Re: Computers that never crash (Was: Microsoft-Paul Allen)

On 10/23/18 9:32 AM, Alan Perry via cctalk wrote: > I have a RPi dedicated to a SIMH VAX-11/750 running BSD that I > intended to leave up and rack up some impressive uptime. Then I was > reminded by the local electricity provider that this isn’t the right > place to try that. We get clear day,

Re: source for smt probe clip

On 10/27/18 9:13 PM, Al Kossow via cctalk wrote: > > > On 10/27/18 7:37 PM, Eric Smith wrote: >> EZ-Hook XKM > > thanks! > > https://sigrok.org/wiki/Probe_comparison > > is a breakdown. they note that Salae used to ship EZ-Hook but now ship a > knock-off (no EZ-Hook name molded on) They

Re: source for smt probe clip

On 10/27/18 4:19 PM, Al Kossow via cctalk wrote: > Has anyone seen a source for these clips? > > http://bitsavers.org/mysteries/salea_clip.JPG > > They come with the Salae logic analyzer, and are like the HP logic analyzer > clips > in that the wire is detachable, instead of the common style

Re: AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

On 11/10/18 7:55 AM, dwight via cctalk wrote: > Typically, both the motor pulley and belt are changed as a set to keep the > distance from motor to flywheel the same. > In my younger days, a friend and I ground down a motor pulley, on a 50 Hz > Shugart 800, to be a 60 Hz. We used a file while

Re: AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

On 11/10/18 12:33 PM, Fred Cisin via cctalk wrote: >>> He needs a larger pulley if going from 60 to 50 ( as a motor pulley >>> ). It needs to be 20% bigger because the motor turns slower on 50 Hz. >>> 6/5 to be exact. > On Sat, 10 Nov 2018, Chuck Guzis vi

Re: AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

On 11/10/18 11:42 AM, dwight via cctalk wrote: > He needs a larger pulley if going from 60 to 50 ( as a motor pulley ). It > needs to be 20% bigger because the motor turns slower on 50 Hz. 6/5 to be > exact. > Dwight No argument there--but the size increment is pretty small. Consider that a

Re: Bill Godbout

On 11/12/18 1:39 PM, Fred Cisin via cctalk wrote: > Google has no mention.  Yet. > How can we confirm? Bill's family confirms and has set up a GoFundMe page for his wife and son: https://www.gofundme.com/godbouttuckcampfirerelieffund --Chuck

Re: desoldering (was Re: VAX 9440)

On 11/13/18 7:38 AM, Mark J. Blair via cctalk wrote: > Instead, I use two pencil-type irons, one in each hand, working under > a stereo microscope. The tips are much better, and manipulating each > tip independently provides great control of what's going on. Only > drawback is that if you want to

Sun doc: "Writing Device Drivers for the Sun Workstation"

I discovered this one (Document 800-1304-05, 19 September 1986 Still in shirnk-wrap, so pristine. I offered it to Al, but got no response. FFS USA --Chuck

Re: Anyone know where uPD2167 SRAMs appeared?

On 10/09/2018 05:13 PM, Ethan Dicks via cctalk wrote: > I asked a version of this question earlier this year. I have not been > able to find any vintage machines that used these 16Kx1 55ns SRAMs. > Anyone recognize them? Lots of them for sale on eBay. Probably few > buyers. One would want to

Re: BPK-72 or Bubble Memory Dummy Module + Seed Module

I disposed of a BPK-72 on eBay some years ago. I think it sold for $30. My recollection was that the thing was really power-hungry, particularly for something that stored only 128Kbits. --Chuck

Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?

On 10/05/2018 05:05 PM, Al Kossow via cctalk wrote: > > > On 10/5/18 4:21 PM, Chuck Guzis via cctalk wrote: > >> I seem to remember that there was a "combo" manual that covered the >> 51/52, 91/82 and 101/102. Also, there was a 52M, but I never >> encou

Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?

On 10/05/2018 05:42 PM, Fred Cisin via cctalk wrote: >> On 10/5/18 4:21 PM, Chuck Guzis via cctalk wrote: >>> I seem to remember that there was a "combo" manual that covered the >>> 51/52, 91/82 and 101/102.   Also, there was a 52M, but I never >>> enc

Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?

On 10/05/2018 04:04 PM, Bill Degnan via cctalk wrote: > The 91/92 is pretty rare compared to the 51/52. I bet one could glean > *most* of what one would need from the 51/52 manual, but not all. Could be > totally different too. The guy who contacted me I think wants to make his > 91 "into" a

Re: Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?

One last tidbit on the Micropolis floppy drives--the early drives (1014, etc.) used a body/chassis made of steel plate. The later drives (1115) used cast body parts. It's also worth observing that the leadscrew positioner is probably the best, as it's the dominant technology in 135 tpi 3.5"

Re: Milwaukee Computers MC-1200

On 09/03/2018 07:58 AM, Al Kossow via cctalk wrote: > One thing I noticed that made me nervous is looking at the code there is no > checksum on either the sector address or data fields on the floppy. I made an > image of a floppy that I bulk-erased and initialized this morning, and all you > see

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

On 09/20/2018 08:20 PM, Eric Smith via cctalk wrote: > Anyone have advice on making thermite? Ingredients, sources, proportions? > > The internet seems to think that just using aluminum powder with ferric > oxide is relatively hard to ignite, and that some manganese dioxide would > help with

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

Anyone headed for Hawaii? It'd be interesting to see what some molten lava would do to one... --Chuck

Re: Rayethon Computer AN/FYK9 CMI Store 33

On 09/24/2018 05:40 PM, Al Kossow via cctalk wrote: > The only Raytheon I know of is Bob's 704 > http://dvq.com/oldcomp/photos2/1k/704.jpg > These are all pretty boring--8-bit multiple word size, etc. How about some 22-bit or 13 bit architectures? --Chuck

Re: Rayethon Computer AN/FYK9 CMI Store 33

Hi Gerard, Yes, it's been there for some time. Al K. uploaded it upon my request. It turns out that my guesses about the architecture based on floppy disk data were correct! Thanks, Chuck On 09/25/2018 07:47 AM, GerardCJAT via cctech wrote: > @ Chuck, > > I know you know about the FST1

Re: ISO 70's and 80's coax and twinax terminal docs/brochures

I haven't heard any discussion about the Fujitsu coax terminals. I had a few, but scrapped them back in the mid 1980s. I saved a couple of the hermaphroditic twinaxial connectors from them, however. I don't recall seeing such connectors anywhere else. --Chuck

Re: Rayethon Computer AN/FYK9 CMI Store 33

On 09/25/2018 08:45 AM, Christian Corti via cctalk wrote: > 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

Re: WTD: 9 track open reel for PDP-11

On 12/27/18 10:32 AM, Glen Slick via cctalk wrote: > If you want something that can easily be shipped and moved around one > option is a Qualstar 1052. I wasn't impressed with the quality and > performance of those. I gave away the ones I had. They do 1600 (and > 3200), but not 6250. The 1260

Re: WTD: 9 track open reel for PDP-11

On 12/27/18 9:46 AM, Glen Slick via cctalk wrote: > On Thu, Dec 27, 2018 at 9:17 AM W2HX via cctalk wrote: >> >> I've been building up a nice little PDP-11/23+ with cabinets, RL02's etc. To >> really round things off, I'm looking for a open reel-to-reel style 9-track >> tape drive to add to the

Re: wanted back issues IEEE ANNALS OF THE HISTORY OF COMPUTING bound or unbound... dtop us a line off list please.

On 12/29/18 11:49 AM, Bill Degnan via cctalk wrote: > I just passed along three boxes of these to the VCFed collection. > Eventually I assume there will be a library to make these available onsite, > not sure. Stupid question, but doesn't IEEE CS already have these archived? (Yes, I know for

Re: CDC transistor boards

On 12/29/18 12:34 PM, William Donzelli wrote: > I think the Cyber 70s used the later modules (the multilayer and/or IC > things). Nope, the Cyber 70s were very minor upgrades to the 6000 series. A bunch of QSEs were made standard features, such as CMU (lower Cyber), CEJ, ILR, etc. Same

Re: Osborne-1 with prototype-based motherboard

On 12/29/18 12:53 PM, Brad H via cctalk wrote: > I've posted a blog about it here with a picture of the board for those > curious: http://bradhodge.ca/blog/?p=1186 If you can run down any of the old Sorcim crowd, say, Richard Frank or Marty Herbach, they might have saved some information. I

Re: wanted back issues IEEE ANNALS OF THE HISTORY OF COMPUTING bound or unbound... dtop us a line off list please.

I wish I would have known. I joined IEEE Annals at the beginning. I eventually dropped my subscription because I found that the inaccuracies would just make me mad. I threw out a bunch of ACM SIGPLAN notices (the local library didn't want them) from the 1978s. Still need to get rid of a pile

Re: CDC transistor boards

Were the brackets on the 1700 cordwood modules shorter than the 6000 series? I've got a switch module here in a desk drawer--it's a 3-position switch labeled A O C and is illuminated with a couple of reed relays on the PCB. PCB size is the same as 6000, as is the connector, but bracket is

Re: Microcode, which is a no-go for modern designs

On 1/2/19 10:44 AM, Guy Sotomayor Jr wrote: > Also, recall that there are different forms of micro-code: horizontal > and vertical. I think that IBM (in the S/360, S/370, S/390, z/Series) > uses the term micro-code for horizontal micro-code and millicode > for vertical microcode. On the CDC

Re: Microcode, which is a no-go for modern designs

On 1/2/19 8:02 AM, Jon Elson via cctalk wrote: > Random logic instruction decode was a REAL issue in about 1960 - 1965, > when computers were built with discrete transistors.  The IBM 7092, for > instance, had 55,000 transistors on 11,000 circuit boards.  I don't know > how much of that was

Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!)))

On 1/4/19 8:42 PM, Fred Cisin via cctalk wrote: > Would be  interesting when you find it. > Not necessarily "tiny" > Remember WATFOR?   (very impressive!) I guesss not too many numerical methods types hwere, but ELTRAN is a subroutine in the EISPACK linear programming set. Yes, it's all FORTRAN:

Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!)))

familiarity with ELTRAN and know where some documentation exists. --Chuck On 1/5/19 10:10 AM, Chuck Guzis via cctalk wrote: > Okay, I think I found the reference to it. > > It turns out that it was a high-school student's project entered in the > "Fourth Annual Computer Programming C

Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!)))

Okay, I think I found the reference to it. It turns out that it was a high-school student's project entered in the "Fourth Annual Computer Programming Contest for Grades 7 to 12'. To quote: "The 1966 winner was William J. Elliott, a 12th grade student at West High School in Minneapolis. His

Re: EmuVR & videogames & monitors...

On 1/17/19 10:04 AM, Tomasz Rola via cctalk wrote: > Monolith in a bedroom, anybody? Speaks of the generation, I guess--a bookcase with no books. --Chuck

Re: EmuVR & videogames & monitors...

On 1/17/19 12:57 PM, Tomasz Rola via cctalk wrote: > On Thu, Jan 17, 2019 at 11:29:54AM -0800, Chuck Guzis via cctalk wrote: >> On 1/17/19 10:04 AM, Tomasz Rola via cctalk wrote: >> >>> Monolith in a bedroom, anybody? >> >> Speaks of the generation, I guess-

Boxes ready to send, need address confirmation.

Hi Gene, I have two 35 lb. boxes of magazines ready to go; I just need address confirmation. Thanks, Chuck

Re: Boxes ready to send, need address confirmation.

Oops, please ignore, wasn't supposed to go to the list. --Chuck

Re: Core memory emulator using non volatile ram.

On 12/17/18 9:51 AM, Guy Sotomayor Jr wrote: > Except it is *much* more expensive than MRAM. 32x8 NVSRAM is $18.50 in qty 1 > from Digikey. > A 64Kx16 MRAM is $11.84 in qty 1 from Digikey. MRAM requires no additional > circuitry so that > also reduces the overall cost (and has unlimited write

Re: Data Electronics Incorporated (DEI) CMTD-300S2 tape drive manual

I've got a 3M DCD drive that's very similar--fixed multi-track head. I've never seen a practical use for it, however, given the terribleness of old QIC carts. DEI also re-packaged the Exabyte 8mm transports in their own enclosures with their own LCD readouts. I've got one such drive here.

Re: Core memory emulator using non volatile ram.

On 12/15/18 1:30 PM, Warner Losh via cctalk wrote: > True. Lessening the pain still doesn't make it right :). MRAM or FRAM does > sound a lot simpler to use... How about nvRAM? Faster, with high capacity. Stores into flash (every CMOS RAM cell is paired with a flash cell) when the supply

Re: ◾NSC 8477 Was: New takes on XT-IDE, a new FDC, and a new CM/S GAL

On 12/19/18 10:40 PM, Ali via cctalk wrote: >> No, the CCIV initially had a plain-jane Intel rev 0 82077AA in a 68 pin >> PLCC. After Intel "improved" the chip to the 82077AA-1, FM ceased to >> work. Fortunately, as I mentioned NSC 8477 is a plug-in replacement, >> with the exception of not

Re: Origin of 'Straight 8' name

On 12/21/18 11:32 AM, allison via cctech wrote: > And the automotive reference was not it.  It was the straight as in not > later lettered > versions.  Best similar use is:  Whiskey straight, water on the side. Could be--but I was pointed out that "straight eight" was an automotive term familiar

Re: OCR old software listing.

On 12/26/18 3:17 PM, Al Kossow via cctalk wrote: > > > On 12/26/18 2:55 PM, Steve Malikoff via cctalk wrote: > >> Scan them all as-is, put them up and 'crowd source' this list > > And TYPE the programs in again I've found that it's often the best course of action and consumes the least time

DG Nova 4 for pickup on Lon Gisland

Cribbed from VCF: https://www.ebay.com/itm/Data-General-NOVA4-Nova-4-nova-desktop-computer-minicomputer-8-floppy-vintage/332940164292?hash=item4d84c7bcc4:g:2skAAOSwqIhcDrmI:rk:39:razz:f:0 Chuck

Re: Core memory emulator using non volatile ram.

On 12/16/18 11:21 AM, Paul Koning wrote: > If you simply want non-volatile memory, the obvious answer is SRAM with > battery backup and a small FPGA to do the interfacing. I proposed nvRAM - CMOS SRAM backed by cell-for-cell flash. Loads SRAM from flash on power-up and stores into flash at

Re: wanted any and all XSCRIBE closed caption related and steno typer key board related ... docs... parts.. units building up an working analog CC demo chain for display in our Deaf and Hard of Hearin

On 12/23/18 5:52 PM, ED SHARPE via cctalk wrote: > wanted any and all XSCRIBE closed caption related and steno typer key board > related ... docs... parts.. units building up an working analog CC demo > chain for display in our Deaf and Hard of Hearing assisting tech area. will > consider

Re: Core memory emulator using non volatile ram.

On 12/15/18 10:01 AM, Guy Sotomayor Jr via cctalk wrote: > FRAM or MRAM. I make extensive use of them in my projects. > > Everspin has a few (all SMT and 3.3v). As I recall they run ~$20/ea for 4Mb > (512K x 8 or 256K x 16). As neither MRAM nor FRAM requires a write-after-read refresh, I fail

Re: Origin of 'Straight 8' name

Back in the first half the 20th century, there were various configurations of 8-cylinder internal combustion engines. We're all familiar with the V-8, but there were inline 8-cylinder designs used primarily on luxury cars, making for a wonderfully long engine compartment. Cord, Buick, Packard,

Re: More old stuff incoming

On 12/19/18 11:59 AM, Toby Thain via cctalk wrote: > On 2018-12-19 2:33 PM, Bill Gunshannon via cctalk wrote: >> >> when will someone be coming out with another sound card with a >> vacuum tube on it? >> >> bill >> > > Hm, I do have some 12AX7's lying around... Well, there have been PC

Re: 34 pin Card Edge “Male to Male” Connector

On 11/28/18 5:13 PM, Paul Koning via cctalk wrote: > > >> On Nov 28, 2018, at 8:01 PM, William Sudbrink via cctalk >> wrote: >> >> I'm not sure you're quite getting it... they say a picture is worth a >> thousand words: >> >> http://wsudbrink.dyndns.org:8080/images/20181128_194316.jpg >> >>

Re: CDC floppy disks on Ebay.

On 12/9/18 3:30 PM, Guy Dunphy via cctalk wrote: > FWIW, years ago a friend of mine found some important floppies of his had all > developped mold on the magnetic surfaces. Which fouled read heads, making them > useless. We found that slitting open the covers, taking out the disks and > literally

Re: TCL Terminal

Don't know the exact product, but TCL INc. was in Fremont, CA and was a maker of various bits of LAN gear. --Chuck

Re: TCL Terminal

On 11/25/18 9:55 AM, Al Kossow via cctalk wrote: > 'TCL' are the initials of the person who created the first Ethernet > transceiver (Tat Lam). > > > https://books.google.com/books?id=ooBqdIXIqbwC=PA73=PA73 I note that the same section mentions Jim Theornton. I recall on a trip to CDC ARHOPS

Re: Text encoding Babel. Was Re: George Keremedjiev

On 11/25/18 2:53 PM, Liam Proven via cctalk wrote: > On Sun, 25 Nov 2018 at 23:42, Grant Taylor via cctalk > wrote: > >> I bet you see all sorts of things that I'm ignorant of. > > It's been enlightening! I routinely get Turkish and Greek spam in my mailbox--and I've gotten Cyrillic-alphabet

Re: Text encoding Babel. Was Re: George Keremedjiev

On 11/27/18 6:23 PM, Fred Cisin via cctalk wrote: > I love the use of an arrow for assignment.  In teaching, a student's > FIRST encounter with programming can be daunting.  Use of an equal sign > immediately runs up against the long in-grained concept of commutative > equality.  You would be

Re: FixMeStick

On 11/26/18 9:57 PM, ED MAJDEN via cctalk wrote: > > Hello group: > Has anyone used a FixMeStick to fix computer issues like virus problems > and key tracking hacking? Does it really fix such problems or create new > ones? > Thanx for any comments that are posted. > Ed A friend loaned

Re: Bogus "account hacked" message

On 1/8/19 12:20 PM, Kevin Lee via cctalk wrote: > Delete it don’t respond and ignore it.. been getting them too.. change your > password > If your that concerned.. it’s a fishing trip.. Yeah, I get the one occasionally that claims to have compromising video taken with my PC's webcam. Except,

Re: OT? Upper limits of FSB

On 1/8/19 1:23 PM, Tapley, Mark via cctalk wrote: > Why so (why surprising, I mean)? Understood an unrolled loop executes > faster... That can't always be true, can it? I'm thinking of an architecture where the instruction cache is slow to fill and multiple overlapping operations are involved

Re: Teaching Approximations (was Re: Microcode, which is a no-go for

On 1/8/19 1:31 PM, Fred Cisin via cctalk wrote: > > I first encountered it about 60 years ago, in fifth grade.  Our textbook > said, "PI is about 3.1416 or 22/7."  Our teacher insisted that that > sentence meant "PI is about 3.1416, or exactly 22/7."  I argued it.  I > pointed out that 22/7 was

Re: Teaching Approximations (was Re: Microcode, which is a no-go for

On 1/8/19 3:04 PM, Fred Cisin via cctalk wrote: > But, using a crude code of 'A' = 1, 'B' = 2, 'C' = 3, etc. > "ELGAR" appears in PI at decimal digits 7608455 I suspect that Pi, to a sufficient number of places could decode anyone's surname. No, I'm thinking of "Nimrod"... --Chuck

Re: Anyone want an irman (Infrared to serial dongles)

On 1/8/19 8:18 PM, ED SHARPE via cctalk wrote: > > Chuck we would like a couple..  ed at smecc For the keyboards, my source is Electronics Goldmine (https://www.goldmine-elec-products.com/) for the keyboards. Usually $10 each, but go on sale every now and then for $5. "Blue Pills" can be

Re: Bogus "account hacked" message

On 1/8/19 9:15 PM, Fred Cisin via cctalk wrote: > > "Windows Technical Department" > "Windows Company"  !!?! > I used to get one of those calls every few days, but I'm using a screening service, so I haven't gotten one in months. Too bad! I used to have a lot of fun playing dumb. "Vindows"

Re: Anyone want an irman (Infrared to serial dongles)

On 1/8/19 3:05 PM, David Brownlee via cctalk wrote: > While tidying up I've found a few Irman infrared to serial dongles > > https://web.archive.org/web/20060314052558/http://www.evation.com/irman/index.html > > they connect via a 9 pin serial plug and then convert any consumer > remote IR

Re: Interest in a DiscFerret?

On 1/10/19 5:16 PM, Chris Pye via cctalk wrote: > There is a 13 sector version of ADTPro. All you need is a working > Apple II or IIe with a floppy drive and serial card (or ethernet > card). It can even bootstrap the Apple into 13 sector DOS 3.2 mode > and then you can read and transfer disk

Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!)))

On 1/13/19 11:47 AM, Sean Conner via cctalk wrote: > Yup. He did it intentionally because, as he said, most of his friends > were hard of seeing, and by using ALL CAPS the letters were bigger and thus, > easier to read. But the new Chromebook removed the CAPSLOCK key. > > The fact that

Re: CDC transistor boards

On 12/29/18 10:47 AM, William Donzelli via cctalk wrote: > Statistically, it is more likely to be a 1700 module (a more common > machine). The front bracket is missing, which is the easy way to > distinguish the two types. That's an interesting observation, but I'm not sure I'd agree with you.

Re: CDC transistor boards

On 12/29/18 10:47 AM, William Donzelli via cctalk wrote: > Statistically, it is more likely to be a 1700 module (a more common > machine). The front bracket is missing, which is the easy way to > distinguish the two types. Don't know what the 1700 count was, but each 6600 had about 6,000

Re: WTD: 9 track open reel for PDP-11

On 12/28/18 10:46 AM, Douglas Taylor via cctalk wrote: > I have a Qualstar 1260 (Pertec Interface) and connected it to a > PDP-11/23 with an Emulex TC02.  It was fun to see it spin the tape and > read/write data.  I could just imagine what torture it was to collect > data or install operating

Re: WTD: 9 track open reel for PDP-11

On 12/28/18 2:57 PM, Fred Cisin via cctalk wrote: > But, not quite as much bandwidth as a station wagon full of tapes > hurtling down the highway. I once rode on an USAF general's jet with a load of 844 packs. That probably was pretty good bandwidth for the time... One thing that escapes many

Re: CDC transistor boards

On 12/28/18 12:42 PM, Peter Van Peborgh via cctech wrote: > Gentlemen of advanced years who can remember CDC, cradle of Cray. > > Can you tell me which CDC computer type these three boards belonged to? It > is for labeling purposes in my personal museum. > > https://postimg.cc/crJHv3Lt >

Re: Teaching Approximations (was Re: Microcode, which is a no-go for

For those musically uninitiated, my reference to Elgar was the interesting discovery by an amateur musician that the "enigma" of the "Nimrod" variation, which has been debated by musicologists for the last century or so, is very likely pi. Consider that by assigning a number to the degrees of the

Re: Teaching Approximations (was Re: Microcode, which is a no-go for

On 1/9/19 9:36 AM, Douglas Taylor via cctalk wrote: > I always wondered how do people know that those computed digits of pi, > out to millions and millions of digits, are correct? > > Do different algorithms or methods give the same answer? That's basically the idea. For example, you can

Re: Unknown US manufacturer - try again

I suspect that it's from a trainer of some sort. Stewart-Warner quad 2-input NAND DTL stuff. So probably not RCA. --Chuck

Re: cctalk Digest, Vol 48, Issue 17

On 09/17/2018 12:11 PM, Jeffrey S. Worley via cctalk wrote: > I recall the SAGE was an integrated system of control for Interceptors. > It began in the 1950's and became fully operational with the > F106 fighter interceptor aircraft. It could control an entire > intercept from wheels up

Re: Beehive terminals

On 09/11/2018 02:35 AM, Jeffrey H. Johnson via cctalk wrote: > The Beehive ATL-008 (ANSI/VT102 terminal) might be an obscure > terminal today, but it holds a special place in my heart as the first > hardware terminal I used extensively, and was advanced (for 1982), > supporting user programming in

Re: New takes on XT-IDE, a new FDC, and a new CM/S GAL WAS: RE: More old stuff incoming

On 12/19/18 12:10 PM, systems_glitch via cctalk wrote: > The controller chip used on that FDC is the same as found on some Adaptec > AHA-15xx series cards, which have been the go-to for a long time on adding > FM support to PCs whose onboard controllers don't support it. I don't think that's

Re: More old stuff incoming

On 12/19/18 7:41 AM, Ethan via cctalk wrote: >> 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 > > Surprised no one has used something like an ATMega or cheap USB

Re: NSC 8477 Was: New takes on XT-IDE, a new FDC, and a new CM/S GAL

On 12/19/18 5:38 PM, Ali via cctalk wrote: >> Micro Solutions initially shipped the CompatiCard IV with the Intel >> chip--and it worked well. Intel then revised the chip as the 82077AA-1 >> to add tape support and broke the FM capability. When I inquired about >> this to Intel, I got the

Re: More old stuff incoming

On 12/19/18 7:32 PM, Ali via cctalk wrote: >> I don't know how functional their solutions are and I've never had any >> of >> their products nor I have anything to do with them, but I've had this >> link: in my bookmarks just in case since >> 2005. >> I guess if they

Re: MV II help

On 4/2/19 9:44 AM, Bill Gunshannon via cctalk wrote: > A number of choices for OS. OpenBSD or NetBSD should still work > depending on the actual configuration of the system and VMS still > has a hobbyist license. PDP11s were used in various places around the USAF. I duplicated a bunch of RX50

Re: MV II help

On 4/2/19 12:44 PM, Bill Gunshannon via cctalk wrote: > Ummm... That's MV II or MicroVAX-II, not PDP-11. > > Of course, I do have PDP-11's running here but no C-130's parked > around the place. Was impressed with the improvements in the J > model in 2009, however. :-) Could be--I generally

Re: Burroughs BU4400 tape drive. What is it?

On 4/2/19 3:04 PM, mike--- via cctalk wrote: > Looks like you're right! I'm pretty sure it's a cleaner. Everything on > it seems to work well, once I figured out how it was intended to work. > Just had fool the tape optical sensor (BOT/EOT?) with a piece of paper > and it started up fine. It only

Re: Burroughs BU4400 tape drive. What is it?

On 4/2/19 7:23 PM, mike--- via cctalk wrote: > The shipping guess was damn close - $97.94 (approx. NZD143.54), plus > US$10 for the actual tapes. It actually sounds like quite a good deal, > for brand new tapes. Thanks for the offer of the tape, if I get stuck > I'll drop you a note. It's $60

Re: AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

On 3/27/19 1:36 PM, dwight via cctalk wrote: > Most all 8 inch drives were synchronous capacitive phased AC motors. That is > until 3 phase low voltage motors started showing up on 5.25 disk drives. > The ac motors on the 8 inch drives rarely had jumper options for 120/240V AC. > Most were fixed

Re: George Comstock

On 3/26/19 8:53 AM, Al Kossow via cctalk wrote: > https://www.almanacnews.com/news/2019/03/25/george-comstock-silicon-valley-pioneer-and-portola-valley-civic-leader-dies Thanks for that--I remember George well. --Chuck

Re: Refillable spray can

On 3/24/19 2:34 AM, Steven M Jones via cctalk wrote: >> Looks like a great idea but the reviews say otherwise. Dangerous even. > >> How about a cheap airbrush kit? > > Reminds me of something I picked up years back, and haven't seen another > of - a rechargeable compressed air sprayer. Works

Re: Refillable spray can

On 3/24/19 11:32 AM, Chuck Guzis via cctalk wrote: > So this? > > https://www.amazon.com/EWK-Aluminum-Pneumatic-Refillable-Compressed/dp/B00JKED4MS > > Just be sure to use a dryer on your compressor output. Compressed air > can hold a lot of moisture. I'll also add that at

Re: Refillable spray can

alf dozen at Fry's or >>> Microcenter, complete with the plastic straw to direct the air. But this >>> one had a bicycle pump valve on the bottom so you could refill it as >>> needed. > > On Sun, 24 Mar 2019, Chuck Guzis via cctalk wrote: >> Isn't that what Fred

Storage for 1/2" open reel tape

I've noted earlier that the vinyl "hanger strips" for 1/2" magnetic tape have been degrading, becoming brittle and simply breaking away, sometimes in small particles. So I set off looking for a low-cost substitute--any hangers that I could rustle up would probably be on their last legs at this

Re: Storage for 1/2" open reel tape

On 4/5/19 5:31 PM, Paul Koning via cctalk wrote: > If this works, which is most of the time, it's a great time saver. As an > operator you just hang the reel on the spindle, hit "load" and walk away to > the next task. > > I think IBM may have originated this magic; several of the later DEC

Re: Storage for 1/2" open reel tape

On 4/5/19 2:58 PM, Grant Taylor via cctalk wrote: > On 4/5/19 3:20 PM, Chuck Guzis via cctalk wrote: >> See how each reel of tape hangs from a slot in a horizontal bar? Those >> white-and-black strips wrapped around the tapes are what I'm referring >> to as being deteri

Re: Storage for 1/2" open reel tape

On 4/5/19 1:49 PM, Ali via cctalk wrote: >> I hit on the idea of using 16mm move film plastic "cans". Much to my >> surprise, I found that there is still an active market for these >> things. > > Chuck, > > For the uneducated amongst us exactly what are you referring to? Are you > talking

Re: Storage for 1/2" open reel tape

On 4/5/19 4:15 PM, Grant Taylor via cctalk wrote: > ACK > > I'm getting the mental impression that it's somewhat like a spring form > pan.  The latch opens and releases tension off of the strip that goes > around the tape reel.  When it's latched, it cinches against it.  When > it's unlatched,

Re: Storage for 1/2" open reel tape

On 4/5/19 6:13 PM, Al Kossow via cctalk wrote: > I had to re-thread the UNISERVO that is on display at CHM. I have to try > to find my pictures that I took. > > http://bitsavers.org/pdf/univac/magtape/PX899_Mechanical_Parts_of_UNISERVO_Apr58.pdf > > show it. > My guess on the vintage of these

Re: Storage for 1/2" open reel tape

This is what the end of a short 6" Univac leader looks like: https://i.imgur.com/wPH93Cz.jpg Apologies for the poor quality, but even with the naked eye, it's hard to see that the leader end is "looped" I might be able to enhance this a bit with some image finagling, if anyone's interested.

Re: AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

On 3/27/19 4:06 PM, dwight wrote: > A friend an I did almost the same thing. We used the transformer primary > from another box as an auto transformer and used a file to grind the > motor pulley down. We did have to file the mounting slots some as well. > It worked fine. > This was about 25 years

Re: Pleas ID this IBM system....

On 4/6/19 11:09 AM, Al Kossow via cctalk wrote: > Hopefully LCM can go after this to flesh out their peripherals > It looks like a nice set of disks and tapes, hopefully the 360-era > disk and tape channel controllers are there too > > On 4/6/19 7:04 AM, jos via cctalk wrote: > >>

1/2" tape storage.

Argh! I just got a batch of 10.5" open-reel tape in and about one-third of the batch has vinyl "hanger strips" that heave either self-destructed in shipment or are about to do so. Given that the durned things have lapsed into the land of the unobtainium, I wonder if plastic (probably

Re: Kemners Surplus - Real time walkthrough

On 2/18/19 2:31 PM, TeoZ wrote: > I passed on mint complete word processors at a recyclers ages ago > because I had no use for them. I almost picked up a huge IBM typewriter > but changed my mind. > Everybody has limited space so we try not to fill it with things way > outside of our normal

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