Re: Diskette size

> On Jul 21, 2017, at 3:42 PM, Fred Cisin via cctalk > wrote: > > On Fri, 21 Jul 2017, Paul Koning via cctalk wrote: >> Interesting. Another example, slightly later, is the audio unit of the >> PLATO IV terminal (1974 or thereabouts). It uses a rather large dis

Re: VT320 Isn't working right

A couple of things to check: 1. Are you using a null modem cable? You need that. 2. Is the baud rate set correctly? 9600 is typical for DEC consoles. paul > On Jul 23, 2017, at 7:27 PM, Douglas Taylor via cctalk > wrote: > > All > > I have a DEC VT320 that powers up just fine, sees

Re: RK05 head alignment -- how difficult?

> On Jul 24, 2017, at 2:31 PM, Fritz Mueller via cctalk > wrote: > > Thanks for the advice, per usual, folks! > > To answer the question of "where hard to see", I guess it's really an issue > of my old-man-eyes at this point. I find I need to use a jeweler's headset, > or even bench microsc

Re: ✉Re: an interesting article

> On Jul 25, 2017, at 10:50 AM, geneb via cctalk wrote: > > On Tue, 25 Jul 2017, Leigh Paulson via cctalk wrote: > >> Hey! >> >> >> I've just found that article and thought it might be really helpful to you, >> you may find it here http://coffeesystem.malware/principal.php?4647 >> >> >> Wa

Re: The first CD

> On Jul 28, 2017, at 9:19 AM, Sam O'nella via cctalk > wrote: > > I dont think I've heard if the history of the technology behind cds. Was it > SRI? I only thought the first cdrom software at least was that encyclopedia > on CD? > This being 14" just sounds like a disk platter. It's obviou

Re: DECstation 220 Impasse Reached

> On Jul 28, 2017, at 1:04 PM, Rob Jarratt via cctalk > wrote: > > Anyone have any thoughts on whether those data signals look right? It's hard to guess at signals when the horizontal and vertical scales are not stated, nor where in the circuit the signal was found. paul

Re: 8mm cinemax type film players (almost OT)

> On Jul 29, 2017, at 11:08 AM, ANDY HOLT via cctalk > wrote: > > > > I guess that depends on your opinion of "reasonable". > > I have a number of 8mm home videos my father made but every place I looked > at was prohibitively expensive (several hundred dollars per reel!!) Wow. I just d

Re: Freight Shipping

> On Jul 31, 2017, at 11:15 PM, Ali via cctech wrote: > > I know this topic comes up pretty regularly and I am sorry to post about it > again but any recommendations for a freight shipper from Atlanta, GA to LA, > CA? > > I am trying to ship an empty 22U Rack. The seller can wrap it and place

Re: 2.11BSD on two RL02 drives? Probably not, but...

> On Aug 4, 2017, at 4:14 AM, Christian Corti via cctalk > wrote: > > On Thu, 3 Aug 2017, emanuel stiebler wrote: >> On 2017-08-03 11:12, Al Kossow via cctalk wrote: >>> It would be nice, though if someone just finished a MSCP controller with a >>> CF or SD on it. >> >> I don't think there is

Re: 2.11BSD on two RL02 drives? Probably not, but...

> On Aug 4, 2017, at 1:17 PM, David Bridgham via cctalk > wrote: > > ... > So my question is: do industrial SD cards exist? Yes; we've been using them for years now in the products I work on. While you can still wear them out if you beat on them hard enough, they do have good reliability.

Re: 2.11BSD on two RL02 drives? Probably not, but...

> On Aug 4, 2017, at 2:36 PM, Al Kossow via cctalk > wrote: > > > > On 8/4/17 11:14 AM, Warner Losh via cctalk wrote: >> most SD cards can easily handle 100-200 writes > > The issue would be things like the swap partition on a unix disk > or whatever the equivalent is under RSX Probably not

Re: 2.11BSD on two RL02 drives? Probably not, but...

> On Aug 4, 2017, at 3:46 PM, Noel Chiappa via cctalk > wrote: > >> From: David Bridgham dab at froghouse.org > >> I'm going to have enough fun with trying to implement the USB stack in >> the FPGA > > ISTR discussing putting a PDP-11 into the FPGA (there are Verilog PDP-11's > available), s

Re: PDP-11/84 Bootstrap for TSV05 (Dilog DU142)

> On Aug 9, 2017, at 2:58 PM, Ulrich Tagge via cctalk > wrote: > > Hi All, > I have some trouble to get the Bootstrap for an Dilog DU142 (TS11) Controller > running on my PDP-11/84. > The bootstrap on page 3-2 of the following documentation was used: > http://bitsavers.informatik.uni-stuttgar

Re: PDP-11/84 Bootstrap for TSV05 (Dilog DU142)

> On Aug 10, 2017, at 12:24 PM, Ulrich Tagge wrote: > > > > Am 10.08.2017 um 17:19 schrieb Paul Koning: >>> On Aug 9, 2017, at 2:58 PM, Ulrich Tagge via cctalk >>> wrote: >>> >>> >>> Type a command then press the RETURN key: B MS0 >>> Trying MS0 >>> 001120 >>> @ >> You're getting an I/O er

Re: PDP-11/84 Bootstrap for TSV05 (Dilog DU142)

> On Aug 10, 2017, at 1:03 PM, Ulrich Tagge wrote: > > Hi Paul, > > Yes it's an 11/84 so 22Bit. > > I corrected 1050 to 100421 and have now these outcome. > > ROM ODT> 001000/012700 > ROM ODT> 001002/172520 > ROM ODT> 001004/012701 > ROM ODT> 001006/172522 > ROM ODT> 001010/005011 > ROM ODT>

Re: PDP-11/84 Bootstrap for TSV05 (Dilog DU142)

> On Aug 10, 2017, at 3:15 PM, Ulrich Tagge wrote: > > I missed a Line: > > @17772522/100210 According to the manual, that says special condition, and termination code 4. Which is "recoverable error". What that means isn't clear from the register. It appears you need to look at the extende

Re: RX01 and RL01 on same UNIBUS system

> On Aug 17, 2017, at 4:48 PM, william degnan via cctech > wrote: > > Just curious, > Is there anyone out there with a combo RX01 and RL01 on the same UNIBUS > system, today? Are there any known issues? > > I found a large box of RX01 disks, lucky me. Working to get the RX01 drive > running,

Re: PSU Input Rectifier Question

> On Aug 28, 2017, at 7:49 AM, Rob Jarratt via cctalk > wrote: > > My recently acquired DECstation 5000/240 has had a PSU failure. After > replacing a couple of small capacitors with high ESR, I have been doing some > basic checks to see which stages are working. My first step has been to > che

Re: PSU Input Rectifier Question

> On Aug 28, 2017, at 12:52 PM, Rob Jarratt via cctalk > wrote: > > ... > Interesting that Tony mentions a Triac. There is indeed a triac. I am using > 220/240V input (being in the UK), would it be expected to double the voltage > in this case to 325V? No, 325V DC is what you'd get out of a

Re: IEEE publishes "In Search of the Original Fortran Compiler" - Paul McJones

> On Aug 28, 2017, at 3:19 PM, Chuck Guzis via cctalk > wrote: > > ... > There were two version of the character set--the "commercial" version > lacked parentheses, for example. Thank heavens that most 026s were > equipped with the "scientific" set. If you were unfortunate enough to > have to

Re: oh, this is great news!

> On Sep 1, 2017, at 1:43 PM, Chuck Guzis via cctalk > wrote: > > > What it is is spam--and itflunked the Spamassassin spam tests: > > X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on mx2.ezwind.net > X-Spam-Flag: YES > X-Spam-Level: > > So, why it was passed and not s

Re: Computers before Information Theory

> On Sep 6, 2017, at 1:25 PM, Fred Jan Kraan via cctalk > wrote: > > While reading a biography of Claude Shannon, I try to get a picture how > computers were seen and used before Information Theory emerged. It might be > something like this: > > Before Information Theory, computers were main

Re: Computers before Information Theory

> On Sep 10, 2017, at 1:22 PM, Noel Chiappa via cctalk > wrote: > >> From: Brent Hilpert > > ... > >> When/what/who was the actual first assembler conceived or produced? > > A very good question indeed! Does anyone know? I don't. But I can point to an early example of a quite primitive ass

Re: RIP Jerry Pournelle, the first author to write a novel on a computer Earl...

> On Sep 10, 2017, at 5:24 PM, Fred Cisin via cctalk > wrote: > > On Sun, 10 Sep 2017, couryho...@aol.com wrote: >> then. who was. the TRUE first? > > Michael Shrayer's girlfriend? > And what motivated him to write "Electric Pencil"? > Jerry started using it early on, but he was NOT

Re: RIP Jerry Pournelle, the first author to write a novel on a computer Early adopt

> On Sep 10, 2017, at 10:55 PM, Chuck Guzis via cctalk > wrote: > > On 09/10/2017 06:25 PM, Tapley, Mark via cctalk wrote: > >> There was one of those machines in my Junior High School shop >> classroom. I saw it run once (not well enough to successfully set a >> line of type, but nearly). >>

Re: Convex C220 lives

> On Sep 11, 2017, at 2:15 PM, Chuck Guzis via cctalk > wrote: > > On 09/11/2017 08:47 AM, Camiel Vanderhoeven via cctalk wrote: > >> Now I¹m looking for some FORTRAN code that would typically have run >> on this kind of computer so I can show people what this kind of >> system was used for. >

Re: Tips For Soldering a Surface Mount PLCC Socket

> On Sep 11, 2017, at 2:23 PM, shad via cctalk > wrote: > > Hello, > in my experience SMD components doesn't need a presoldering operation at > all, because pins are already stained or golded, thus very solderable > > Note: use lower temperatures (<380C, less is better), good quality f

Re: ETAOIN SHRDLU (Was: RIP Jerry Pournelle, the first author to write a

> On Sep 12, 2017, at 4:06 AM, Rob Doyle via cctalk > wrote: > > On 9/11/2017 8:35 PM, Fred Cisin via cctalk wrote: >> Etaoin Shrdlu was most importantly one of Walt Kelly's characters in Pogo. >> ETAOIN SHRDLU ETA name >> On Mon, 11 Sep 2017, Chris Elmquist via cctalk wrote: >>> I was told t

Re: Tips For Soldering a Surface Mount PLCC Socket

> On Sep 12, 2017, at 1:45 PM, Rob Jarratt via cctalk > wrote: > > Thanks for all the suggestions, I am still a little undecided on what to do, > so I have a few follow-up questions > > 1. Pete, you said to use solder paste and associated flux. I had a look on > the Farnell site and there se

Re: Rainbow Disk Imager

> On Sep 14, 2017, at 12:27 PM, jim stephens via cctalk > wrote: > > > > On 9/14/2017 9:19 AM, Fred Cisin via cctalk wrote: >> You have some .dsk images of SSDD 96tpi for 11/73. > I have some also, and would love if there is a writeup of a known working > procedure to use as a reference. >

Re: Rainbow Disk Imager

> On Sep 14, 2017, at 12:41 PM, Paul Koning via cctalk > wrote: > > >> On Sep 14, 2017, at 12:27 PM, jim stephens via cctalk >> wrote: >> >> >> >> On 9/14/2017 9:19 AM, Fred Cisin via cctalk wrote: >>> You have some .dsk images of

Re: Rainbow Disk Imager

> On Sep 14, 2017, at 1:37 PM, Rod Smallwood via cctalk > wrote: > > ... > Sounds good. > But I have to work with what I have: > > An 11/73 with: > ... > There's no Linux systems, no C compilers, emulators or weird hardware > available. Understood. I was commenting on a more general questio

Re: Rainbow Disk Imager

> On Sep 14, 2017, at 4:39 PM, Warner Losh wrote: > > ... > I don't see where you read the first 2 tracks uninterlaced, and the other > tracks interlaced? For DOS formatted disks, that's what's required. While > screwing up the first two tracks won't affect your ability to read DOS > floppie

Re: Rainbow Disk Imager

> On Sep 14, 2017, at 4:47 PM, Warner Losh wrote: > > > > On Thu, Sep 14, 2017 at 2:44 PM, Paul Koning > wrote: > > > On Sep 14, 2017, at 4:39 PM, Warner Losh > > wrote: > > > > ... > > I don't see where you read the first 2 tracks unin

Re: Interlace/interleave, skew, side pattern (Was: Rainbow Disk Imager

> On Sep 14, 2017, at 10:44 PM, Fred Cisin via cctalk > wrote: > > ... > Alternatively, you could leave the sectors in sequential order, but not put > each data block of the file into the sector of the same number. > Thus, you could put the first data block of the file into the first sector,

Re: RIP Jerry Pournelle - Firsts

> On Sep 13, 2017, at 12:47 AM, Eric Smith via cctalk > wrote: > > On Mon, Sep 11, 2017 at 7:43 PM, Charles Dickman via cctalk < > cctalk@classiccmp.org> wrote: > >> On Mon, Sep 11, 2017 at 1:15 PM, Shoppa, Tim via cctalk >> wrote: >>> He seems to have been the first to mention ARPANET in a p

Re: DEC H9xx rack parts needed

> On Sep 16, 2017, at 9:52 AM, Noel Chiappa via cctalk > wrote: > >> does anyone have any spare "pivot bushings" for the DEC H9xx series >> cabinets (H950, H960, etc)? (These are the short pieces with a conical >> top which fit over the hinge pins, at the bottom.) >> ... >> I could also use som

Re: DEC H9xx rack parts needed

> On Sep 16, 2017, at 4:10 PM, Paul Koning via cctalk > wrote: > > >> On Sep 16, 2017, at 9:52 AM, Noel Chiappa via cctalk >> wrote: >> >>> does anyone have any spare "pivot bushings" for the DEC H9xx series >>> cabinets (H950, H960

Re: DEC H9xx rack parts needed

> On Sep 16, 2017, at 7:44 PM, Chuck Guzis via cctalk > wrote: > > On 09/16/2017 03:21 PM, Steve Malikoff via cctalk wrote: > >> Yes I agree they both appear to be simple machining jobs. As a substitute >> for drill rod... > > I'm unclear why the recommendation has been for "drill rod" (i.e.

Re: EMI filter in PDP-11/23

If all else fails, a pair of wires will do. You don't actually need an EMI filter for the thing to work. But it's good to have one to keep EMI within factory specs. So I'd classify these devices as "optional but desirable". paul > On Sep 22, 2017, at 12:12 PM, Aaron Jackson via cctal

Re: formatting MFM drives on a IBM PC

> On Sep 27, 2017, at 7:55 AM, Bill Gunshannon via cctalk > wrote: > > ... > I have never had to do that. The only boxes I ever LLF disks for > were PDP-11's and VAX. And then, only once, on initial install. DEC was all over the map as far as disk formatting goes. Some packs were delivered

Re: DEC manual typeface

> On Sep 27, 2017, at 9:38 PM, Toby Thain via cctalk > wrote: > > On 2017-09-27 9:33 PM, Charles Dickman via cctalk wrote: >> For those interested in all things DEC, I found a typeface that is >> very close to the typeface used in the old 60's and very early 70's >> manuals. Google for "Functio

Re: formatting MFM drives on a IBM PC

> On Sep 28, 2017, at 12:04 PM, Jon Elson via cctalk > wrote: > > On 09/28/2017 10:31 AM, Chuck Guzis via cctalk wrote: >> And even the sector size on recent drives is fictitious. Larger drives use >> 4K sectors but "translate" them to the 512 byte standard. > So, for every write, it needs to

Re: formatting MFM drives on a IBM PC

> On Sep 28, 2017, at 8:36 PM, Chuck Guzis via cctalk > wrote: > > On 09/28/2017 05:12 PM, Jules Richardson via cctalk wrote: >> On 09/27/2017 09:59 AM, Ethan via cctalk wrote: >>> The idea of IDE, as my understanding, is the controller that existed >>> as an >>> ISA card was moved onto the act

Re: formatting MFM drives on a IBM PC

> On Sep 29, 2017, at 11:29 AM, Chuck Guzis wrote: > > On 09/29/2017 06:07 AM, Paul Koning wrote: > >> There are chips that convert between serial and parallel ATA; one of >> those could perhaps be used. I'm more used to applying them for >> attaching a serial ATA controller to a parallel ATA

Re: HP 7970E - interest to split?

> On Sep 29, 2017, at 12:33 PM, Jon Elson via cctalk > wrote: > > On 09/29/2017 10:56 AM, Henk Gooijen via cctalk wrote: >> >> >> >> On a related note my plan is to make a USB-based, Pertec-compatible >> controller for it. Not sure how SimH connects with peripherals so I'm >> /very/ eager to

Re: HP 7970E - interest to split?

> On Sep 30, 2017, at 11:50 AM, Stefan Skoglund via cctalk > wrote: > > fre 2017-09-29 klockan 12:52 -0400 skrev Paul Koning via cctalk: >> ... >> The approach would be somewhat similar to the disk support in SIMH, which >> does already have "RAW" as o

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

> On Oct 2, 2017, at 8:22 AM, Jules Richardson via cctalk > wrote: > > Does anyone know why IDE/ATA even came about? I mean, why SCSI wasn't used? > It would have been an established standard by then, the drive complexity > seems comparable to IDE/ATA (i.e. intelligent commands over a paralle

Re: DECstation 5000/240 Thickwire Connector

> On Oct 4, 2017, at 5:37 PM, Peter Coghlan via cctalk > wrote: > >> >> The thickwire connector on my DECstation 5000/240 does not have the sliding >> lock on it, instead it has standoffs with threaded screw holes (like any >> normal serial/parallel connector). This means that the thickwire ad

Re: Owens Illinois Digivue technical info

It would be great to get those scanned. It seems that documentation of the O-I display devices and related power supplies is quite rare, so it would be good to make sure whatever is available gets collected. I have power supply documentation (copies), will try to get those scanned. p

Re: Aaron Nabil & pdp-8.org

> On Oct 6, 2017, at 5:10 AM, Peter Coghlan via cctalk > wrote: > > ... > Same here. I get a "server failed" DNS error when trying to look up pdp8.org. I get "No such domain" both from my own DNS server, and from the one at Google (8.8.8.8). But "whois" shows the name registered to Aaron, e

Re: The origin of the phrases ATA and IDE [WAS:RE: formatting MFM drives on a IBM PC]

> On Oct 5, 2017, at 6:19 PM, allison via cctalk wrote: > > Moore's law only worked for hardware, software lagged typically two > years behind. There's a more cynical view, sometimes called "the virtual disease", which is that software performance is constant because all the gains from Moore's

Re: Aaron Nabil & pdp-8.org

> On Oct 6, 2017, at 4:19 PM, Tomasz Rola via cctalk > wrote: > > ... > Of course a site may go any moment. Any site, I mean. True. If it's still around (even if only via IP address), judicious use of "wget" can preserve the whole thing. I did that with a particularly interesting website I

Re: What's the matter with kids today (Was: The origin of the phrases

> On Oct 6, 2017, at 5:21 PM, Fred Cisin via cctalk > wrote: > > On Fri, 6 Oct 2017, Chuck Guzis via cctalk wrote: >> I take it that your students didn't read Don Knuth's wonderful book on >> sorting and searching--the one with the fold-out chart on various tape >> sorts--including those for ta

Re: What's the matter with kids today (Was: The origin of the phrases

> On Oct 6, 2017, at 5:39 PM, Fred Cisin via cctalk > wrote: > >>> These students weren't quite ready for Knuth. They were second and third >>> semester. > > On Fri, 6 Oct 2017, Paul Koning wrote: >> Second and third semester of what, high school? Anyone qualified to be in a >> college CS

Re: PDP-Lifter

> On Oct 7, 2017, at 5:51 PM, Mark Linimon via cctalk > wrote: > > On Sat, Oct 07, 2017 at 01:34:44PM -0700, Chuck Guzis via cctalk wrote: >> My biggest problem with heavy the stuff is stairs. > > So far, my algorithm has been: > > - field-strip the SOB; > - if still too heavy, fall back to n

Re: Oddball 7-track tapemark?

> On Oct 10, 2017, at 6:43 PM, Charles Anthony via cctalk > wrote: > > On Tue, Oct 10, 2017 at 3:29 PM, Chuck Guzis via cctalk < > cctalk@classiccmp.org> wrote: > >> Gang; >> >> I'm running some old (>50 years) 7 track tapes and I've come across an >> oddball tapemark. Instead of 17 octal w

Re: A Mystery

> On Oct 10, 2017, at 3:51 PM, allison via cctalk wrote: > > Memory says: it was MICROVAX/RT and the cpu had a reduced instruction set and > was used with > ELN/PASCAL. IT was a reduced capability machine. Microvaxen in general have reduced instruction sets, as specifically sanctioned by lat

Re: HP 7970 1/2" 9-Track Reel-to-Reel Tape Drive...

> On Oct 13, 2017, at 4:00 PM, Jack Harper via cctalk > wrote: > > > Greetings to the List - > > Does anyone have a copy of the text of the actual ISO 1863 standard that > defines, I think, the formatting of the ancient 1/2" magnetic tapes??? > > I am interested to understand better the for

Re: OT: the death of shortwave / Re: Hallicrafters S-85

> On Oct 20, 2017, at 11:03 AM, Al Kossow via cctalk > wrote: > > ... > Was looking at the digital repeater modes this morning > http://www.mikemyers.me/blog/2016/2/19/d-star-dmr-fusion-which-is-right-for-you > > Pretty disappointing that the most popular ones use proprietary comms > protocol

Re: Tape drive threading--right or left?

> On Oct 20, 2017, at 3:54 PM, Chuck Guzis via cctalk > wrote: > > I spent a lot of my early days threading CDC 60x and 65x tape drives. > There, the supply reel, as you face the drive, is on your right side and > takeup is on the left. It's easy to thread--I could thread up a drive > in 15 s

Re: First Internet message and ...

> On Nov 26, 2019, at 9:09 PM, TeoZ via cctalk wrote: > > Patents are generally used to document who invented what first. Commercial > success building on old research and patents tends to be what is remembered. "who invented what first" -- sort of. More precisely, who filed a patent appli

Re: First Internet message and ...

> On Nov 27, 2019, at 10:54 AM, Bill Gunshannon via cctalk > wrote: > > On 11/26/19 10:17 PM, Richard Pope via cctalk wrote: >> Chuck, >> I don't know anything about this system. I don't consider Minis and >> MainFrames to be Personal Computers. It must fit in a small room, run on >> a

Re: Scanning docs for bitsavers

> On Nov 27, 2019, at 2:56 PM, Jason T via cctalk wrote: > > On Wed, Nov 27, 2019 at 10:12 AM Christian Corti via cctalk > wrote: >> My recommendation: use a proper multi-function copier (the big copiers) >> that can also scan to network. I currently use our big Konica-Minolta >> bizhub 754.

Re: Scanning docs for bitsavers

> On Dec 2, 2019, at 11:12 PM, Grant Taylor via cctalk > wrote: > > On 12/2/19 9:06 PM, Grant Taylor via cctalk wrote: >> In my opinion, PDFs are the last place that computer usable data goes. >> Because getting anything out of a PDF as a data source is next to impossible. >> Sure, you, a hu

Re: Scanning docs for bitsavers

> On Dec 3, 2019, at 12:59 PM, Paul Berger via cctalk > wrote: > > ... > Would TIFF G4 still be preferable to JPEG2000? It would seem I can control > the compression used by selecting the pdf compatibility level. JPEG2000 apparently has a lossless mode (says Wikipedia). If so, it would be

Re: DECpc 425SE

> On Dec 4, 2019, at 5:46 PM, Antonio Carlini via cctalk > wrote: > > ... > The button cell looks very much like it is soldered in. It's approximately > 12mm in diameter. I've read numerous warnings not to go to near a button cell > with a soldering iron so I'm not really keen to do that, e

Re: DECpc 425SE

> On Dec 4, 2019, at 7:53 PM, Antonio Carlini via cctalk > wrote: > > On 05/12/2019 00:36, Adrian Graham via cctalk wrote: ... The button cell looks very much like it is soldered in. It's approximately 12mm in diameter. I've read numerous warnings not to go to near a button >

Re: First Internet message

> On Dec 26, 2019, at 12:23 PM, Fred Cisin via cctalk > wrote: > > And, a Happy Humbug to you, too! > Fleas Navy Dad and Yo new huevo!spellling? > > >> I^@^Ym not familiar with U.S. law but didn^@^Yt Xerox ^@^Xown^@^Y the >> patent(s) t$ technology? Again to my knowledge Microsoft and

Two dead LK201 keyboards

Gentlepeople, I'm doing some work with my Pro 380 over the holidays, but have run into a snag because both my LK201 keyboards are dead. They fail poweron self test -- LEDs stay on and no response to any keypresses. The odd thing is that the circuit board itself seems ok; I had a spare board t

Re: Two dead LK201 keyboards

> On Dec 27, 2019, at 1:46 PM, Peter Coghlan via cctalk > wrote: > > Paul Koning wrote: >> ... >> I'm considering building a PC keyboard LK201 emulation, should be a fairly >> simple bit of Arduino code. > > Supplies of good non-USB PC keyboards are probably beginning to get harder > to fin

Re: Two dead LK201 keyboards

t; > On Fri, Dec 27, 2019 at 9:56 AM Paul Koning via cctalk <mailto:cctalk@classiccmp.org>> wrote: > Gentlepeople, > > I'm doing some work with my Pro 380 over the holidays, but have run into a > snag because both my LK201 keyboards are dead. They fail poweron se

Re: Two dead LK201 keyboards

> On Dec 27, 2019, at 3:10 PM, Glen Slick via cctalk > wrote: > >>> Supplies of good non-USB PC keyboards are probably beginning to get harder >>> to find now too... >> >> True. It could use either kind of keyboard. Also, USB to mini-DIN adapters >> are still sold ($5 in the current L-Com

Re: Two dead LK201 keyboards

> On Dec 28, 2019, at 5:25 AM, Pete Turnbull via cctalk > wrote: > > On 28/12/2019 01:46, Paul Koning via cctalk wrote: > >> I can get one and test it with an Apple keyboard, but that doesn't sound >> right. There aren't enough wires on a USB connect

Re: DEC Rainbow / Pro video on VGA monitors?

> On Jan 19, 2019, at 4:38 PM, Paul Koning wrote: > >> On Jan 19, 2019, at 1:57 PM, Warner Losh via cctalk >> wrote: >> >> Greetings, >> >> I'm trying to find a way to get my DEC Rainbow's monochrome output onto a >> newer monitor than my aging VR201 (especially since I zapped something in

Re: Design flaw in the SCSI spec?

> On Jan 8, 2020, at 12:54 PM, Liam Proven via cctalk > wrote: > > With his express permission, I'm forwarding a mail from a public list. > I am interested in Gene's comments about the design of SCSI, but I > don't know enough electronics to judge. > > I thought others here might. > > I hav

Pro-380 power supply

I have a Pro-380 with an H7862-C power supply. Recently the power supply input filter (where the cord plugs in) shorted out, causing melted filter guts to leak out of the case and put a big smoke cloud in the room. Fortunately I have a spare, but it's an H7862 (not -C). I'm planning to replac

Re: IBM BSC CRC?

> On Jan 26, 2020, at 6:05 PM, Peter Coghlan via cctalk > wrote: > > Mattis Lind wrote: > >> >> Hello IBM BSC Experts! >> >> I am trying to figure out the CRC algorithm used by IBM BSC. I have tried a >> lot of different settings in crcreveng but not getting a match. >> > > I'm definatel

PC3XC manual?

My Pro has a PC3XC 4-line serial interface, and I know I once had a manual for it because the driver code I wrote mentions it. But I can't find it -- it may have been lost or it may have been a DEC document I did not take with me. Is there a PC3XC-BA programming manual anywhere? paul

Re: [Simh] Various

> On Feb 13, 2020, at 7:35 PM, Timothe Litt wrote: > > ... > Someone wrote a DECtape driver for VAX - I think Stan R., though it wasn't > supported. DECtape controllers are odd devices - the TD10 is reasonably > smart, but the others put realtime constraints on the drivers that could be >

Re: Sun external SMD cables

> On Feb 14, 2020, at 4:54 PM, jim stephens via cctalk > wrote: > > ... > The SCSI spec and cabling have a specific way that the conductors have to be > rolled to make a round cable. Each cable type has a recommended way that > signal and grounds should be paired and in what proximity in t

Re: HP 9000 Series 360 Thin LAN

> On Feb 21, 2020, at 1:47 PM, Cameron Kaiser via cctalk > wrote: > >> I am using an HP 9000 Series 360 with a "Thin LAN" coax card to run a >> piece of equipment. The LAN connection is not currently being used. I'm >> wondering if it's possible to connect it to a modern ethernet network?

Re: HP 9000 Series 360 Thin LAN

> On Feb 21, 2020, at 1:19 PM, Roger Addy via cctech > wrote: > > Hi All, > > I am using an HP 9000 Series 360 with a "Thin LAN" coax card to run a piece > of equipment. The LAN connection is not currently being used. I'm wondering > if it's possible to connect it to a modern ethernet net

Re: HP 9000 Series 360 Thin LAN

> On Feb 21, 2020, at 2:20 PM, Frank McConnell via cctalk > wrote: > > On Feb 21, 2020, at 10:19, Roger Addy via cctech wrote: >> I am using an HP 9000 Series 360 with a "Thin LAN" coax card to run a piece >> of equipment. The LAN connection is not currently being used. I'm wondering >> if

Re: G15 Drum Followup

> On Feb 27, 2020, at 3:39 PM, ben via cctalk wrote: > > On 2/27/2020 10:56 AM, Al Kossow via cctalk wrote: >> that is really sad >> I hope you sold them to Will > Why sad? Everybody had chance to say more, or ask to buy the whole drum. > Just what is the buy/sell policy on the list? Maybe I

Re: 52-pin D-Sub?

> On Feb 27, 2020, at 6:37 PM, Adam Thornton via cctalk > wrote: > > I work at an astronomy facility. I get to do some fun dumpster diving. > > I recently have pulled out of the trash a plugboard with a male and a > female D-Sub 52 connector. 3 rows of pins, 17-18-17. I took the > connect

Re: 52-pin D-Sub?

> On Feb 27, 2020, at 7:20 PM, Nigel Johnson via cctalk > wrote: > > If your reference to D-sub means the connectors originally made by > ITT-Cannon, I can offer the following from a cutout from a trade catalog that > I have carried around these last 30 years as ammunition against those who

Re: 52-pin D-Sub?

> On Feb 27, 2020, at 8:26 PM, Nigel Johnson via cctalk > wrote: > > More in the trivia department, the DA15 was used for AUI interconnection in > the 10base-5, -2, and early -T days, as well as analog joysticks. > > I'm surprised to see wikipedia saying that the high-density ones had DA to

Re: Mystery 1970 core board

> On Mar 4, 2020, at 10:46 AM, Bob Smith via cctalk > wrote: > > LEC16 was a copy of the PDP11. Lockheed sold it to BBN. BBN relabeled > it Pluribus. > I was part of the DEC engineering team looking at purchasing the LEC, > as one of the features was the ability to be an Arpanet IMP. > I was

Re: HPE OpenVMS Hobbyist license program is closing

> On Mar 10, 2020, at 3:38 PM, Ethan O'Toole via cctalk > wrote: > > > Since HP is killing the Hobbyist program, you all should make a Hobbyist > license key generator. > > That solves the issue forever. The difficulty is that people are looking for a solution that is legal. paul

Re: HPE OpenVMS Hobbyist license program is closing

> On Mar 11, 2020, at 11:08 AM, Al Kossow via cctalk > wrote: > > >> Years ago us SGI hobbyists were able to talk to SGI about this and a huge >> problem SGI had with any kind of hobbyist >> license for IRIX or turning it free is it's fully of licensed 3rd party >> stuff. But maybe now tha

Re: HPE OpenVMS Hobbyist license program is closing

> On Mar 11, 2020, at 5:24 PM, Fred Cisin via cctalk > wrote: > > On Wed, 11 Mar 2020, Al Kossow via cctalk wrote: >> Bob Supnik got Unisys to release the sources to BTOS while he was >> VP of engineering, but we've never been able to find a copy of them. >> They outsourced support to India,

Re: HPE OpenVMS Hobbyist license program is closing

> On Mar 11, 2020, at 6:05 PM, Antonio Carlini via cctalk > wrote: > > On 11/03/2020 21:30, Paul Koning via cctalk wrote: >> >> Sometimes we get lucky. Again, PLATO -- got permission to use it but the >> owner didn't have a copy. Fortunately, someone el

DDCMP over serial lines in RSTS V10.1

I thought that I had sent a message to the list a few months ago showing the procedure to use the software DDCMP driver in RSTS V10.1. That's a standard feature, but undocumented and probably unsupported. It works well and interoperates with PyDECnet and with the DDCMP implementation in SIMH.

Re: DIBOL and RPG for RSTS

> On Mar 27, 2020, at 6:12 PM, Bill Gunshannon via cctalk > wrote: > > Does anyone have a .tap image of a DIBOL install tape for RSTS? > > And while I am at it, was there ever RPG for RSTS? > > I am so bored I have decided to really load up a SIMH system > and just live in the past for a wh

Re: DIBOL and RPG for RSTS

> On Mar 27, 2020, at 8:42 PM, Bill Gunshannon via cctalk > wrote: > > On 3/27/20 8:25 PM, Paul Koning wrote: >>> On Mar 27, 2020, at 6:12 PM, Bill Gunshannon via cctalk >>> wrote: >>> >>> Does anyone have a .tap image of a DIBOL install tape for RSTS? >>> >>> And while I am at it, was th

Re: DIBOL and RPG for RSTS

> On Mar 28, 2020, at 2:55 PM, dwight via cctalk wrote: > > There are a few reasons most don't like Forth: > > 1. no type checking ( suppose to save dumb programmers ) > 2. Often, no floating point. ( Math has to be well thought out but when > done right in integer math it has few bugs

Re: H7874 power supply

> On Mar 29, 2020, at 2:14 PM, Robert Armstrong via cctech > wrote: > >> Maciej W. Rozycki wrote: >> numerous Chemi-Con SXF parts scattered across >> all boards, some leaking > > Yeah, mine is full of "Nippon Chemi-Con" electrolytic too. > > What about just gutting the PS chassis and

Re: H7874 power supply

> On Mar 30, 2020, at 10:17 AM, Robert Armstrong via cctalk > wrote: > >> Looks like for this enclosure an ATX supply could well work. >> For my VAX my notes say it didn't. > > A VAX would certainly be harder. You'd have to kludge up the ACOK and DCOK > signals for one thing, which I don'

Re: Split Ceramic Disk Capacitor

> On Mar 30, 2020, at 2:13 PM, Rob Jarratt via cctalk > wrote: > > > I have just opened up one of my other VLC machines. The part in question is > marked > > .0033M > Z5U > > I guess this means a 3.3nF capacitor? Or will it mean 3.3uF? > > Thanks > > Rob I'd say 3.3 nF. M is probably a

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