Re: Anyone have spare DipStik sockets?

On 2/23/19 10:18 AM, Carl Claunch via cctech wrote: > In the early 1970s a socket to hold multiple DIP chips was being sold under > the brand name DipStik. Up to six chips were inserted in a trough in the > socket, a top screwed on with thumbscrews on the ends. It had solder lugs > on the top and

Re: Ultimate FDC? (Was: IBM 6360 - Filesystem(ish) info?

On 2/20/19 3:40 PM, Warner Losh wrote: > The RX50's are MFM encoded. There's no FM anything on it, unless it's > that way on all MFM diskettes. > > Other DEC diskettes may have done this, but RX50's are just higher track > density, but old pre IBM-AT data encoding rate diskettes. > > At least

Re: Tape reading question

On 3/11/19 5:51 PM, Dennis Boone via cctalk wrote: > > I just double-checked and the drive pinouts match the DEI CMTD-3400 manual > > I know, it isn't obvious at all from the maint manual.. > > Was this thing referred to as a "Funnel"? Maybe that was a Prime > specific name though. > My

Re: Tape reading question

On 3/11/19 5:51 PM, Dennis Boone via cctalk wrote: > > I just double-checked and the drive pinouts match the DEI CMTD-3400 manual > > I know, it isn't obvious at all from the maint manual.. > > Was this thing referred to as a "Funnel"? Maybe that was a Prime > specific name though. No, that

Re: Pioneers of computing

On 3/12/19 5:59 PM, ben via cctalk wrote: > That needed to say Half Word. The point I was making was you went > down from 36 bits to 32 bits and that loss of word size made > everything follow a similar architecture model between different > computer manufactures as there is only a few ways to

Re: Pioneers of computing

On 3/12/19 5:23 PM, Paul Koning via cctalk wrote: > > >> On Mar 12, 2019, at 5:51 PM, Murray McCullough via cctalk >> wrote: >> >> ... I’ve written in my book on the History of the Microcomputer a >> history of the processing chip as the timeline follows an >> approximation of: >> >> Late

Re: Pioneers of computing

On 3/13/19 7:10 AM, William Donzelli via cctalk wrote: > Be careful handing out the praise. The idea of adding a external > signals and biases to crystal detectors was an old trick from the > 1920s. No one really knew what was going on, and no one really used > this technology, simply because

Re: SCSI2SD: Is it worth a try?

FWIW, there are a couple of Addonics AEC7722 adapters (SCSI-to-IDE) selling for $50-70 on eBay. Don't know a thing about them, though. --Chuck

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

On 3/19/19 8:26 AM, Jon Elson via cctalk wrote: > On 03/18/2019 10:35 PM, W2HX via cctalk wrote: >> 4.  Anyone ever make a pertec to USB project? Might be interesting >> to get access to old tapes on more modern computers? >> >> > I have some CDC (Laser Magnetic Storage) 92185 drives (known as

Re: Tape reading question

On 3/11/19 10:32 AM, Al Kossow via cctalk wrote: > If you open it up, it should have a DEI tape drive in it, which predates QIC > The data coming off the tape is NRZ instead of GCR > > I just double-checked and the drive pinouts match the DEI CMTD-3400 manual > I know, it isn't obvious at all

Re: Tape reading question

On 3/11/19 3:45 PM, Chuck Guzis via cctalk wrote: > I use 4mm ID silicone vacuum hose. Works well and requires no > adhesive--just stretch it over the bare hub. e.g. Something like ebay item 132808966973 I use the red stuff, but it comes in a variety of colors. I re-did the PVC vacuum

Re: What 6502 macro assembler was used for the AIM-65 Monitor ROM?

At the expense of being boo-ed for this, could the original Rockwell stuff perhaps have been assembled using a mainframe/mini-hosted cross-assembler? I'm aware of several situations where this was the case. --Chuck

Re: What 6502 macro assembler was used for the AIM-65 Monitor ROM?

On 3/22/19 10:28 AM, Glen Slick via cctalk wrote: > On Fri, Mar 22, 2019 at 9:59 AM Chuck Guzis via cctalk > wrote: >> >> At the expense of being boo-ed for this, could the original Rockwell >> stuff perhaps have been assembled using a mainframe/mini-hosted >> cr

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/7/19 9:16 AM, Jack Harper via cctalk wrote: > I mounted the two HP7970 Drives in a non-HP rack - just a standard > six-foot 19" rack that I found a few years ago. > > I installed two heavy aluminum rails (1/8" thick and perhaps 2" on the > two sides - angle stock) for each Drive to support

Re: Tight clearance bit holder

On 2/7/19 2:01 PM, Fred Cisin via cctalk wrote: > On Wed, 6 Feb 2019, Chuck Guzis via cctalk wrote: >> Ratchet right-angle screwdrivers are also an option, as are ball-end >> allen wrenches or offset-head screwdrivers.  None are particularly dear. > > After half a century of

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/6/19 10:09 AM, Jay West wrote: > I have not looked at my 7970's in quite some time, but I had thought the > previous discussion was for mounting the 7970's in an HP rack. Not all later > HP racks, but the 2 or 3 series that were predominant around the time of the > 7970's, had a very

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/6/19 11:25 AM, Jay West wrote: > Yes, it's all "standard 19 inch" but. the HP gear and mounting > kits of that time expected certain things to be present in the rack > design/construction well beyond just the space between the vertical > posts. > > As I recall, on the left, the flange

Re: Looking for: 68000 C compilers

On 2/6/19 1:23 PM, Tomasz Rola via cctalk wrote: > On Wed, Feb 06, 2019 at 10:13:57PM +0100, Tomasz Rola via cctalk > wrote: [...] >> quite a few compilers in there: >> >> http://aminet.net/tree?path=dev > > And on page 1 of 5 in /dev/asm section I have spotted at least two > disassemblers,

Re: Kemners Surplus - Real time walkthrough

On 2/18/19 8:10 AM, Bill Degnan via cctalk wrote: > Of the items in > > https://photos.app.goo.gl/4Q8Jx7n36fmVczLN8 > > This photo depicts a Raytheon VT302, I did not see the keyboard in the > photo, hoping it is not lost: > >

Re: Kemners Surplus - Real time walkthrough

I'll add a postscript to my bit on Wupro disinterest. Exxon went into the WP business briefly by purchasing Vydec along with Qyx. Nobody seems to remember those either. Who collects old FAX machines, for example? FWIW, on eBay, there's an Exxon Verbex voice recognition box that seems to have

Re: Wirewrap DIP sockets - any interest?

On 2/12/19 8:30 AM, Jon Elson via cctalk wrote: > On 02/11/2019 06:25 PM, Bill Degnan via cctalk wrote: >> What is the gold value? >> >> > ARRgh!  Not more than a few milligrams per the usual DIP sockets. Likely > not worth the trouble of grinding them up to extract the gold from all > that base

Re: Looking for: 68000 C compilers

On 2/12/19 4:06 PM, Frank McConnell via cctalk wrote: > I remember moving Lattice C v2 from IBM PC diskettes to an HP 150. It was > MS-DOS applications and compiler and linker worked on the 150. No copy > protection. Lattice C was recommended by Microsoft to OEMs in the DOS 1.-2. days.

Re: Looking for: 68000 C compilers

Is Lattice C 2.whatever for 8086 uncommon? I have a copy on a couple of floppies. --Chuck

JPL Auction

Those of you in So. Cal. may be interested. Lots of Sun stuff: https://gsaauctions.gov/ATTACHMENT/REGN9/91QSCI19501806/806ListingofAvailableItems.pdf -- --Chuck Sent from my digital computer

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/11/19 9:16 AM, Fred Cisin via cctalk wrote: > A few hundred pounds slid all the way out will topple it. > If the center of gravity is NOT within the perimeter of the base, . . . > Need to bolt the rear to the floor, or something SOLID, and extend the > "footprint" of the front to include

Re: sun 88780 on ebay

On 2/11/19 10:01 AM, Eric Smith via cctalk wrote: > On Mon, Jan 28, 2019 at 6:03 PM Al Kossow via cctalk > wrote: > >> https://www.ebay.com/itm/132933407806 >> > > It was packaged improperly by the seller and destroyed in transit. Happens all too often. Palletizing is probably the safest, but

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/11/19 10:48 AM, Tapley, Mark via cctalk wrote: > Jack, this looks like a pretty good idea in the short term. But, every piece > of concrete I have ever been associated with has been off-gassing water at a > slow rate. I have stored wood face-down on concrete enough times that I > should

Re: Hickok MEM-70 Core Memory Trainer

On 2/10/19 3:37 PM, Kyle Owen via cctalk wrote: > Picked up this core memory trainer yesterday. Seems pretty obscure. > > http://imgur.com/a/TIOvt7r > > Has anyone seen one before? Would love to find some documents someday. > > Thanks, Looks interesting--I wonder if this is the same Hickock

Re: a timer for the PC - screen tme for the kids

On 2/14/19 11:17 PM, Randy Dawson via cctalk wrote: > Before I develop this, I thought it may already exist, and the classiccmp > mail list might be the place to ask. > > What we have, is the screen time problem with the kids. If we are not there > hounding and policing them, they will be on

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/6/19 2:29 PM, Brent Hilpert via cctalk wrote: > (I take it you mean "now look at the -left- side".) Well, you know, my *other* right... :) > However, looking at my 7970A, it appears you could separate the cast-Al > transport frame from the chassis box > by unscrewing the 4 exterior

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/5/19 12:19 PM, Jack Harper via cctalk wrote: > > > Greetings to the List - > > My very sincere THANKS for the enlightening responses from Chuck Guzis, > Brent Hilpert and Jay West on mounting the HP 7970 tape drive Beasts. > > I am out of town on business for a couple days and will

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/6/19 6:33 PM, Brent Hilpert via cctalk wrote: > Granted you could drill the holes from the rear of the flange, > however from what I can see the hinge design doesn't look like it > will allow the transport frame to swing far enough to clear access > for the screwdriver shaft to tighten the

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/6/19 10:42 PM, Brent Hilpert via cctalk wrote: > Well, maybe they changed the hinge design slightly for the model you're > looking at. > Here are some pics of the 7970A with the transport open at 90 deg: > http://madrona.ca/tmp/HP7970A/hingeTop.jpg >

Re: Ultimate FDC? (Was: IBM 6360 - Filesystem(ish) info?

With all deference to the real collectors, I don't see the objective here. The thing should be NEC 765 compatible? Why? What about non-NEC-based sytems (e.g. the bulk of CP/M and countless other systems that don't use an LSI controller)? Or those systems that permanently already have a

Re: Ultimate FDC? (Was: IBM 6360 - Filesystem(ish) info?

On 2/19/19 3:40 PM, William Sudbrink via cctalk wrote: > A design that can manage Ohio Scientific as well would be nice. Might as well add Victor 9000... --Chuck

Re: IBM 6360 - Filesystem(ish) info?

On 2/19/19 12:05 PM, Anders Nelson via cctalk wrote: > Ah, cool thanks! > > I'm interested in storing arbitrary files in the manner close to the > original as possible. Sounds like the extent list and allocation map would > be useful for this; not so much the document content format. > -- >

Re: IBM 6360 - Filesystem(ish) info?

On 2/19/19 8:48 AM, Anders Nelson via cctalk wrote: > Hi friends, > > Now that I have my glorious disk toaster (2D model I think, says "2D" on > the drive levers), I want to build a controller for it. I found pinouts and > some description of the media organization here: > >

Re: Ultimate FDC? (Was: IBM 6360 - Filesystem(ish) info?

On 2/19/19 2:02 PM, Fred Cisin via cctalk wrote: > Ability to read MFM data with FM headers (RX50) It's not that simple. There's the matter of "DEC MFM" which encodes a few bit patterns differently to avoid collision with FM headers. --Chuck

Re: E01 (Was: Raspberry Pi floppy interface.

On 2/4/19 3:22 PM, John Foust via cctalk wrote: > At 04:49 PM 2/4/2019, Fred Cisin via cctalk wrote: >> And, of course, a lossy compression, such as MP4 leaves room for an enormous >> amount of steganographic data, with documants and data hidden in porn. >> (MANY different MP4 files will still

Re: E01 (Was: Raspberry Pi floppy interface.

On 2/4/19 3:40 PM, Jim Manley via cctalk wrote: > Did someone say "punched cards ... with steganographic bits in chads that > are only attached along a couple of edges"? NCR CRAM?

Re: E01 (Was: Raspberry Pi floppy interface.

On 2/4/19 2:49 PM, Fred Cisin via cctalk wrote: > Well, conversion between E01 and IMD or teledisk formats looks > straightforward. > > http://www.forensicsware.com/blog/e01-file-format.html > Is there a better description handy? > > eg: What is the structure of the "Header Case Information"

Re: Mounting HP7970e 9-Trk 1/2" Tape Drive

On 2/4/19 3:40 PM, Jack Harper via cctalk wrote: > > > Greetings to the List - > > I am mounting a couple of heavy (130-pounds each) HP7970e tape drives to > a 19" rack. > > The screw holes that mate to the standard spaced holes on the right side > of the drive after you open the case are

Re: Raspberry Pi floppy interface.

On 1/18/19 7:40 AM, geneb via cctalk wrote: > This looks like a project with a ton of potential for archviving media > without having to deal with the asshattery of the kryoflux people. > > https://github.com/picosonic/bbc-fdc Yes, you can do this, as I've said many times before, with just about

Re: Raspberry Pi floppy interface.

On 2/4/19 1:17 PM, Paul Koning wrote: > Yes, but if the current format is wrong for the job, and people who should > know better do not realize this, it would be a good idea (as a separate > activity) to educate them and propose a better answer. Yes, I know, and I've tried and written volumes

Re: Daisywhell typewriter emulating a TTY

gt; > Thanks, > Dave > > > On 4/10/2019 11:56 AM, Chuck Guzis via cctalk wrote: >> Dave, >> >> I'd love to see the keyboard and printed output; unfortunately, the >> listserv strips out anything but test.   Got a link? >> >> --Chuck >> >&

Re: Pleas ID this IBM system....

On 4/6/19 2:05 PM, Al Kossow via cctalk wrote: > >> Do you have any idea of the cost to package and ship a 360 >> from there? > > Less than the current value of a dead billionaire. Does Germany harbor no gold bugs?

Re: Storage for 1/2" open reel tape

On 4/8/19 10:44 AM, Kevin Monceaux via cctalk wrote: > On Fri, Apr 05, 2019 at 10:57:54AM -0700, Chuck Guzis 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 thes

Re: 1/2" tape storage.

Just got Larry Urbanski's film cans in--about the same as the others; 800' can fits a 10.5" tape reel perfectly. The difference is that Urbanski's aren't vented, which, while being a minus for acetate movie film, is probably a plus for mag tape: Image here: https://i.imgur.com/pVfkFqW.jpg At

Re:  Storage for 1/2" open reel tape

On 4/8/19 9:06 PM, Jeff Woolsey via cctech wrote: >> 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. > > I have about a hundred tapes from various contributors, and have

Re: Daisywhell typewriter emulating a TTY

On 4/10/19 2:11 PM, Mark Moulding via cctalk wrote: > The Diablo was the first one I thought of.  I had one for some time, and > it was very reliable and produced high quality output.  Also much faster > than the Teletype, and faster also than the TermiNet 300 I had at the > same time. There's

Re: Plane of core memory

On 4/18/19 9:42 AM, Al Kossow via cctalk wrote: > > The 1401 guys at CHM were working on one using a real 701 tube. > I don't think it was ever finished. I don't expect that any EBAM has survived--I think all of the stuff I saw at CDC ADL was scrapped. Seems that the technology is all but

Re: Plane of core memory

My mention of electron-beam memory devices left off GE's BEAMOS and RCA's Selectron. WikiPedia has a nice article on the Selectron, but BEAMOS took a bit of looking: http://rcaselectron.com/GEBEAMOS.html Too bad that neither RCA nor GE were in the computer business in 1978. --Chuck

Re: Interesting article in Spectrum about IBM's System/360

On 4/12/19 11:15 AM, Eric Smith via cctalk wrote: > The article says: > > Poughkeepsie’s engineers were close to completing work on a set of four >> computers known as the 8000s that were compatible with the 7000s. > My tendency has been to consider 7000 xeries machines as transistorized 700

Re: Daisywhell typewriter emulating a TTY

On 4/12/19 10:00 PM, Dave Babcock via cctalk wrote: > Chuck, > > The Group Mark key was on later IBM 1620 Model 1 typewriters as well as > the Model 2 Selectrics. > > See: > https://www.dropbox.com/s/p2b1449zr6uqh6p/IBM_1620_Console_Typewriter.png?dl=0 > > > The flagged numeric blank was

Re: Tape reading question

On 3/11/19 10:49 AM, Patrick Finnegan via cctalk wrote: > Ah, interesting. > > I've got a drives, but bad rollers (and one burned out EOT lamp to replace, > which is annoying but should be easy enough). > > Any suggestions on sizes for the rollers? I have one that is starting to > go, and the

Re: Network cards and Win98SE

On 5/12/19 3:41 PM, Charles via cctalk wrote: > I have tried for two days to get wireless networking running on my old > PC under Win 98SE, so I can use PUTR without a separate partition or > boot. XP is on an 8.4 GB drive. 98SE is on an older 540 MB drive. The older Linksys WMP54G and GS will

Re: Network cards and Win98SE

On 5/12/19 7:33 PM, Grant Taylor via cctalk wrote: > On 5/12/19 6:29 PM, Chuck Guzis via cctalk wrote: >> Something else you may want to consider if your 98SE box has a >> traditional NIC is using a cheap wifi-equipped micro as a network >> bridge.  I've done that us

Re: Network cards and Win98SE

Something else you may want to consider if your 98SE box has a traditional NIC is using a cheap wifi-equipped micro as a network bridge. I've done that using an Orange Pi Zero and it works very well. Wfi to the OPZ and RJ-45 to the 98SE system. No need for fancy network negotiation on the Win98

DG One owners? I think I have something.

A kindly donor sent me an external numeric keypad from Data General. It has the right keycaps and color for a DG One laptop. Model number 2568. Connection is via a 3-terminal plug; basically a miniature stereo headphone plug. I'll give this up to a One collector who can identify this for

Re: Raised Floors

On 5/24/19 9:12 PM, Carlos E Murillo-Sanchez via cctalk wrote: > Sulfuric acid is hard to wash off; the amount that made it to the room > must have been pretty small, otherwise people couldn't be allowed in.  > And, if it was bad enough to corrode boards, imagine what that would do > to your

Re: Audio Devices, Inc. company history?

I had a look at a couple of additional reels of Audio Devices tape from 1965 and 1966. Both were darker and labeled with an "Certified for 800 bpi" sticker and well as a "Heavy Duty Made with 1.5 mil DuPont Mylar". I'm concluding that the tape in question is pretty darned old. --Chuck

Audio Devices, Inc. company history?

I've got a few old reels of milk-chocolate brown 7-track tape here and was wondering if it's possible to date them accurately. The reels themselves have the Audio Devices name molded into them; the rear white flange is quite yellowed with age. The tapes have been used quite heavily as they've

Re: looking for an old IBM knob from a 609 calculator panel

On 5/28/19 10:35 AM, William Donzelli via cctalk wrote: > Those knobs look like they are cast pop metal or zinc or something, > not Bakelite. What flavor pop? ("pot" metal or monkey metal). --Chuck

Re: tape seals?

On 6/7/19 8:25 AM, Jon Elson via cctalk wrote: > On 06/05/2019 06:05 PM, Stan Sieler via cctalk wrote: >> Hi, >> >> I think someone was looking for tape seals for 9 track tapes, a few weeks >> ago. >> >> If they can contact me offline, I have about 20 of varying sizes for >> shipping cost or local

Re: tape seals?

Another failure category that I've experienced with very old IBM reels is that the "blue back" ones can have a tendency to come apart; that is, the rear flange separates from the front. The "blue" ones are a bit different in attachment from the "brown" ones in that the two halves are held

Re: HP9816 PAL16L8

On 6/10/19 8:44 PM, Tony Duell via cctalk wrote: > > You can detect sequential logic in the PAL by : > > For each combination of inputs : >Read the outputs > Toggle an input (change from 0 to 1 and back again or vice versa) > Compare the outputs to what they were before -- if they

Re: HP9816 PAL16L8

On 6/11/19 11:40 AM, Paul Berger via cctalk wrote: > > Well in this case I have Mr Duell's schematic to go by to determine what > is input an what is output.  For the 16L8 tristate is an available > output option that you would need to specify in PLD design and I believe > can be selected

Re: HP9816 PAL16L8

On 6/11/19 10:54 AM, Tony Duell via cctalk wrote: > I have just remembered something that I guess you realised some time > back... > > The 16L8 allows you to tri-state outputs under logic control (I think there's > one AND term for the output control of each output). I suspect this is used > in

Re: One of the deeper dives into RISC vs CISC I've seen

On 6/12/19 10:14 AM, Paul Koning via cctalk wrote: > > >> On Jun 12, 2019, at 11:59 AM, Liam Proven via cctalk >> wrote: >> >> Goes a bit over my head but may be of interest: >> >> https://userpages.umbc.edu/~vijay/mashey.on.risc.html > > Nice. Still reading through it. > > I like his

Re: One of the deeper dives into RISC vs CISC I've seen

On 6/12/19 1:47 PM, alan--- via cctalk wrote: > > I especially appreciated he not only offered an opinion - his specific > ideas on where the boarder between RISC and CISC was - but then provided > an analysis of a bunch of processors based on those criteria and an > analysis of the outliers that

Re: One of the deeper dives into RISC vs CISC I've seen

On 6/15/19 7:47 AM, Stefan Skoglund wrote: > > With VAX 11/780 and S/360 involved ? I don't think so soo > the Cyber series and 709(4) could be interesting. It's difficult to say exactly, because of the constraints on the definition. Or does something have to be RISC only if it came after the

Re: One of the deeper dives into RISC vs CISC I've seen

On 6/15/19 3:40 PM, ben via cctalk wrote: > On 6/15/2019 8:47 AM, Stefan Skoglund via cctalk wrote: > >> With VAX 11/780 and S/360 involved ? I don't think so soo >> the Cyber series and 709(4) could be interesting. > > Well the early 1960's was the rise of BIG IRON that had REAL POWER > and

Re: What is this?

Found a bit more detail on WALNUT: https://nvlpubs.nist.gov/nistpubs/Legacy/TN/nbstechnicalnote157.pdf See page 86. Includes some B photos, including one of the unit that you show. Was WALNUT ever used outside of the CIA? --Chuck

Re: What is this?

On 5/10/19 12:45 PM, Donald via cctalk wrote: > http://www.myimagecollection.com/webpics/unknownmachine.jpg > > > > The model number looks like 9603. Can't tell for sure. The box in back has > the 14xx flavor. IBM 9603 WALNUT - Microfilm image storage and retrieval system. Read about it

Re: What is this?

On 5/10/19 2:57 PM, Fred Cisin via cctalk wrote: With no first-hand knowledge, I would assume that NSA also used such. > > Half a century ago, when I worked at The National Space Science Data > Center (NASA, Greenbelt) we dealt with a lot of data.  But that is like > a floppy compared to NSA,

Re: Possible PUTR bug?

On 5/11/19 8:22 AM, Douglas Taylor via cctalk wrote: > Finding a PC that supports the 5-1/4" floppy drive is difficult, the > BIOS or FDC chips only support 3-1/2" floppies in many late model PC's.  > It appeared only a few of the older PC's that supported the 5-1/4" > drives could actually

Re: How were 32-bit minis built in the 70s/80?

On 5/11/19 9:52 PM, ben via cctalk wrote: > On 5/11/2019 10:12 PM, Chuck Guzis via cctalk wrote: > >> Personally, I preferred "the Naked Mini" > Used for porn world wide.:) >> --Chuck > Maybe--it was an 8 bit mini, so not very powerful. Mostly used in what

Re: Possible PUTR bug?

On 5/11/19 11:40 AM, Fred Cisin via cctalk wrote: > On Sat, 11 May 2019, Chuck Guzis via cctalk wrote: >> In the case of RX50 on the PC, it doesn't matter.  The format is 10 >> sectors of 512 bytes, which isn't supported by the PC BIOS in any >> regular sense (9 sectors i

Re: How were 32-bit minis built in the 70s/80?

On 5/11/19 8:52 PM, Nigel Williams via cctalk wrote: > Marketing at the time even had a catchy name for the 32-bit minicomputer: > > https://en.wikipedia.org/wiki/Superminicomputer > Personally, I preferred "the Naked Mini" https://www.computerhistory.org/revolution/minicomputers/11/359

Re: How were 32-bit minis built in the 70s/80?

On 5/11/19 4:14 PM, Warren Toomey via cctalk wrote: > I'm building my own 8-bit CPU from TTL chips, and this caused me to think: > how were 32-bit minis built in the late 70s and early 80s? In particular, > how was the ALU built? I know about the 74181 4-bit ALU, and I know (from > reading A Soul

Re: Possible PUTR bug?

On 5/11/19 2:00 PM, Fred Cisin via cctalk wrote: > Although I enjoyed DeSmet C, I used Microsoft C for all subsequent high > level language progams that I wrote.  For example, I wrote the screen > capture TSR of "XenoFont" in MASM, and the printing program in Microsoft > C; I wrote "Sales tax

Re: Network cards and Win98SE

On 5/13/19 11:58 AM, Grant Taylor wrote: > On May 12, 2019, at 10:17 PM, Chuck Guzis via cctalk > wrote: >> Don't know a thing about gaming and never wanted to--wrong generation, I >> guess. > > Perhaps “gaming adapter” is the wrong term for this audience. > >

Re: Network cards and Win98SE

On 5/13/19 4:05 PM, Charles via cctalk wrote: >> You could have installed a gaming adapter, opened the web page, >> connected it to the wireless and been done. > > Sure, but you assume I know anything about online gaming (I don't); it > would require purchasing one, *and* I already had the

Re: Network cards and Win98SE

On 5/13/19 4:21 PM, Grant Taylor via cctalk wrote: > "gaming adapter" is a broad category like "vacuum / hoover" or "copier / > Xerox" or "tissue / Kleenex" or "automobile".  All of which have many > names that can be used equally across many different broad categories. > > "Gaming adapters"

Re: Network cards and Win98SE

On 5/13/19 7:50 PM, Grant Taylor via cctalk wrote: > On 5/13/19 5:38 PM, Chuck Guzis via cctalk wrote: >> So which term came first, "gaming adapter" or "network bridging"? > > Without a doubt, "network bridging".  But good luck going into the > ave

Re: Network cards and Win98SE

On 5/13/19 9:10 PM, Grant Taylor via cctalk wrote: > On 5/13/19 10:04 PM, Tony Duell via cctalk wrote: >> Those who know me, for example, will know I have little interest in >> physical exercise. But I bought a mat intended for such activities >> because it was a suitable material for lininng a

Re: Tape seals?

On 5/18/19 8:25 AM, Al Kossow via cctalk wrote: > > > On 5/18/19 7:33 AM, Shoppa, Tim via cctalk wrote: > >> Is there any outfit that sells "new tape seals"? Or a preferred better way >> to hang tapes in 2019? > > FWIW, IBM auto-load hard plastic seems to be holding up better, you might be >

Re: Pleas ID this IBM system....

On 5/22/19 12:49 AM, Christian Corti via cctalk wrote: > 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 >

Re: Tape seals?

On 5/19/19 6:37 PM, Guy Dunphy wrote: > Just a thought - I buy small ziplock bags of various sizes in bulk from > Aliexpress. Very cheap. > I use them around the workshop, electronics, and for filing B5-sized > documents in storage cubes. > > It seems likely there would be ziplock bags that

Re: Pleas ID this IBM system....

The model 20 installations that I played with were mostly to supplant unit-record gear, which typically did not use a raised floor configuration. Mostly the CPU, card mulcher, printer and perhaps a 2311. The installation auctioned off is one of the larger Model 20 setups that I've seen. --Chuck

Re: Pleas ID this IBM system....

On 5/21/19 1:17 PM, Grant Taylor via cctalk wrote: > I'm sure that was /a/ problem.  But I'm not comfortable attributing that > problem to the raised floor. > > I expect that the same problem would be effected by an elevator that > doesn't stop perfectly level with the floor, or has too wide a

Re: Pleas ID this IBM system....

On 5/21/19 12:34 PM, William Donzelli via cctalk wrote: > I might think far more "obsolete" than "bad idea". It worked very well > for the mainframe folks. ...except when it didn't. On more than one occasion, I recall watching some poor soul with a cart balanced with long (3 foot) trays full of

Re: Pleas ID this IBM system....

On 5/21/19 12:55 PM, William Donzelli wrote: > You can't blame anyone but they idiot using a 3 wheel cart while > moving decks of cards. No sympathy from me. They were using what was available. I bought their own four-wheel cart (looked like a standard gray industrial shop cart that you can

OT: Gaming Gear

Okay, Newegg dropped a deal on a Seagate 25B "Gaming" SSHD. Exactly what does that mean? --CHuck

Re: Network cards and Win98SE

On 5/14/19 7:19 AM, Chris Elmquist wrote: > But now you are going to be bombarded with ads for yoga pants... Sure, picture me in yoga pants--and before lunch yet. Have you no respect for utter revulsion? --Chuck

Re: Network cards and Win98SE

One other problem I have with the term "gaming adapter" is the overuse by the marketeers of the term "gaming". So we have gaming systems, keyboards, monitors, mice, chairs and probably coffee cups. The original meaning of "to game" is "manipulate (a situation), typically in a way that is unfair

Re: Pleas ID this IBM system....

On 5/20/19 2:04 PM, Adrian Stoness via cctalk wrote: > try crawling under them You'd only upset the mice and the cockroaches. I recall that back in the day at CDC SVLOPS, the local CEs made a pet of one of the sub-floor mice. Field crickets were a problem back then too--the moment that the

Re: Unknown 1970 Tapedrive

On 4/30/19 11:20 AM, William Donzelli via cctalk wrote: >> The Sangamo Electric Co . >> manufactured electrical meters, time switches and sonar and radio >> equipment, among other items, in Springfield, IL from the 1890s until 1978. > > And a

Re: Unknown 1970 Tapedrive

On 4/30/19 9:28 AM, jos via cctalk wrote: > > I put up some more pics (Tapehead & capstan drive). It does not use > stepper. > > It seems it was made by US firm Sangamo, as is etched in some of the PCB's > > In view of the head's condition I will not persue this further. > The head doesn't

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

On 5/1/19 6:58 PM, Dennis Boone via cctalk wrote: > > I got a great pair of cables for this project. 50 conductor, 50 pin > > IDC, 10 feet long. > > So the minicomputer vendors in the 80s typically used twisted pair > ribbon for these things, as in the 1700/50 stuff Glen was talking > about.

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