Re: Scanning docs for bitsavers

On Mon, 2 Dec 2019, Eric Smith wrote: There are newer bilevel encodings that are somewhat more efficient than G4 (ITU-T T.6), such as JBIG (T.82) and JBIG2 (T.88), but they are not as widely supported, and AFAIK JBIG2 is still patent encumbered. As a result, *NEVER* use JBIG2! I hope you know

Re: Scanning docs for bitsavers

On Wed, 27 Nov 2019, Paul Koning wrote: 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

Re: First Internet message and ...

On Tue, 26 Nov 2019, Richard Pope wrote: 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 120VAC 5Amp service, and not require 3 tons of AC to keep it cool to fit in to the Personal Computer

Re: Scanning docs for bitsavers

On Wed, 27 Nov 2019, mloe...@cpumagic.scol.pa.us wrote: On Wed, 27 Nov 2019, Noel Chiappa via cctalk wrote: That's what I use too; it has tons of useful features, including being able to drive my single-sided page-feed scanner and being able to number the even-sided pages correctly. The one I

SUN Diagnostic Executive

I'm encountering some strange and severe failures on our 4/260 and therefore I'm looking for a dump/tape image of the Sun-4 Diagnostic Executive. The manuals are online but not the tape, so I hope someone has made a dump. Thanks, Christian

Re: Philips mini computers

On Sun, 27 Oct 2019, nico de jong wrote: Then you could generate turnkey systems, where the "operating system" could be floppy or cassette (ECMA34) based, Turnkey systems typically controlled process equipment and the like, where operator intervention was very limited, normally limited to

Re: Philips mini computers

On Sat, 26 Oct 2019, nico de jong wrote: As for documentation I have the CPU (only) technical manual for the P850, the 2 volumes of schematics for the P851 and the preliminary manual (alas without the microcode source) for the P854. Some other schematics for things like the P854's PSU, the 4

Re: Philips mini computers

On Sat, 26 Oct 2019, jos wrote: On software side not much : a single cassette with Fortran & manuals. That is also the problem with our P856, I have a single-density FDC with floppy drives but no floppy based operating system. Christian

Re: Able document at VCF Midwest

On Sat, 5 Oct 2019, Noel Chiappa wrote: The thing is that documentation for Able products is hyper-rare; we only have those for the UNIVERTER and QNIVERTER, and some preliminary notes for the ENABLE. So if this can somehow be located... And what about the stuff on bitsavers? I personally have

Re: Course materials for MIT 6.031 (c. 1974) scanned

On Mon, 30 Sep 2019, ben wrote: A quick look, nothing is said about Algol, did you mean Assembler? what I see is interesting is that LISP is on a 11. I allways thought LISP only ran on BIGGER machines. I have the source and binary for KLISP-11 V2 on papertape; available on our FTP server.

Re: flux to imd

On Sat, 21 Sep 2019, Chuck Guzis wrote: On 9/21/19 10:26 AM, Al Kossow wrote: On 9/21/19 10:12 AM, Mark J. Blair wrote: Is it effective to bake cookies in their jackets? I don't know, since i've never baked floppies. Chuck would know. Yes, I do. Usual 58C temps that I use for tapes.

Re: Archiving information, was Re: ADM-3A question

On Fri, 16 Aug 2019, ben wrote: Well with me I have been finding with many searches, the modern browsers refuse to display sites for "what they figure is unsafe" yet the porn ads still show. I can find it, but not view it. I use current versions of Firefox and Chrome/Chromium, and I don't

Re: Scanner: was : Re: VAX DATATRIEVE orange binders (4)

On Fri, 16 Aug 2019, Al Kossow wrote: The scanning info is on the main bitsavers.org page I'm still using a Panasonic KV-S3065CW I checked the backlog of scanned VAX manuals, and it doesn't look like I have anything more scanned fore DATATRIEVE BTW do you still accept scanned documents

Re: Archiving information, was Re: ADM-3A question

On Thu, 15 Aug 2019, Noel Chiappa wrote: An additional issue, I think, is that Google is deprecating sites that use HTTP, versus HTTPS. I can't comment more, lest I start ranting at the utter Not true, in contrary, Google even crawls through FTP sites :-) Christian

Re: looking for a 7-track reel tape controller

On Wed, 7 Aug 2019, Michael Thompson wrote: can be connected to both 7-track and 9-track drives. The TU20 drive on the PDP-9 at the RICM is a 7-track drive. The only difference between the 7-track and 9-track versions of the TU20 is the tape head. All of the tape drive electronics is the same

Re: Scanning Results

On Mon, 22 Jul 2019, it was written Just give him time, he is only human after all ;-) I know :-) I think I should wait some more years (I found a mail from Feb. 2016, the last was from Aug. 2018) ;-)) Christian

Re: Scanning question (Is destruction of old tech docs a moral crime?)

On Sun, 21 Jul 2019, Warner Losh wrote: I just scanned my Rainbow 100 User's Manual at 300, 600 and 1200dpi using the scansnap default settings. You see a jump between 300 and 600, but little difference going on up to 1200 for this material. I posted the That tells me that you need to scan at

Re: Scanning Results

On Sun, 21 Jul 2019, Guy Dunphy wrote: http://www.bitsavers.org/bitkeepers is something else. The site's contact email is right down the bottom of the front page. Visual, to stop spambots. Also Al posts here in cctalk. Speaking of this, I suggest to rethink the method of submitting scans

Re: OT: the end of Dyn DNS

On Thu, 27 Jun 2019, da...@kdbarto.org wrote: From what I can determine the paid service will continue, it is the free service that is being stopped. Kinda sad really. I used to (until this The free service from dyndns.org had been stopped several years ago (somewhere between 2012 and 2014).

Re: Recovering the ROM of an IBM 5100 using OCR (among other things)

On Thu, 27 Jun 2019, Noel Chiappa wrote: > From: Liam Proven > This is *epic*. Indeed. I was blown away by the complexity of his technique for reading the digits. I can't believe there wasn't a much easier technique, though, e.g. using a logic analyzer and a small program to read

Re: 11/93 Rebuild

On Mon, 27 May 2019, Rod Smallwood wrote:   On an old XP box?  er neither will run My reply was meant as a hint. You should be able to find a dd-like tool for Windows yourself ;-) Either by using a old version of Cygwin (there are instructions how to find them), by installing a stand-alone

Re: 11/93 Rebuild

On Mon, 27 May 2019, Rod Smallwood wrote: In addition to the normal IDE drive it has an additional SCSI controller and drive   Using SIMH  I have created an image (RD54.dsk) containing a RSTS system. I am awaiting the final instructions as to how to copy the image to the SCSI

Re: Raised Floors

On Wed, 22 May 2019, Chuck Guzis wrote: So how are data centers cooled with water now? Does the water cool coldplates directly? Sort of, see for example the Rittal LCP system. I've had only a couple of instances where cooling water was used. In All current high-density rack systems need

Re: Pleas ID this IBM system....

On Tue, 21 May 2019, Patrick Finnegan wrote: Plumbing (unless you're doing aisle containment or RDHx) shouldn't run through the IT space in the data center. So how exactly do you attach a modern water cooled rack system to your cooling water system if not using plumbing? Cooling water to

Re: Pleas ID this IBM system....

On Tue, 21 May 2019, Grant Taylor wrote: On 5/21/19 2:13 AM, Christian Corti via cctalk wrote: You definitely need a raised floor for a data center. I think Google and their YAWNs will disagree with you on an actual /need/ for a raised floor in a data center. I'm not Google, I can't put my

Re: Pleas ID this IBM system....

On Mon, 20 May 2019, Patrick Finnegan wrote: I guess it would look right for the era, but I'd never build a data center with raised flooring after my experiences with them. It's such a pain to work with compared to a sealed concrete floor and overhead cable trays. My experience is that

Re: Pleas ID this IBM system....

First, congratulations from us :-) Reading your blog, I'm glad that we did not win the auction. We simply do not have the time and space (and money) to handle this, especially the effort needed to get everything out of the house. I and Klemens both have jobs that require us to do other things

Re: Network cards and Win98SE

On Mon, 13 May 2019, Grant Taylor wrote: "Gaming adapters" take a wired computer and connect it to a wireless network. That "adapter" has always been called a WLAN or wireless bridge. Christian

Re: ATEX PDP-11 For Sale in Houston

On Tue, 16 Apr 2019, Robert wrote: On Tue, Apr 16, 2019 at 7:48 PM Jon Elson via cctalk Wasn't the /34 all TTL? I'm pretty sure that my 11/34 is. That was a large part of its appeal to me. I should get back to it, when I have a minute... The OP first tried to sell the system on

Re: Pleas ID this IBM system....

On Tue, 16 Apr 2019, William Donzelli wrote: The 3125 would likely be near impossible to get running without a full set of docs. I think I could have access to the 3125 docs (MLM, CTM, ALD etc.). At least I know where they are. Christian

Re: Pleas ID this IBM system....

On Tue, 16 Apr 2019, William Donzelli wrote: Looks like it went for roughly $4k USD. Obviously logistics and storage cost play into things, but somebody got a deal. Dang. -C Assuming the innards of the machines were not all rust buckets - yes. I expected at least twice that, maybe triple.

Re: Pleas ID this IBM system....

On Tue, 16 Apr 2019, Christian Corti wrote: On Mon, 15 Apr 2019, it was written you guys bidding on it then? Yes, but only up to a certain limit. 3710 Euro... someone with definitely too much money for a system in unknown condition and local pickup only. So no, we did not get the system,

Re: Pleas ID this IBM system....

On Mon, 15 Apr 2019, it was written you guys bidding on it then? Yes, but only up to a certain limit. Christian On Mon, Apr 8, 2019 at 4:53 AM Christian Corti via cctalk < cctalk@classiccmp.org> wrote: On Sun, 7 Apr 2019, P Gebhardt wrote: wow! ...Hopefully some larger m

Re: Pleas ID this IBM system....

On Sun, 7 Apr 2019, P Gebhardt wrote: wow! ...Hopefully some larger museums or seriously envolved hobbyists within Germany can take care of this piece of history to save this nice piece of computer history. Hm, let's see if our museum can get that system - as long as the price stays

Re: Fujitsi 2444AC 9-track tape drive/PDP-11

On Thu, 21 Mar 2019, Jay Jaeger wrote: On 3/20/2019 9:56 AM, Jon Elson via cctalk wrote: On 03/19/2019 09:51 PM, W2HX via cctalk wrote: The pertec-to-SD project sounds very cool. Keep me in mind if you need testers/buyers. Yes, me too!  I still have a working 92185 (Keystone) drive, and

Re: HP 85 tapes

On Tue, 26 Feb 2019, Paul Berger wrote: Well a quick google and I found this http://vintagecomputers.site90.net/hp85/hp9915_eprom.htm it would seem that this was one of the tools used to build images of programs to burn into EPROMs for  9915 which is a version of the 85 designed to be used as

Re: HP 85 tapes

On Tue, 26 Feb 2019, Christian Corti wrote: And what about SECUREd files? I'm thinking of a binary program that ideally dumps the cartridge to e.g a single floppy disk file. I've done something similarly for the IBM 5110, but I'm no HP 85 expert at all. There's quite a large HP community, I

Re: BASIC for HP 1000, 21xx series

On Mon, 25 Feb 2019, Jay Jaeger wrote: The operating procedures for BASIC are likely to be as described in my pocket handbook: It's also described in the HP 2116 Operator's Guide: ftp://computermuseum.informatik.uni-stuttgart.de/hp/21xx/docs/02116-9057_OperatorsGuide_Dec1970.pdf Christian

Re: HP 85 tapes

On Mon, 25 Feb 2019, it was written The way I have been doing it is to copy the tape files to a LIF floppy disk file (real or just emulated with HPDRIVE), then archive that - either just the HPDRIVE file or a ImageDisk archive of the real disk. Recreating the tape is the inverse process of

HP 85 tapes

Hi, what is the recommended way to image HP 85 tape cartridges? The best would be including headers and whatsoever, and to be able to recreate tapes from the images and have a 1:1 duplicate from the original cartridge. I'm almost done with rebelting and imaging our 264x cartridges and would

Re: sun 88780 on ebay

On Mon, 28 Jan 2019, Al Kossow wrote: https://www.ebay.com/itm/132933407806 this is interesting because of the price and that all of the Sun drives I've ever come across had the 800bpi option in them I read HP Tape Drive 1/2" 1600/6250 1E on the label at the back. Christian

IBM 5100

Hello to all IBM 5100 owners, I have started disassembling and commenting the Executable ROS of the 5100 that a kind soul has exctracted and provided me with the dump. I've come across an inconsistency with the Maintenance Information Manual as found on the net. I have both SY31-0405-2 and

Re: Interest in a DiscFerret?

On Thu, 10 Jan 2019, Paul Berger wrote: One problem you may encounter reading LIF format diskettes on a PC using these tools is many LIF diskettes are formatted 256 bytes/sector and there is lots of PC diskette controller out there that cannot deal with that including *All* standard PC floppy

Re: warped RK05 pack -- lost cause?

On Wed, 9 Jan 2019, Fritz Mueller wrote: So, one of the things I have along with my 11/45 is an RK05 alignment cartridge. Unfortunately, its seems warped -- rides up an down a few millimeters in each direction as you turn it in an RK05 drive. :-( I don't think it's the platter but perhaps a

Re: Interest in a DiscFerret?

On Thu, 10 Jan 2019, Guy Dunphy wrote: * Also I have some old HP equipment that uses HP-format floppies. LIF? They're not DOS compatible. A HP 1630G logic analyzer with 9121 GPIB dual floppy drive, and a HP 8 data generator. For both machines I have old floppies containing critical

Re: PDP-11/45 RSTS/E boot problem

On Mon, 7 Jan 2019, Fritz Mueller wrote: It wasn?t clear to me last time I looked that I could build V6 to run off a single pack without having a second RK05 drive and pack available for swap? I have 2.9BSD on a single RK05 pack *with* a small swap space, it works very nicely. I have a 11/45

HP music [was: music dec tapes? (paper)]

On Thu, 3 Jan 2019, Bill Degnan wrote: I have tapes with labels [...] "Start 8 Music" (hand-written, no printed label) Speaking of PDP-8 music: there was also a music program for the HP 21xx computers. There are only absolute binary papertape images available. Does someone happen to have

Re: More old stuff incoming

On Wed, 19 Dec 2018, Peter Corlett wrote: For what it's worth, PCI-to-ISA adaptors exist. Virtualisation will let you Really? Show me one that is 1) in current production, 2) offers the full ISA bus (not just some decoded address lines and 8 data lines), 3) plugs into a PCI slot. Christian

Re: SunOS 2.4 Exploit

On Sun, 9 Dec 2018, Ken Seefried wrote: I believe SunOS 2.4 is old enough all you need to do is delete the password hash from /etc/passwd to log in without a password. Please tell me more: what is SunOS 2.4? I know of SunOS (1.x, 2.0, 3.x, 4.x) and Solaris (1.x and 2.x). Or do you mean Solaris

Re: Opening RL02 disk pack

On Fri, 7 Dec 2018, Noel Chiappa wrote: > From>: Christian Corti > I thought that the DEC packs would be similar but no, DEC had to invent > something different... Huh? I thought RL0x drives use an IBM 5440 type pack (as used on the IBM Yes, I mean the mechanism of the handle that

Re: Opening RL02 disk pack

On Thu, 6 Dec 2018, it was written I don't know that anyone did that back in the day - the pack cleaners I'm aware of had arms that wiped the top and bottom surfaces of the platter while the platter was still mounted inside the shell. I know Well I don't have an RL pack cleaner. And in my

Re: Opening RL02 disk pack

On Thu, 6 Dec 2018, Christian Corti wrote: Well, this is exactly my question: how do I remove the disk (= platter) from the pack (= cartridge). And there are no magnets in the disk pack. Here are some pictures that hopefully clarify my question:

Re: Opening RL02 disk pack

On Wed, 5 Dec 2018, Michael Fritsch wrote: The top of the middle part of the handle (this with the slider) is only glued slighly at the base part. With a screwdriver it is removeable quite easy. After removing it, it reveals the secret of the mechanism. [...] Before doing this, remove the

Re: Opening RL02 disk pack

On Thu, 6 Dec 2018, it was written Wait, by 'open' do you mean 'release the bottom dust cover', or 'disassemble and remove all plastic till the platters are fully exposed'? Of course I mean 'disassemble and remove all plastic till the platters are fully exposed'. I know how to remove the

Opening RL02 disk pack

Hi, how does one open a RL02 disk pack? A couple of packs need cleaning but I can't figure out how to open them... Christian

Re: George Keremedjiev

On Thu, 22 Nov 2018, Robert Feldman wrote: BTW, we went through this about 6 months ago. Someone pointed out the strange characters in Ed's posts. No change resulted from that, however, and I doubt this thread will cause any change. Yup, Ed is resistant to any form of advice. He could just

Re: Removing PVA from a CRT

On Tue, 20 Nov 2018, Michael Thompson wrote: the glass. We trimmed the Lexan to size, reassembled the Lexan and glass to the front of the CRT, and glued the steel mounting band in place. It looks great, and is probably a lot safer than just leaving the PVA out. You removed the steel band???

Re: DEC Alpha Bug Check Crash

On Mon, 12 Nov 2018, Douglas Taylor wrote: This is most likely correct.  I re-installed the OS on a different SD card/SCSI2SD device and got a successful graphics boot up.  Do SD cards drop bits or go bad? Yes, very easily. That is why I absolutely dislike solutions based on SD cards (or on

Re: PDP, Data General & more (TV show Maniac)

On Wed, 31 Oct 2018, Stéphane Tsacas wrote: TV show Maniac (available on netflix), S1E2 @28.48, at least a PDP 11/40, 11/05 or 04, RX01, PDP-8, and 2 Data General Eclipse, DEC doc binders, and maybe an IBM front panel and more. What is a PDP-8/1 XA ? Christian

Re: does a reverse-engineering EDA tool exist?

On Thu, 25 Oct 2018, Guy Dunphy wrote: Keep the objective in mind. What you want to end up with is a schematic, that is laid out in a way that aids comprehension of how the circuit works. Typically this means overall left to right functional or power flow, with separate functional blocks

Re: TK50, was: Re: [TUHS] Ultrix Tape: Block Size?

On Wed, 17 Oct 2018, Clem Cole wrote: As Paul W pointed out correctly, the TK50 and its children in the DLT* family all used a fixed format 512 byte *blocks on the tape*.This And that is wrong. The TK50 clearly uses variable block sizes. For example, have a look at a RSX11 or VMS tape:

Re: Identifying TO-3 w/HP house numbering

On Mon, 15 Oct 2018, Josh Dersch wrote: Got an HP 2382A terminal I'm attempting to resurrect. I get no video, no heater, no high voltage. What I believe to be the horizontal output transistor appears to be bad, but I'm not sure if this thing contains internal diodes that might be throwing off

Re: Ultrix Tape: Block Size?

On Tue, 16 Oct 2018, Warren Toomey wrote: All, I received this request from Matthew who isn't subscribed to either the TUHS or cctalk lists. He knows how to read the lists archives. Many thanks for any help you can provide. Cheers, Warren See

RE: Digico computer

On Wed, 10 Oct 2018, it was written Did you contact the guy with the drawings? Yes but I haven't heard back from him, yet. At least the mail hasn't bounced. Does anyone know the person who runs vintage-icl-computers.com ? There is no name, address or anything there, and I wonder if the site

RE: Digico computer

On Sat, 6 Oct 2018, Christian Corti wrote: I can make some pictures these days. So, here they are: http://computermuseum.informatik.uni-stuttgart.de/pics/digico Some notes from my part: There were two systems, there is only the front panel and board set left from the second one. One front

RE: Digico computer

On Fri, 5 Oct 2018, it was written http://www.vintage-icl-computers.com/icl49c Drawings for 16V here No, only some non-readable pictures of drawings :-( I should ask the guy to scan them reasonably. Christian

RE: Digico computer

On Fri, 5 Oct 2018, it was written I worked with DIGICO?s in 1974. Is it red? Does it have a manual pull through paper tape reader? Was it made in the UK? I am most interested Yes, it is red and has a small reader on the front plate. The machine seems to be complete (expect the disk drive

Digico computer

We recently got a Digico Micro 16V computer including a Pertec 3342 disk drive. It is a 16 bit minicomputer based on 74181 ALUs and a couple of 4k core memory modules. Since the condition of the system is not the best (dirt, dust, some bent wirewrap pins), I'm looking for the usual information

TK50Z (was: Rack-mount or tabletop version of DEC RX50 floppy drive?)

On Wed, 3 Oct 2018, Adrian Graham wrote: Here?s a pic of my RX50 and TK50. I?ve not tried to power them up for years. Speaking of TK50 and since I'm playing with them at the moment, is there any information on the SCSI command set for the TK50Z? My goal is to talk to one on a Linux system,

Re: Rayethon Computer AN/FYK9 CMI Store 33

On Mon, 24 Sep 2018, Chuck Guzis wrote: How about some 22-bit or 13 bit architectures? How about our Dietz MINCAL 523? 19 bit architecture, memory is 20 bits with parity. Microprogrammed machine, microcode within normal address space, mixed twos-complement and sign-magnitude arithmetic.

Re: Rayethon Computer AN/FYK9 CMI Store 33

On Mon, 24 Sep 2018, Al Kossow wrote: The only Raytheon I know of is Bob's 704 http://dvq.com/oldcomp/photos2/1k/704.jpg Aw, come on, you could know it better. We also have a 704 since many years, including software and documentation. You have mirrored my scans on bitsavers ;-) Christian

Re: SPACEWAR! Switch Boxes for a PDP-12

On Sun, 23 Sep 2018, Michael Thompson wrote: We modified the source from D.E. WREGE

Re: HP 9845A Computer

On Tue, 11 Sep 2018, Marlene Klein wrote: We have an HP 9845A computer (1977) in working condition. Can we post it on your site? That sounds illogical. How do you want to electronically post a physical object? ;-) And what site anyway? This is a mailing list. Christian

Re: VT100's

On Thu, 6 Sep 2018, Paul Koning wrote: The work of a VT100 is quite a lot more complex than that of a VT52 (many more screen operations, and more complex control sequence parsing). With the hardware technology available at the time, it was a pretty tough job. Does the VT100 have a

Re: Some late fifties HP measurement equipment available. ( Switzerland )

On Mon, 3 Sep 2018, jos wrote: HEWLETT PACKARD TIME INTERVAL UNIT 526B HEWLETT PACKARD ELECTRONIC COUNTER 524C HEWLETT PACKARD DIGITAL RECORDER 560A ( Possibly a second HP524(b) , unsure of this ) We have an HP 523CR, a real beauty. It has over 60 tubes! The LGP-30 has just twice as much.

Re: HP scope mailing list

On Sat, 18 Aug 2018, Curious Marc wrote: On Aug 17, 2018, at 3:14 PM, Toby Thain via cctalk wrote: On 2018-08-17 12:40 AM, Curious Marc via cctalk wrote: +1 on the hp_agilent Yahoo group Which at this very moment is MOVING to groups.io: https://groups.io/g/HP-Agilent-Keysight-equipment

RQDX3 formatter

Where do you patch the ZRQCH0 binary to use different geometries for non-DEC drives with a RQDX3? As it seems it should be possible, but noone has told how to do this ;-) Christian

Re: Troubleshooting HP 2116B

On Sat, 28 Jul 2018, GerardCJAT wrote: Christian, I absolutly agree with David s post. Back in the ' '70 when I was maintaining 3 x HP 2116 B running 24/24 7/7 FOR around 10 YEARS, the ONLY memory related problem that I got was traced to a faulty transistor !! Then I have a new fault ;-)

Troubleshooting HP 2116B

Ok, so I've got the computer almost running now. I now need to fix both sense amplifier cards. One (0..4k) sometimes reads a one for bit 3 after the machine has warmed up. The other (4..8k) has a stuck one for bit 7. Swapping these cards make the errors move to the other core bank respectively.

Re: R: HP-2116 front panel lamps

On Wed, 25 Jul 2018, it was written I've buy these lamps from Oshino Lamps, the original supplier for a good price. Minimun quantity 100 pcs Speaking of Oshino Lamps, I had a phone call yesterday with their German branch after I had inquired them for a distributor; I saw the OL-345 on their

Re: HP-2116 front panel lamps

On Wed, 25 Jul 2018, GerardCJAT wrote: When I was "doing sort of " C.E. for 2116 ( 1971 _ 1981 ), we were using CM 380 as replacement. Even longer life !! Good info! Don't know how I could miss this one, it is even cheaper than the 345. I think I wanted to stick to the same type as the ones

RE: HP-2116 front panel lamps

On Wed, 25 Jul 2018, it was written Christian, when I was restoring the HP Computer Museum's 2116A I ordered a bunch of these 345 bulbs from 1000bulbs.com - but it seems they no longer stock them. I did find this listing though which looks current...

HP-2116 front panel lamps

Hi, I need to replace several broken lamps from our HP-2116B front panel. The old/original ones are CM-345 or OL-345. This makes sense, they are rated 6V 40mA 1 hours. BUT: The maintenance manual says something different and is even wrong and inconsistent. HP part number is 2140-0035,

Re: SDL and SunOS

On Sat, 21 Jul 2018, carlos_muri...@ieee.org wrote: Under SunOS 4.1.4, the last gcc version that is supported is 3.3.6, but I haven't been able to build it on an IPX;  it gets to the point where it Not quite true: # uname -a SunOS azu 4.1.1 10 sun4 unknown unknown SunOS # gcc -v Reading

Re: zilog system 8000

On Wed, 18 Jul 2018, Al Kossow wrote: https://www.ebay.com/itm/292646012304 local pickup only the reserve is >$1500 ROTFL A very big and expensive door stopper without OS tapes. But most importantly: the CPU board is missing! The card in slot 2 appears to be an additional SIO card. This is

Re: 8 inch floppies, decaying

On Wed, 11 Jul 2018, Al Kossow wrote: On 7/11/18 2:21 AM, Christian Corti via cctalk wrote: I use Screen 99 for cleaning floppies MSDS https://store.comet.bg/download-file.php?id=16956 first ingredient listed; isopropyl alcohol Of course, somehow you need some "magic" in

Re: 8 inch floppies, decaying

On Wed, 11 Jul 2018, dwight wrote: I've had the goo from the adhesive of 5.25 inch 360k disk come through the nice liner and make gobs on the disk. I tried several thing but found that isopropanol worked without removing any of the magnetic material ( maybe s tiny amount that was likely loose

Re: MOS 6500/1 ROM archival service

On Tue, 3 Jul 2018, Jim Brain wrote: But, I have pulled my hacked reader out from mothballs to read a CPU someone is sending, so I thought I would inquire if others have 6500/1 units that want read. Hint: Seagate ST-225 Christian

Re: Preserved LGP-30

On Mon, 2 Jul 2018, "j...@cimmeri.com" wrote: Seriously! Liam, don't you know that handling paper with your hands transfers oils to it and hastens its decay? This is why gloves are worn to handle old paper artifacts. *lol* Especially with oiled paper tape that is exposed to daylight and

Re: IBM junk

On Wed, 27 Jun 2018, Donald wrote: The whole collection went to Computer Museum of America in Roswell, GA https://computermuseumofamerica.org/ Is that the museum that formerly was in San Diego? Christian

Re: VAX 4000 PSU (H7874) Schematics

On Thu, 7 Jun 2018, Aaron Jackson wrote: The VAX turns on and the status LED stays on F. The DC lamp does not illuminate on the PSU. 5V rail appears fine but there is nothing from the 12V rail. There were some *very* dodgy looking caps which I have replaced, and some *very* exploded MOSFETs,

Re: Whence 556?

On Tue, 5 Jun 2018, Chuck Guzis wrote: And we're talking bits/chars per inch, so I don't see the connection, particularly on a 75 ips drive. Ehm, yes, I was thinking too fast and too simple... it's a hot day here. Christian

Re: Whence 556?

On Sat, 2 Jun 2018, Chuck Guzis wrote: So 200 and 800 are nice decimal multiples of 10. But 556 doesn't fit that pattern--it's not a "nice' number, being the product of 4 and 139 and doesn't correspond to any computer-related characteristics that I know of. It's not metric. So why 556 and not

Re: Datasheet for Signetics spc16/10 ( Single chip Philips P800 processor ) ?

On Thu, 17 May 2018, jos wrote: ( this is not related to the General Automation SPC16 family) ... wherefore I still seek for print sets, software and so on ... Christian

Re: Unknown CDC unit , looks like a drum memory ?

On Wed, 16 May 2018, geneb wrote: On Wed, 16 May 2018, Ed Sharpe via cctalk wrote: OK  I  see there is a  mix  of  photos in this  directory! some  tape  reader  some  drum  2  separate  topics.   Ed, I don't know if you (or anyone else) can see this, but there's two junk characters at the

Re: Four Unibus boards from radiation dose measurement system.

On Mon, 19 Mar 2018, Mattis Lind wrote: Then there is some kind of serial com board with four UARTs on it. https://i.imgur.com/YvnTlxq.jpg That one is easy to name: That's an Able Quadrasync/E, I have that board, too. Christian

Re: EF50 was Re: radar history

On Mon, 5 Mar 2018, Christian Corti wrote: The EF50 has a Loctal base with eight pins. 5xx is Magnoval. 8x is Noval. Correction: Loctal with nine pins ;-) How crazy... Christian

Re: EF50 was Re: radar history

On Sun, 4 Mar 2018, Nico de Jong wrote: E = 6.3v filament F = Pentode 5x = B9G base .. also known as Noval base No, absolutely not ;-) The EF50 has a Loctal base with eight pins. 5xx is Magnoval. 8x is Noval. Christian

Re: Google, Wikipedia directly on ASCII terminal?

On Tue, 6 Feb 2018, Grant Taylor wrote: Watching Curious Marc's HP 264x Terminals - Part 3: Living the ASCII Life video made me think of this thread. Check out Marc's did video about 17 minutes into the video. The video shows Ken using the HP 264x terminal to run Lynx on a Linux box to

Re: Interest in Teac FD235J drives and FC-1 boards?

On Wed, 24 Jan 2018, Bill Gunshannon wrote: I wouldn't mind a couple of FC-1 but I bet the price would be much more than I can afford. Speaking of the FC-1 boards: it appears that they support different sector sizes, as well as MFM and FM encoding. How do you program this? Christian

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