ISO: I/O panel for Wangco ST-2222 (or similar) drive

Hi all -- Picked up a mostly complete Wangco ST- drive recently. This is a removable pack drive with one fixed platter, nominally Diablo 30 / RK05 compatible in terms of interface, but uses IBM 5540-style packs. It's in good condition and I'd like to restore it and see if I can interface it

Re: Looking for DEC RA80 (or RM80, R80) service manual (EK-ORA80-SV or similar)

On Fri, Oct 18, 2019 at 1:45 PM Antonio Carlini via cctalk < cctalk@classiccmp.org> wrote: > On 18/10/2019 05:51, Josh Dersch via cctalk wrote: > > > > (I should also note that there is an R80 service manual on Bitsavers -- I > > misspoke (mistyped?) in my initial

Looking for DEC RA80 (or RM80, R80) service manual (EK-ORA80-SV or similar)

Hi all -- I have an R80 drive in my VAX-11/730 cabinet that I'm trying to get running. Symptoms are: most of the time when the Run/Load switch is depressed, the drive will begin spinning up for 1-2 seconds (sometimes as long as 3-4 seconds) and then stop, faulting with error code 01 ("Spindle

Re: Looking for DEC RA80 (or RM80, R80) service manual (EK-ORA80-SV or similar)

On Thu, Oct 17, 2019 at 8:59 PM Glen Slick via cctalk wrote: > On Thu, Oct 17, 2019 at 8:45 PM Josh Dersch via cctalk > wrote: > > > > I haven't been able to find the actual service manual for the R80 (or the > > very closely related RA80 and RM80 drives). An

Re: UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

On Tue, Nov 19, 2019 at 2:26 PM Daniel Seagraves via cctalk < cctalk@classiccmp.org> wrote: > > On Nov 19, 2019, at 7:39 AM, Chris Zach via cctech < > cct...@classiccmp.org> wrote: > > > > Ah. Another solution to the fabled "MASSBUS" to anything adapter? > Putting it in at the RH11-C level would

Re: UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

eventually get it back someday. (Kidding.) - Josh (Not really kidding.) > > CZ > > On 11/19/2019 7:53 PM, Josh Dersch wrote: > > > > > > On Tue, Nov 19, 2019 at 2:26 PM Daniel Seagraves via cctalk > > mailto:cctalk@classiccmp.org>> wrote: &

TSS/8 on RK05

Hi all -- We've wanted to run TSS/8 on one of our PDP-8 systems at LCM+L for a long time now, and while we contemplated either (a) restoring our RF08 or (b) building an RF08 emulator, I decided it might be fun to investigate a third option: (c) modify TSS/8 to run off hardware we already have

Re: One old Sol, Two old names...

On Mon, Nov 25, 2019 at 6:43 PM William Sudbrink via cctalk < cctalk@classiccmp.org> wrote: > I've just had the pleasure of taking a new machine into my collection, a > Sol > 20. > > It's particularly interesting for several reasons. First, it was once in > the possession > > of Jim Willing

Re: TSS/8 on RK05

hes :). - Josh > > I had TSS/8 running years ago - on my PDP-12 and RF08 (w/2-disks!). > Unfortunately, I donated both to the CHM in the mid-90's - and they've been > sitting in their archives ever since :( > > Cheers, > Lyle > -- > > On Mon, 25 Nov 2019 22:03:47 -0

Re: Looking for documentation for VAX-11/730 ENKCC Diagnostic

On Tue, Nov 12, 2019 at 12:18 PM Jay Jaeger wrote: > Fiche - I have no ready way to scan them. Hundreds (in several > different DEC groupings). Not likely anytime soon. > If you're willing to send them out, the LCM would be happy to scan them and get the scans off to Al, etc. Thanks again,

Re: SEL mainframe

Thanks. I made an offer, I probably can't afford what he wants though, given the shipping involved. How you doing these days? - Josh On Sun, Oct 13, 2019 at 9:00 PM jim stephens via cctalk < cctalk@classiccmp.org> wrote: > I think this is the guy who has the warehouse full of crap in Texas

Re: Systems Engineering Laboratories SEL 810a Mainframe For Sale

Whereabouts is this located? When does it need to be picked up by? Thanks, Josh On Sun, Oct 13, 2019 at 6:02 PM Thomas Raguso via cctalk < cctalk@classiccmp.org> wrote: > WAREHOUSE LIQUIDATION UPDATE: > > I am taking offers on an SEL 810a mainframe computer. It includes three > cabinets, a

ISO: Service info for an ADDS Envoy 580

Got me an ADDS Envoy 580 (at least, I'm pretty sure it is -- it has no model designation apart from "Envoy" but looks identical to Jim's pictures at http://jimsoldtoys.blogspot.com/2016/05/adds-envoy-portable-terminal.html ). It's non-functional at the moment so it's going to need some repairs,

IBM Type 31 Alphabetical Duplicating Keypunch available, Seattle area

(resending as this appears to have gotten eaten last time...) Hi all -- As the subject line says I've got an IBM Type 31 Alphabetical Duplicating Keypunch sitting in my basement, in the Seattle area. It's in well-loved but decent physical condition and appears to be completely original. I have

Re: IBM Type 31 Alphabetical Duplicating Keypunch available, Seattle area

On Tue, Feb 11, 2020 at 9:44 AM Al Kossow via cctalk wrote: > > > On 2/11/20 8:28 AM, Rick Bensene via cctalk wrote: > > It has a label on it that says "BR 2412". > > Bunker-Ramo, originally Nuclear Data NDP-812 > Yep. 12-bit machine, four accumulators, multiply/divide logic standard. All

Re: UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

On Tue, Jan 28, 2020 at 4:25 AM Jörg Hoppe via cctalk wrote: > Hi Pontus, > > This thread makes me very happy. > > > > I have a KS10 that I'm working on (quite slowly). The PSU is checked out > > and working. Then console seems to work, I can deposit/examine to CRAM > > and RAM. > > > > Next

Re: Opening a MicroVAX 2000

On Mon, Feb 10, 2020 at 10:21 PM Antonio Carlini via cctalk < cctalk@classiccmp.org> wrote: > I'm trying to non-destructively open up a MicroVAX 2000. > > > I've removed the bottom "dressing" section (which holds some of the I/O > connectors) but the next step isn't obvious. None of the manuals

Re: Info / packs for Amcodyne 7110 "Arapahoe" drive?

Thanks everyone for the information -- that definitely looks like the same drive mechanism. I had no idea HP sold a drive like that. I think I may wait for the price to come down a bit on those packs, though :). - Josh On Fri, Jan 10, 2020 at 1:23 PM Al Kossow via cctalk wrote: > some packs

Info / packs for Amcodyne 7110 "Arapahoe" drive?

Hi all -- Got one of these: http://www.bitsavers.org/pdf/amcodyne/7110/Arapahoe_7110_Brochure_Nov84.pdf sans power supply and packs. I'm guessing that these packs were specific to this drive and not any sort of standard, and that tracking one down is going to require quite a bit of luck.

Re: ISO: Documentation for Interphase SMD 2181 disk controller

On Tue, Apr 7, 2020 at 10:29 AM Al Kossow via cctech wrote: > On 4/7/20 10:03 AM, Bill Degnan wrote: > > > Wondering if you can get/inquire from http://retrotechnology.com/#multi > > site. > Manuals are not always listed there, you have to ask. > > Bill > > Herb is on the intel-devsys mailing

ISO: Documentation for Interphase SMD 2181 disk controller

Subject line says it all. The Lambda uses this as its disk controller and it's looking like the one in mine needs some debugging. There doesn't seem to be any documentation for this controller out there. There are docs for the Interphase SMD 2180 on Bitsavers but it appears to be a very

Re: ISO: Cipher F880 tape drive, Fujitsu Eagle disk drive

fore taking them on.). - Josh > > -mike > > -Original Message- > From: cctalk On Behalf Of Josh Dersch via > cctalk > Sent: Friday, April 3, 2020 3:42 PM > To: General Discussion: On-Topic and Off-Topic Posts < > cctalk@classiccmp.org> > Subject:

ISO: Cipher F880 tape drive, Fujitsu Eagle disk drive

I'm working on restoring an LMI Lambda, which is missing both its tape drive and its disk drive. If anyone has a Cipher F880 9-track drive or a Fujitsu Eagle SMD drive, drop me a line. Be nice if they were in working condition, but so long as they're repairable I can work with 'em. Thanks! Josh

Re: PDP-8 Straight 8 restoration

On Sun, Mar 29, 2020 at 1:48 PM Brendan McNeill via cctech < cct...@classiccmp.org> wrote: > Here in NZ and around the world many of us are in lockdown and spending > more time on our computers, if that were possible. I have just completed > the restoration of a PDP-8 Straight 8 which I believe

Re: Bob Davis and old computer stuff

Also, I'd love to see the pictures to help narrow down what's important, etc. - Josh On Sat, Apr 25, 2020 at 3:12 PM Josh Dersch wrote: > I've recently been working on archiving a huge pile of PERQ floppies. I'd > be more than happy to help archive any media, including the sc

Re: Bob Davis and old computer stuff

I've recently been working on archiving a huge pile of PERQ floppies. I'd be more than happy to help archive any media, including the scanning of documentation. I know that Bob had an extensive collection, and some of this is likely to be the only copies of such media left in existence. Also,

Re: In search of Three Rivers PERQ 1 Keyboard

On Thu, Apr 30, 2020 at 2:53 PM Al Kossow via cctalk wrote: > On 4/30/20 8:11 AM, Al Kossow via cctalk wrote: > > On 4/30/20 2:44 AM, Chris Zach via cctalk wrote: > >> what does it look like? > > > > https://en.wikipedia.org/wiki/PERQ > > > > > or

Imlac/Hazeltine Dynagraphic terminals?

Anyone have any idea if any Imlac/Hazeltine Dynagraphic terminals are still around? I've never heard tell of one beyond marketing information. These were late vector-graphics terminals made by Imlac Corporation after they got bought out by Hazeltine in the late 1970s. Any technical docs

ISO: Diablo 30 heads

Hi all -- I'm restoring a Xerox Alto and I started going over the system's Diablo 30 drive. The heads are in bad shape; the bottom one is actually missing both parts of the erase poles (so the black portion of the head no longer makes a "t", it's just a black line). This means the head (in

ISO: DEC VR100 and early X releases

Hi all -- I was fortunate enough to be able to complete my VAXstation 100 setup this week, after a years-long search for parts. (In particular the M7452 fiber optic interface and the fiber optic cabling itself.) After futzing with the 4.3bsd kernel and compiling X10R4 on my VAX-11/750, I

Re: ISO: DEC VR100 and early X releases

On Tue, Sep 8, 2020 at 3:11 PM Matt Burke via cctalk wrote: > On 05/09/2020 20:19, Josh Dersch via cctalk wrote: > > While I'm at it -- anyone know > > precisely what I need to use this under VMS? I believe 4.7 was the last > > VMS release that supported it, but there wer

Re: Care and feeding of some Lisp machines (TI Explorer and Xerox Star)

On Tue, Sep 15, 2020 at 2:31 PM Al Kossow via cctalk wrote: > On 9/15/20 2:24 PM, Michael Engel via cctalk wrote: > > >> A simulator is in development. > > > > I found this web page by Seth Morabito: > https://loomcom.com/blog/0120_the_next_emulator.html > > Is this the simulator that is under

Re: Care and feeding of some Lisp machines (TI Explorer and Xerox Star)

On Mon, Sep 14, 2020 at 6:35 AM Michael Engel via cctech < cct...@classiccmp.org> wrote: > Hi, > > for a planned exhibition, I am thinking of restoring two of the machines > to working state again that are in storage here for decades: > > - A TI Explorer ("Sperry" labeled) > and > - A Xerox Star

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: > > > >

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

ISO: Motorola MDP-1000 info/software

Hi all -- This is a long shot, but I was curious if anyone might have information on the Motorola MDP-1000 minicomputer. I picked one up recently and I'm working on restoring it. Of particular interest is the power supply, which is external to the processor and which I am missing. I think I

Re: Disabling SCSI parity checking to dump disk on ACB4000 MFM-SCSI adapter?

On Wed, Sep 23, 2020 at 1:28 PM Michael Engel via cctech < cct...@classiccmp.org> wrote: > > > On 9/23/20 8:54 PM, Grant Taylor via cctech wrote: > > On 9/23/20 12:51 PM, Michael Engel via cctech wrote: > >> Do you know if is there another OS which would make it easier to > >> change crucial SCSI

Re: Revived Terak 8510

On Thu, Sep 24, 2020 at 10:57 AM John Foust via cctalk < cctalk@classiccmp.org> wrote: > > Mine stopped working a decade or so ago. I have a dozen or so, > but none are powering up any more. > > I seem to remember someone here who'd revived one. Did it mean > replacing sockets, replacing caps?

Re: Datasheet / Info for Motorola SC5330 IC?

On Wed, Sep 30, 2020 at 2:41 PM Gavin Scott via cctalk < cctalk@classiccmp.org> wrote: > Josh wrote: > > https://1drv.ms/u/s!Aqb36sqnCIfMpIVXm5draSrWHGMzJg > > Would these potentially be the sense amp / comparators for the core? I > wonder if they were anything like: > >

Datasheet / Info for Motorola SC5330 IC?

I'm in the middle of working out the pinout for the power supply connector on the MDP-1000. I'm aided somewhat by a set of test points on the backplane, unfortunately the "+" and "-" symbols (in the solder mask labels next to the test points) are nearly indiscernible, so I'm trying to verify that

Re: ISO: Motorola MDP-1000 info/software

On Wed, Sep 30, 2020 at 5:20 AM ED SHARPE via cctalk wrote: > whats the story on this...i see items but no pix. also check > your spelling on Motorola; Instrmentation and Control, Inc. that is in > the index. let me now if there is a photo group for this at least > with the

Re: Living Computer Museum

On Thu, May 28, 2020 at 1:36 PM William Donzelli via cctalk < cctalk@classiccmp.org> wrote: > > This is one of the things that disappointed me most about the Computer > History Museum in Mountain View, CA. Sure you can’t let the public interact > with *everything*, but since so much of computing

DEC VR260 service docs / common failure modes?

Hi all -- Picked up a non-functional but otherwise nice looking DEC VR260 (19" b monitor) on the cheap, hoping to use it with my VAXstation 2000. From what I've read, these were never the most reliable displays. Curious if anyone has any information on common failure modes, or has service docs

Re:

I disagree. On Wed, Jul 1, 2020 at 1:49 PM Bill Degnan via cctalk wrote: > Totally. > > On Tue, Jun 30, 2020, 5:05 PM William Pechter via cctalk < > cctalk@classiccmp.org> wrote: > > > >

Tri-Data Cartrifile parts/interfaces/tapes?

Hi all -- I picked up a Tri-Data Cartrifile 4096 at VCF West last year and since I'm suddenly going to have more time on my hands, I thought it'd be fun to see if I can get it running again. The Cartrifile is a tape drive that uses cartridges containing continuous-loop 1/4" tape in various

Re: Fixing an RK8E ....

On Fri, Jun 19, 2020 at 12:24 PM Robert Armstrong via cctech < cct...@classiccmp.org> wrote: > It appears that my RK8E has a problem - it fails the diskless control > test > with > > .R DHRKAE.DG > SR= > > COMMAND REGISTER ERROR > PC:1160 GD: CM:0001 >

Re: PDP-8/A transformer hum

On Tue, Jun 9, 2020 at 7:44 AM Jon Elson wrote: > On 06/09/2020 01:59 AM, Josh Dersch via cctalk wrote: > > Hi all -- > > > > I'm working on a PDP-8/A I picked up at VCF West last summer. After a > lot > > of cleaning and some power supply repair it's showin

PDP-8/A transformer hum

Hi all -- I'm working on a PDP-8/A I picked up at VCF West last summer. After a lot of cleaning and some power supply repair it's showing signs of life (CPU seems to be at least minimally functional, core memory is going to need some debugging.) The transformer in the power supply is humming

Re: Help identifying mystery Dataram VAX-11/750 (?) board

On Thu, Jul 16, 2020 at 2:11 PM Glen Slick via cctalk wrote: > On Thu, Jul 16, 2020 at 1:42 PM Josh Dersch via cctalk > wrote: > > > > I think I may have answered my own question here; looks like it's for a > VAX > > 8000 series: > > > > https://www

Help identifying mystery Dataram VAX-11/750 (?) board

Hi all -- Picked up a board advertised as a "4mb memory board" for a VAX-11/750. It's made by Dataram and I'm unsure of the model number, based on photos of it. I just noticed that rather than being a hex-height board that goes in the memory backplane, it looks like a board that goes in the main

Re: Help identifying mystery Dataram VAX-11/750 (?) board

On Thu, Jul 16, 2020 at 1:34 PM Josh Dersch wrote: > Hi all -- > > Picked up a board advertised as a "4mb memory board" for a VAX-11/750. > It's made by Dataram and I'm unsure of the model number, based on photos of > it. I just noticed that rather than being a h

Re: Wanted: misc TU56 parts for use with a TD8-E

On Sun, Aug 16, 2020 at 5:39 PM Thomas Moss via cctalk < cctalk@classiccmp.org> wrote: > Hi All, > > I'm looking for the following parts to configure my TU56 for use with a > TD8-E: > > G742 (Positive Logic Jumper Card) > M960 (TU56/TD8-E Command Cable Connector) > M961 (TU56/TD8-E Data Cable

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: 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

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

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 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 occu

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: 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: 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

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: 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: 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

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: 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

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: 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

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 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 dial

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 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 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

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. >

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 >

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

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

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

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: 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 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 >

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: 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)

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 >

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

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: 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

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

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

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 sys

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: 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: 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. > > > > >

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