via cctalk < cctalk@classiccmp.org> wrote: > On Mon, Nov 29, 2021 at 3:19 PM Henk Gooijen via cctalk > wrote: > > I think the FP11 boards are not essential for the 11/70 > > They only add hardware FP support. > > Not essential for many uses, but I'm

Re: Micro Technology Board Info

On Sat, Nov 27, 2021 at 2:39 PM Josh Dersch wrote: > On Sat, Nov 27, 2021 at 12:53 PM Jerry Wright via cctalk < > cctalk@classiccmp.org> wrote: > >> Have this board here, but can't find any Info on it. >> Says Neptune board on the silkscreen, tag say model MSD138 T devDates are >> about 1990 to

Re: Micro Technology Board Info

On Sat, Nov 27, 2021 at 12:53 PM Jerry Wright via cctalk < cctalk@classiccmp.org> wrote: > Have this board here, but can't find any Info on it. > Says Neptune board on the silkscreen, tag say model MSD138 T devDates are > about 1990 to 1992. >

Looking for tips debugging DEC TC01 controller

Hey all -- I picked up a TC01 in trade (for a TC08) a couple of weeks back and this past weekend I got it hooked up and powered up with my PDP-8/I + TU55 transport. I've been debugging it and have solved a couple of issues but the current one has me stumped and I'm looking for advice, hoping I

For Sale, Seattle area: Data General MV/7800 + drives, docs

Hi all -- I'm doing a bit of cleanup to free up some space and I'd like to try to find a new home for my MV/7800. It's a really cool system that I just haven't had time to spend a lot of time with, and unfortunately it seems unlikely I will anytime soon. The power supply in the CPU has been

Re: ISO: GE Terminet 300 knowledge

On Sat, Oct 30, 2021 at 11:25 PM Tony Duell wrote: > On Sun, Oct 31, 2021 at 6:15 AM Josh Dersch via cctalk > wrote: > > > > Hey all -- > > > > I picked up a GE Terminet 300 which appears to be mostly functional, but > is > > in need of alignment -

ISO: GE Terminet 300 knowledge

Hey all -- I picked up a GE Terminet 300 which appears to be mostly functional, but is in need of alignment -- it's printing fairly smudged garbage with a few recognizable characters intermixed. Character positioning (horizontal) seems to be fairly irregular, for the characters that print

Re: Looking for info on memory

On Sat, Oct 23, 2021 at 10:30 AM Josh Dersch wrote: > > > On Sat, Oct 23, 2021 at 10:12 AM Nigel Johnson Ham via cctalk < > cctalk@classiccmp.org> wrote: > >> It is not possible to get ODT running without bank 0 memory. All I get >> is output of 173000 and the no ability to input. >> > > How is

Re: Looking for info on memory

On Sat, Oct 23, 2021 at 10:12 AM Nigel Johnson Ham via cctalk < cctalk@classiccmp.org> wrote: > It is not possible to get ODT running without bank 0 memory. All I get > is output of 173000 and the no ability to input. > How is your CPU board configured? Based on the above, it sounds like it's

Re: ISO M100, M102, M633 flip chips for DEC TC08N controller

On Fri, Oct 1, 2021 at 1:09 AM Joshua Rice via cctalk wrote: > > > -- Original Message -- > From: "Josh Dersch via cctech" > To: "General Discussion: On-Topic and Off-Topic Posts" > > Sent: Friday, 1 Oct, 2021 At 08:33 > Subject: ISO M100, M102, M633 flip chips for DEC TC08N controller

ISO M100, M102, M633 flip chips for DEC TC08N controller

Hey all -- I have a TC08 DECtape controller that I'd like to convert to a TC08N (the negibus version of the TC08). If I'm reading the documentation right, this involves swapping in a few flip chips -- M100 for the installed M101, M102 for M103, and M633 for M623. If anyone has any of these,

Re: PDP-11/73 boot issues

On Tue, Sep 21, 2021 at 12:05 PM Aaron Jackson via cctalk < cctalk@classiccmp.org> wrote: > Hi all, > > My PDP-11/73 has started misbehaving after several years of being very > stable. It is showing symptoms similar to when I've forgotten to enable > the LTC in the past, except this time, it is

Re: VAXstation 100 ROM image

On Tue, Sep 21, 2021 at 10:43 AM Jonathan Stone via cctalk < cctalk@classiccmp.org> wrote: > > > On Tuesday, September 21, 2021, 10:17:33 AM PDT, Chris Zach via cctech < > cct...@classiccmp.org> wrote: > > > > How the hell did I miss *that*? Cool beans device, I've never heard of a > > VS100. Was

Re: VAXstation 100 ROM image

On Tue, Sep 21, 2021 at 10:04 AM Zane Healy via cctalk < cctalk@classiccmp.org> wrote: > I’m rather wondering how I missed that Auction. That’s the first time > I’ve ever seen any photos of a VS100. I believe it required a UNIBUS card > to connect it to the VAX. > Yes, with a fiber optic link;

Re: More cleaning out the Bob basement

On Sun, Sep 19, 2021 at 1:39 PM Chris Zach via cctalk wrote: > On 9/18/2021 10:04 PM, Toby Thain via cctalk wrote: > > https://memegenerator.net/img/instances/64153952.jpg > > No problem with stopping the stupid wife stuff, but this is an important > issue: Cleaning out basement hoards like this

Re: HP-UX on 9000/200 series

On Tue, Aug 31, 2021 at 8:09 PM Paul Berger via cctalk < cctalk@classiccmp.org> wrote: > I have a couple of those CPU cards too, and they should fit a a 9826 or > 9836 as well, but looking at the pictures of that CPU card as posted on > hpmuseum.net the part number of the processor on the card is

Re: Extremely CISC instructions

On Wed, Aug 25, 2021 at 11:19 AM Tony Duell via cctalk < cctalk@classiccmp.org> wrote: > On Wed, Aug 25, 2021 at 7:07 PM ben via cctalk > wrote: > > > > On 2021-08-25 11:08 a.m., Josh Dersch via cctalk wrote: > > > > > (The Three Rivers PERQ included

Re: Extremely CISC instructions

On Mon, Aug 23, 2021 at 5:38 PM Tom Stepleton via cctalk < cctalk@classiccmp.org> wrote: > Hello, > > For the sake of illustration to folks who are not necessarily used to > thinking about what computers do at the machine code level, I'm interested > in collecting examples of single instructions

ISO: DEC H317-B (DH11) bulkhead panel

Hi all -- Recently picked up a DH11-AD and now I just need to track down an appropriate bulkhead panel to go with it. Originally this would have been the H317-B, I'm not sure if there were others that are directly compatible, but if anyone has one lying around drop me a line! Thanks! - Josh

Re: Items Wanted

On Tue, Jul 20, 2021 at 4:06 PM Jay Jaeger via cctalk wrote: > On 7/20/2021 6:59 AM, Eric Moore wrote: > > > > > > >> 11) ESDI disk emulator > > > > > > I am not aware of any such beasties in the wild. MFM, yes, but I > > haven't seen ESDI. I would love for such a thing to

ISO: Docs for Mostek MK8009-CA omnibus memory

Hey all -- Picked up a memory board for my PDP-8/A, it's a Mostek MK8009-CA, currently outfitted with 32KW of memory but with empty pads for another 32KW. Not a ton of documentation on this -- anyone have anything? At minimum, configuration information would be nice, I'd also like to know what

Re: Who has a working Terak?

On Sat, Jun 19, 2021 at 5:41 AM John Foust via cctalk wrote: > > One of the original UCSD Pascal team contacted me, asking if > any of my Teraks are still working. Sadly, they don't. > > I seem to remember hearing on the list that someone had re-capped and > re-socketed their Terak, and that

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

ISO: DW8E parts

Hi all -- I picked up a DW8E backplane from a friendly listmember this week and now I just need to find parts to populate it (a simple task, right?); I'm hoping to use it with my negibus PDP-8/I for my ongoing TSS/8 project(*) (in order to provide numerous serial lines and if I get really

Re: Writings on AI from 17 years ago....

On Tue, May 25, 2021 at 6:35 AM Tom Hunter via cctalk wrote: > I have learned not to trust any computer museum to properly look after any > artefacts in the long run. I have seen the following: > >- they lose funding and shut down; >- the building they had for free is sold or demolished

Re: PDP-8/I Negative-bus termination

On Wed, May 5, 2021 at 12:27 AM Vincent Slyngstad via cctalk < cctalk@classiccmp.org> wrote: > On 5/5/2021 12:03 AM, Josh Dersch via cctalk wrote: > > Until this point I've never had any peripherals for my negibus systems > > (apart from teletypes), and it occurs to m

PDP-8/I Negative-bus termination

Hey all -- I cabled up the RF08 to my 8/I this evening and it's showing some very faint signs of life -- a DIML instruction appears to do the right thing. That's about it. Until this point I've never had any peripherals for my negibus systems (apart from teletypes), and it occurs to me that I

Re: DEC PDP-11/45 backplane +5 ECO

On Sun, Apr 25, 2021 at 11:26 PM Fritz Mueller wrote: > > > On Apr 24, 2021, at 7:02 PM, Josh Dersch wrote: > > If you have notes on re-creating the harness, let me know. > > Hi Josh, > > A few pointers -- I think I left some of these in a comment on one of your > fb posts, but will repeat here

Re: DEC RF08/RS08 module placement info

On Fri, Apr 30, 2021 at 2:24 PM Mattis Lind wrote: > I did another check of the drawings and found a module list. > > Initially I was looking for something more graphic then I found this: > > https://imgur.com/a/hzmhwQ4 > > Hope it helps. > > /Mattis > Thanks so much, both for the pictures of

Re: DEC RF08/RS08 module placement info

On Sun, Apr 25, 2021 at 1:55 PM Mattis Lind wrote: > > > Den sön 25 apr. 2021 kl 22:43 skrev Josh Dersch via cctalk < > cctalk@classiccmp.org>: > >> Hi all -- >> >> In addition to the 11/45 project I'm also working on restoring an >> RF08/RS08 >

Re: DEC RF08/RS08 module placement info

On Sun, Apr 25, 2021 at 1:56 PM Vincent Slyngstad via cctalk < cctalk@classiccmp.org> wrote: > On 4/25/2021 1:42 PM, Josh Dersch via cctalk wrote: > > 2) Can someone with an RF08 and/or RS08 take a few detailed pictures of > the > > logic (from the handle side, of course)

DEC RF08/RS08 module placement info

Hi all -- In addition to the 11/45 project I'm also working on restoring an RF08/RS08 fixed head disk/controller (in the vain hopes of one day running TSS/8 on my PDP-8/I). I have the power supply repaired and running and I'm getting ready to power the logic up (the disc itself will be a project

Re: DEC H742a Power Supplies, for Parts (Seattle)

On Sat, Apr 24, 2021 at 12:37 PM Ethan Dicks wrote: > On Sat, Apr 24, 2021 at 2:51 PM Josh Dersch via cctalk > wrote: > > Fans are dead (either melted away entirely or rusted > > out). > > Are any of those melty fans Boxers? I'm still looking for a circlip > t

Re: DEC PDP-11/45 backplane +5 ECO

On Sat, Apr 24, 2021 at 1:36 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > Hi Josh, > > Among the pictures linked from your message about the H742a parts, there > is one picture of you backplane. I have been looking for some time for > information about the following 11/45 ECO:

DEC H742a Power Supplies, for Parts (Seattle)

Hey all -- I've started stripping down the "fire-sale" PDP-11/45 I picked up in November, in preparation for sanding and repainting the rack and processor chassis. There were two H742a supplies in the rack that I believe are too far gone to be reasonably restored (in particular the heat

Re: Is this a new record?

On Thu, Apr 22, 2021 at 7:33 PM Chris Zach via cctalk wrote: > Not anymore. I still need to figure out if/how to get the big monitor > out, but the little one is safe, as are two digitizers (one complete), a > mouse thing, and a keyboard. > I am still on the hunt for a PERQ keyboard and display

Is this a new record?

https://www.ebay.com/itm/164815576309 $9570 for a keyboard. As much as I'd like to find a keyboard for my Lambda's second head, I somehow doubt that's going to happen. And now I think I need to go find a really, really (really) safe place to keep the keyboard I *do* have... - Josh

Re: RSX11D disks on EBAY- anyone interested?

On Tue, Apr 6, 2021 at 10:59 PM Ethan Dicks via cctalk < cctalk@classiccmp.org> wrote: > On Tue, Apr 6, 2021 at 11:48 PM Al Kossow via cctalk > wrote: > > On 4/6/21 8:31 PM, Noel Chiappa via cctalk wrote: > > > > From: Al Kossow > > > > > > > I have to find my qbus rk11 card. > > > > >

Re: Help with PCB ID

On Sat, Mar 13, 2021 at 11:43 AM Cory Heisterkamp via cctalk < cctalk@classiccmp.org> wrote: > I’m wondering if anyone recognizes this PCB. Double-sided, 74xx vintage, > measuring 14”x15”. There’s a “B.I.” logo in one corner, but no google > match. IC date codes are ’77/’78 vintage. > > There’s

Re: DF32?

On Tue, Mar 9, 2021 at 3:39 PM Ethan Dicks wrote: > On Tue, Mar 9, 2021 at 6:10 PM Josh Dersch via cctalk > wrote: > > I have a bid on it right now, I was hoping to use it with my straight-8, > > should I be so lucky to win it. Don't want to collide with you, > howe

Re: DF32?

I have a bid on it right now, I was hoping to use it with my straight-8, should I be so lucky to win it. Don't want to collide with you, however... - Josh On Tue, Mar 9, 2021 at 3:04 PM Chris Zach via cctalk wrote: > There's a DF32 on Ebay. I've got a bid in on it, will see what happens. > >

Re: TSS/8 & dectape

On Sat, Mar 6, 2021 at 3:27 PM David Gesswein via cctech < cct...@classiccmp.org> wrote: > I'm having trouble using DECtapes with TSS/8 under SIMH. I tried with both > the > RF image and LCM RK05 image and no mater what I do it hangs if I try to > access a DECtape. > > I am trying to use COPY

Any interest in a Floating Point Systems AP-120 array processor?

I picked this up a number of years ago for reasons that entirely escape me. It's certainly neat, but I don't see myself ever actually using it and it's large and heavy. Documented here: http://bitsavers.trailing-edge.com/pdf/fps/7259-02_AP-120B_procHbk.pdf Mine appears to have a DEC-style

ISO: Stabilization feet for DEC H960 rack

I realize these are uncommon; curious if anyone has a spare pair somewhere (hey, that rhymes.) I'd like to be able to pull out the CPU on my 11/70 without worrying about the whole thing tipping over and crushing people I care about. It's the little things, really... Thanks! - Josh

Re: Massbus - was: Re: VAX 11/750

On Thu, Feb 25, 2021 at 12:27 PM Al Kossow via cctalk wrote: > On 2/25/21 10:43 AM, Chris Zach via cctalk wrote: > > Oh this is fun stuff. Is there a specification write-up anywhere on the > MASSBUS overall? > > there is some documentation on bitsavers > > the register descriptions were

Re: PDP-11/70 progress (and a cry for help)

On Wed, Feb 17, 2021 at 12:45 AM Josh Dersch wrote: > > > I hooked the LA up to the two PROM bits that select the AMX input (RACC > UAMX00 H and RACC UAMX01 H), on the ROM & Address Control board. These > come from the PROM at U101 and go through a 74S174 at E97 before heading > over to the DAP

Re: PDP-11/70 progress (and a cry for help)

On Tue, Feb 16, 2021 at 5:08 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > > On Tue, Feb 16, 2021 at 2:36 AM Fritz Mueller via cctalk < > cctalk@classiccmp.org> wrote: > > So you could set up on t4 or t5 of that microinstruction with the KM11... > > > On Feb 16, 2021, at 11:08 AM,

Re: PDP-11/70 progress (and a cry for help)

On Tue, Feb 16, 2021 at 2:36 AM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > > > > On Feb 16, 2021, at 1:13 AM, Josh Dersch wrote: > > My money's on t5 going wrong -- an ALU input mux or operation being > selected incorrectly, possibly. This also somewhat explains why execution >

Re: PDP-11/70 progress (and a cry for help)

On Mon, Feb 15, 2021 at 8:01 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > Hi Josh, > > In the situation you describe, I guess I would first chip clip '174s for a > slice of both PCA and PBC on the LA, run the troublesome instruction > sequence, and look at the trace. Check that

PDP-11/70 progress (and a cry for help)

Hi all -- Thought you all might be interested in an update, and I'm also looking for advice in debugging the current issue I'm hitting. After replacing the clock crystal on the TIG, the system started showing signs of life, but the Load Address switch would stop working after being powered on

Re: Reading ESDI disks

On Thu, Feb 11, 2021 at 9:45 AM Nigel Johnson via cctalk < cctalk@classiccmp.org> wrote: > > On 2021-02-11 12:41 p.m., Al Kossow via cctalk wrote: > > On 2/11/21 9:33 AM, Nigel Johnson via cctalk wrote: > >> I'm about to try the very same thing. > >> > >> I have a MicroVAX II with a sigma MSCP

Re: PDP-11/70 debugging advice

On Fri, Feb 5, 2021 at 12:29 AM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > > > > On Feb 4, 2021, at 9:45 PM, Josh Dersch wrote: > > The 11/70 is now somewhat operable. I can examine and deposit memory, > at least for a short while -- after the system warms up for 30 seconds or >

Re: PDP-11/70 debugging advice

On Thu, Feb 4, 2021 at 2:42 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > > > On Feb 4, 2021, at 1:51 PM, Josh Dersch wrote: > > [RC maintenance clock] Yeah, you'd think... but it doesn't work :). I > mentioned earlier in this thread that it's stuck in single-step mode. From >

Re: PDP-11/70 debugging advice

On Thu, Feb 4, 2021 at 10:19 AM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > > > > On Feb 3, 2021, at 8:07 PM, Josh Dersch wrote: > > Sure enough, TIGB XTAL H was a flat line. Nothing happening at the > crystal itself either. The crystal's casing was fairly corroded (which is >

Re: PDP-11/70 debugging advice

On Tue, Feb 2, 2021 at 12:30 AM Josh Dersch wrote: > > > On Sun, Jan 31, 2021 at 10:03 PM Fritz Mueller wrote: > >> >> >> > On Jan 31, 2021, at 8:19 PM, Josh Dersch wrote: >> > Well, what's interesting here is that on my system, switch S4 (MAINT >> STPR) steps the processor with switches S1

Re: Flip-Chip selloff

Since we're talkin' sell-off... on the off chance that anyone has a TC11 or TC01/08 gathering dust (for something less than eBay prices), I, uh... could use one. Along with many other people, I suppose. - Josh On Tue, Feb 2, 2021 at 3:12 PM Bill Degnan via cctalk wrote: > I think it's good

Re: PDP-11/70 debugging advice

On Sun, Jan 31, 2021 at 10:03 PM Fritz Mueller wrote: > > > > On Jan 31, 2021, at 8:19 PM, Josh Dersch wrote: > > Well, what's interesting here is that on my system, switch S4 (MAINT > STPR) steps the processor with switches S1 and S2 set to *any* > configuration. > > Hmm, would expect to see

Re: PDP-11/70 debugging advice

On Sun, Jan 31, 2021 at 7:55 PM Josh Dersch wrote: > On Sun, Jan 31, 2021 at 7:04 PM Fritz Mueller via cctalk < > cctalk@classiccmp.org> wrote: > >> > Yeah. I want to get the fans installed and then go triple-check all >> the power signals and get the voltages dialed in nicely. But then things

Re: PDP-11/70 debugging advice

On Sun, Jan 31, 2021 at 7:04 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > > Yeah. I want to get the fans installed and then go triple-check all the > power signals and get the voltages dialed in nicely. But then things come > out on extenders :). > > Yup -- I'm surprised how

Re: PDP-11/70 debugging advice

On Sun, Jan 31, 2021 at 5:05 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > Hi Josh, > > ZAP is effectively reset for the micro-architecture, forcing the ucode > address to known/initial value. It has multiple sources throughout the > processor, including tendrils into some of

Re: PDP-11/70 debugging advice

On Sun, Jan 31, 2021 at 2:39 PM Guy Sotomayor via cctalk < cctalk@classiccmp.org> wrote: > Did you check to make sure that power is wired correctly to the > PEP-70/Hypercache? They are typically installed in "empty" slots and > don't have power (or anything else) routed to them. They require

PDP-11/70 debugging advice

Hi all -- Making some progress with the "fire sale" PDP-11/70. Over the past month I've rebuilt the power supplies and burned them in on the bench, and I've gotten things cleaned up and reassembled. I'm still waiting on some new chassis fans but my curiosity overwhelmed my caution and I decided

Re: PDP-11/70 backplane wire list

On Fri, Jan 1, 2021 at 10:06 PM Eric Smith wrote: > On Fri, Jan 1, 2021 at 10:04 PM Josh Dersch via cctalk < > cctalk@classiccmp.org> wrote: > >> Discovered a broken wirewrap wire on the 11/70 I'm slowly working on, it's >> on the last slot (44), and runs from B

PDP-11/70 backplane wire list

Hey all -- Discovered a broken wirewrap wire on the 11/70 I'm slowly working on, it's on the last slot (44), and runs from BD2 to ??. White wire, part of a white/black twisted pair. I've been looking but haven't found a wire list for the backplane -- anyone have any leads, or, alternately, does

Re: Hey, I got a Perq_T2 image!!!

On Thu, Dec 31, 2020 at 12:20 PM Chris Zach via cctalk < cctalk@classiccmp.org> wrote: > Well, after waiting almost a month for the USPS to deliver a "Priority > Mail 1 day" package from Dave I now have the MFM reader card. So I > started working on these disks I rescued. First up was a ST506

Re: ISO: TI 980 (not 980A or 980B) Hardware docs

looks like a 980B to me. Here's a couple of pictures of what I have (note that the boards are placed mostly randomly right now, just for safekeeping): https://1drv.ms/u/s!Aqb36sqnCIfMpJFO9udIaPHKbzS5bg?e=L7RxCk - Josh > > > Thomas > > Am 30.12.2020 um 01:23 schr

Re: ISO: TI 980 (not 980A or 980B) Hardware docs

On Wed, Dec 30, 2020 at 2:07 AM Ethan Dicks wrote: > On Tue, Dec 29, 2020 at 8:23 PM Josh Dersch via cctalk > wrote: > > A straight TI 980 (not one of the later 980A or 980B variants) appeared > on > > my doorstep this afternoon. > > Interesting. Unfortunate

ISO: TI 980 (not 980A or 980B) Hardware docs

Hey all -- A straight TI 980 (not one of the later 980A or 980B variants) appeared on my doorstep this afternoon. While well-shipped, the person I got it from decided to ship the boards and power supply separately from the chassis -- and unfortunately didn't document where anything goes. There

Re: RL02 Tracking

On Mon, Dec 21, 2020 at 3:09 PM Jon Elson via cctalk wrote: > On 12/21/2020 01:08 PM, Aaron Jackson via cctalk wrote: > > Hi everyone > > > > I've posted a few times over the years about RL02 drives and my > > difficulty getting them working (no luck so far!). I've spent the past > > few days

Re: Ouch, but 2 Perqs out.

On Sat, Dec 12, 2020 at 6:31 PM Chris Zach wrote: > > DigiBarn has a few pictures of a PERQ 1 and a T2: > > > > http://www.digibarn.com/collections/systems/perqt2/index.html > > Yep, the 1 is out, and one of the other two is a T2 like the picture. > > > There's the rarer PERQ 2, which I have a

Re: Ouch, but 2 Perqs out.

On Sat, Dec 12, 2020 at 2:56 PM Chris Zach via cctalk wrote: > This was a long day. Went over to the house and started working on > getting the Perqs out of the basement. I've been moving smaller stuff to > make room and it was time. > > First up was a Perq1 chassis that just had the big disk

Re: Fire-Sale PDP-11 update (and request for parts)

On Sun, Dec 6, 2020 at 3:11 PM Fritz Mueller via cctalk < cctalk@classiccmp.org> wrote: > > > On Dec 4, 2020, at 10:41 PM, Josh Dersch via cctalk < > cctalk@classiccmp.org> wrote: > > I realize this is unlikely, but I was curious if anyone has 1) any > > par

Re: Problems with FORT and ALGOL in TSS/8

On Thu, Dec 3, 2020 at 9:38 PM Josh Dersch wrote: > On Thu, Dec 3, 2020 at 6:13 PM Kevin Jordan via cctalk < > cctalk@classiccmp.org> wrote: > >> >> >> Specifically, in the case of FORTRAN, the compiler exits with an error >> code >> 6204. This occurs even when trying to compile trivial "hello

Re: Help needed identifying old MFM drives from the excavation

On Tue, Dec 8, 2020 at 3:23 PM Chris Zach via cctalk wrote: > Good news: I'm going to get a reader on loan so I should be able to > image these things. I'll put them up on my web server here, if anyone > would like to take a look at them let me know. > > On a positive note it looks like the Perq

Re: Help needed identifying old MFM drives from the excavation

On Sun, Dec 6, 2020 at 7:34 PM Chris Zach wrote: > > I'd suspect that at least a few of these were from PERQ systems, given > > their provenance. Vertex V150s and Miniscribes were commonly used in > > the T2 models. As another listmember mentioned, Dave Gesswein's MFM > > emulator will image

Re: Help needed identifying old MFM drives from the excavation

On Sun, Dec 6, 2020 at 6:25 PM Chris Zach via cctalk wrote: > As the excavation of Bob's junkpile continues I have finally hit the MFM > layer. Specifically about 10 5.25 hard disks that look to be old style > MFM drives. > > Vertex V150 > Miniscribe 6085 > ST 4038M Seagate Franklin telecom

Fire-Sale PDP-11 update (and request for parts)

Thought you folks might be interested in a quick update on my folly here. At the beginning of November I drove down to the bay area to pick up the two fire-damaged PDP-11 systems -- a PDP-11/70 and a PDP-11/45. (I also made a few other stops and got a few other items, but that's not what I'm

Re: Problems with FORT and ALGOL in TSS/8

On Thu, Dec 3, 2020 at 6:13 PM Kevin Jordan via cctalk < cctalk@classiccmp.org> wrote: > Hi everyone, > > The Nostalgic Computing Center has a > virtual PDP-8 running TSS/8 > < > http://www.nostalgiccomputing.org:8080/aterm.html?m=pdp8=PDP-8=24=80 > > > in its

Re: Anyone want some LMI Lisp Machine tapes?

On Wed, Dec 2, 2020 at 10:20 AM Liam Proven via cctalk < cctalk@classiccmp.org> wrote: > https://www.ebay.de/itm/254795423667 > > €1 > > « > LISP MACHINE INC 1/2" Reel Tapes > > Anyone who opens this auction will know what this is - and how unique > these tapes are. > > The lot is consisting of

ISO: Keronix Omnibus 8K "E1" memory schematics / technical docs

Hey all -- Got a nice 8KW omnibus core memory board here, designated the "E1" from Keronix, that almost works except that bit 1 is off in the weeds somewhere. Not a lot of information out there on Keronix hardware, anyone have any docs? The board came with a sheet describing the addressing

Re: FIRE SALE!

On Sun, Oct 11, 2020 at 8:13 PM jim stephens via cctalk < cctalk@classiccmp.org> wrote: > > I agree. Most devices are expected to be heated briefly to soldering > temperatures, not heat soaked at that. > > Temperature in this case is much different than heat. The designers of > the devices must

Re: Identifying mystery TI ICs (Motorola MDP-1000 investigation continues...)

On Sun, Oct 4, 2020 at 11:42 AM Josh Dersch wrote: > On Sun, Oct 4, 2020 at 10:26 AM Brent Hilpert via cctalk < > cctalk@classiccmp.org> wrote: > >> On 2020-Oct-04, at 1:22 AM, Josh Dersch via cctalk wrote: >> >> > More mysteries while poking at the MDP-10

Re: Identifying mystery TI ICs (Motorola MDP-1000 investigation continues...)

On Sun, Oct 4, 2020 at 10:26 AM Brent Hilpert via cctalk < cctalk@classiccmp.org> wrote: > On 2020-Oct-04, at 1:22 AM, Josh Dersch via cctalk wrote: > > > More mysteries while poking at the MDP-1000. Spent some time this > evening > > working out the rest of the sign

Re: Datasheet / Info for Motorola SC5330 IC?

On Wed, Sep 30, 2020 at 7:48 PM Bob Rosenbloom via cctalk < cctalk@classiccmp.org> wrote: > On 9/30/2020 3:40 PM, Josh Dersch via cctalk wrote: > > On Wed, Sep 30, 2020 at 2:41 PM Gavin Scott via cctalk < > > cctalk@classiccmp.org> wrote: > > > >

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