Re: RS-232 Tx / Rx monitoring LEDs?

I've also seen C-R series voltage dropping circuits, here & there. Correct me if I'm wrong, but doesn't the series cap dissipate power just as it would, were it a series resistor? I mean, if the LED is passing 20mA, the cap is also doing 20mA - and at whatever the Vdrop is. Right? If not, why? O

Re: A tale of woe, including carelessness, stupidity and laziness....

On Sat, Aug 22, 2015 at 11:44 PM, tony duell wrote: > > I have heard similar warnings about working on cars while wearing > rings, or worse a wristwatch with a metal strap. A car battery can provide > many hundreds of amps for a short period. > > My cousin (who is a seasoned vehicle tech) once ma

RE: Reversed Electrolytics redux

> > Also, I now know why the +5 V is high. It has a UA 7805 3 terminal regulator > serving as a voltage reference for a TIP-3055 so the supply can provide more > current. That 7805 has a forward biased diode between the center terminal > and ground, thus raising the output voltage by right aroun

Re: Reversed Electrolytics redux

I figured as much. And, with a 10K ohm bleeder resistor that I added on the output (another added safety feature), the voltage dropped down to 5.2 and change - within spec. JRJ On 8/22/2015 6:19 PM, Dave G4UGM wrote: >> >> Also, I now know why the +5 V is high. It has a UA 7805 3 terminal > reg

RE: VT100 preventative maintenance?

> > ... > > [1] In the UK we call all CRT elecrodes after the control grid (first grid) > > 'anodes' which > > makes sense as they are run +ve wrt the cathode. > > So does a UK tetrode have one grid and two anodes? Or is there one > terminology for > CRTs and a different one for other tubes?

Reversed Electrolytics redux

On 8/22/2015 2:41 PM, Jay Jaeger wrote: > > Unfortunately, bearings did not help the floppy drive, so now I am busy > taking the floppy power supply I got with my FD 100-8, making sure it is > up to spec to use with the Shugart (and correcting that if needs be), > and making it safer (mains fuse,

Re: RS-232 Tx / Rx monitoring LEDs?

On 08/22/2015 10:23 PM, dwight wrote: I would think the reverse voltage sum of the diodes is enough. Different diodes also can handle different voltages. Since the sum of the forward voltages is enough to handle AC, I'd suspect the reverse voltages each would handle is quite small as well. The p

RE: RS-232 Tx / Rx monitoring LEDs?

> From: ccl...@sydex.com > > On 08/21/2015 08:36 AM, dwight wrote: > > I was going to add something but it has already been said several > > times. I will add that if using a LED on an AC like signal of high > > voltage, one should use a diode. I recommend using a shunt diode > > rather than a ser

RE: VT100 preventative maintenance?

> > Also note that we use the term 'valve' for diodes, triodes, etc, but > > 'tube' for CRTs, nixie tubes, dekatrons, voltage stabilisers, > > probably trochotrons, etc. There seems to be no obvious reason for > > what is a 'valve' and what is a 'tube'. > Based on your examples, it sounds to me

RE: A tale of woe, including carelessness, stupidity and laziness....

> > The engineer said that it wasn't a problem because the highest voltage > on the backplane is 5V. The manager pointed out that the power supply > was rated for 600A, and undoubtedly could source more than that > briefly, and to think about what would happen to your finger if you > had hundreds

Re: (OT?) Copyright and IP

"This goes directly against how information behaves, which is to flow freely. " Information has neither preference nor intent, nor any other inherent behavioral characteristic(s). You could make a water or electricity analogy - but both of those are most often regulated, channeled, stored-up and

Re: Sign magnitude, one's complement, two's complement

On 08/22/2015 06:26 PM, Paul Koning wrote: than the usual rule). I recall the "integer multiply" feature (i.e. optional) available on the 6000. IXi Xj*Xk, but it didn't provide any more precision than the usual unnormalized double-precision multiply DXi Xj*Xk, but saved some time spent fidd

RE: Silent 785 docs?

Glen wrote... - Is that the one you rescued from somewhere in LA? Was wondering if you were able to successfully manage that. - Nope. That was an 800 series KSR. I still want that, but the business trip I was hoping to use to justify it never materialized. Still looking for someone in NO

Re: Silent 785 docs?

On Sat, Aug 22, 2015 at 9:08 AM, Jay West wrote: > I've got a TI Silent 785 I'm trying to get configured/running. Is that the one you rescued from somewhere in LA? Was wondering if you were able to successfully manage that.

Re: 9-Track 1/2" Tape Drive Recommendations?

On 08/22/2015 02:14 PM, Al Kossow wrote: No, I haven't the faintest idea where you would even find a copy today. I did find a reference to the CCVS suite of tests for sequential I/O: http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA019757 TOG lists the 1985 suite

Re: Sign magnitude, one's complement, two's complement

> On Aug 22, 2015, at 9:15 PM, Chuck Guzis wrote: > > On 08/22/2015 04:40 PM, Paul Koning wrote: >> >>> On Aug 22, 2015, at 6:27 PM, Chuck Guzis wrote: >>> >>> ...FLoating point can engender some interesting representations. >>> Consider the exponent field on the aforementioned CDC 6000 serie

RE: Silent 785 docs?

I had written Anyone have operators and/or service manual for the Silent 785? Still looking for the manual, but... found a quick reference guide inside the unit. I had seen it before, but didn't see the note on the back at the bottom regarding configuration. Long story short, by defa

Re: Sign magnitude, one's complement, two's complement

On 08/22/2015 04:40 PM, Paul Koning wrote: On Aug 22, 2015, at 6:27 PM, Chuck Guzis wrote: ...FLoating point can engender some interesting representations. Consider the exponent field on the aforementioned CDC 6000 series. It's a "biased by 2000 octal) system--and the assumed binary point of

Re: 5.25 floppies that read but don't write

> Do we know the make/model of this drive? It's a Chinon FR-506 (NOT an FZ-506) >On 5.25" HD drives, pin 2 is generally a drive *input*. That is, the >host telegraphs what's needed, not the drive. Indeed, you have to be careful to put the right media and issue the proper density specific format

Re: 9-Track 1/2" Tape Drive Recommendations?

On Aug 22, 2015 1:08 AM, "Ali Fahimi" wrote: > > Hello All, > > Recently I came across a complete Pertec interface (card, manual, software, > and, cables) thanks to list-member Shaun. Of course what is the point of > having an interface if you have nothing to interface it to! What controller did

Re: Sign magnitude, one's complement, two's complement

> On Aug 22, 2015, at 6:27 PM, Chuck Guzis wrote: > > ...FLoating point can engender some interesting representations. Consider > the exponent field on the aforementioned CDC 6000 series. It's a "biased by > 2000 octal) system--and the assumed binary point of the mantissa is to the > right

Re: VT100 preventative maintenance?

> Also note that we use the term 'valve' for diodes, triodes, etc, but > 'tube' for CRTs, nixie tubes, dekatrons, voltage stabilisers, > probably trochotrons, etc. There seems to be no obvious reason for > what is a 'valve' and what is a 'tube'. Based on your examples, it sounds to me as though

Re: Sign magnitude, one's complement, two's complement

On 08/22/2015 02:23 PM, Sean Conner wrote: For my own morbid curiosity, and because it came up on another mailing list I'm on [1], what machines commercially avaialble were sign magnitude and one's complement? Every machine I've encountered was two's complement (okay, IEEE 754 [2] is a sign mag

Re: Sign magnitude, one's complement, two's complement

On 08/22/2015 04:49 PM, Al Kossow wrote: On 8/22/15 2:23 PM, Sean Conner wrote: For my own morbid curiosity, and because it came up on another mailing list I'm on [1], what machines commercially avaialble were sign magnitude and one's complement? A table of what computers had what numer

Re: Sign magnitude, one's complement, two's complement

On 08/22/2015 04:23 PM, Sean Conner wrote: For my own morbid curiosity, and because it came up on another mailing list I'm on [1], what machines commercially avaialble were sign magnitude and one's complement? Every machine I've encountered was two's complement (okay, IEEE 754 [2] is a sign m

Re: Sign magnitude, one's complement, two's complement

> On Aug 22, 2015, at 5:49 PM, Al Kossow wrote: > > On 8/22/15 2:23 PM, Sean Conner wrote: >> >> For my own morbid curiosity, and because it came up on another mailing >> list I'm on [1], what machines commercially avaialble were sign magnitude >> and one's complement? > > A table of what co

Re: A tale of woe, including carelessness, stupidity and laziness....

On 08/22/2015 02:41 PM, Jay Jaeger wrote: Thanks. Really, such mistakes aren't too demoralizing if one can get the parts, get them in a reasonable amount of time, at a reasonable price, and have the skill to do the fix One of the biggest oopses I ever had was I got a Memorex 10 MB hard drive wi

Re: Sign magnitude, one's complement, two's complement

On 2015-08-22 5:49 PM, Al Kossow wrote: On 8/22/15 2:23 PM, Sean Conner wrote: For my own morbid curiosity, and because it came up on another mailing list I'm on [1], what machines commercially avaialble were sign magnitude and one's complement? A table of what computers had what numeric r

Re: Sign magnitude, one's complement, two's complement

On 8/22/15 2:23 PM, Sean Conner wrote: For my own morbid curiosity, and because it came up on another mailing list I'm on [1], what machines commercially avaialble were sign magnitude and one's complement? A table of what computers had what numeric representation is one of those things that

Re: Sign magnitude, one's complement, two's complement

Univac 1100 series - one's complement. On 8/22/2015 4:23 PM, Sean Conner wrote: > > For my own morbid curiosity, and because it came up on another mailing > list I'm on [1], what machines commercially avaialble were sign magnitude > and one's complement? Every machine I've encountered was two'

Re: Sign magnitude, one's complement, two's complement

On 2015-08-22 5:23 PM, Sean Conner wrote: For my own morbid curiosity, and because it came up on another mailing list I'm on [1], what machines commercially avaialble were sign magnitude and one's complement? Every machine I've encountered was two's complement (okay, IEEE 754 [2] is a sign m

Re: A tale of woe, including carelessness, stupidity and laziness....

On 8/22/2015 4:11 PM, Eric Smith wrote: > In my mostly misspent youth, I once had the opportunity to visit a > facility where a now obscure supercomputer was developed. The product > manager was showing me around. That wasn't Astronautics' ZS, by any chance? I ask, because I know some fol

Re: Larry Niven's Altair

On Sat, 22 Aug 2015, Tothwolf wrote: Indeed. Apple even screwed up on this with their iconic rainbow apple logo. I discovered this while researching the history of the logo while doing image work on Wikipedia / Wikimedia Commons many years ago. It is still a trademark, but the image is public d

Sign magnitude, one's complement, two's complement

For my own morbid curiosity, and because it came up on another mailing list I'm on [1], what machines commercially avaialble were sign magnitude and one's complement? Every machine I've encountered was two's complement (okay, IEEE 754 [2] is a sign magnitude format but I'm talking about integer

Re: 9-Track 1/2" Tape Drive Recommendations?

On 8/22/15 11:43 AM, Chuck Guzis wrote: Historically, the two are very different in application. If you've got a COBOL handy on your tape system, try running the 1974 Navy Audit Tests, once the set of benchmarks by which CODASYL compliance of a vendor's COBOL was judged. (Al, do you have a co

Re: A tale of woe, including carelessness, stupidity and laziness....

On Sat, Aug 22, 2015 at 1:41 PM, Jay Jaeger wrote: > But the carelessness was DANGEROUS, which is really why I posted it. > > (BTW, in the way of other stories, a good friend once took out the > processor UNIBUS interface and damaged peripherals when his watch > shorted to the backplane of a PDP-1

Re: Larry Niven's Altair

On Thu, 20 Aug 2015, Paul Koning wrote: On Aug 20, 2015, at 10:30 AM, Jay Jaeger wrote: On 8/20/2015 3:32 AM, Randy Dawson wrote: I assume all the 8K, 4K BASICs are in public domain by now. The demo for the kids will be the 15 minutes of paper tape, followed by READY. Bad assumption. Thin

FS: PDP-11/55

I have nothing to do with this...I just noticed it on alt.sys.pdp11 and figured that I'd pass it along. TTFN - Guy Hi all, I have a PDP-11/55 for sale (Ottawa, Ontario, Canada). Bids open until 2015 09 15, buyer to arrange shipping, I will have it wrapped and ready to go. Plea

RE: De-yellowing

On Sat, 22 Aug 2015, Dave G4UGM wrote: On Sat, 22 Aug 2015, Pete Turnbull wrote: On 22/08/2015 13:50, Tothwolf wrote: On Sat, 22 Aug 2015, Dave G4UGM wrote: All the techniques discussed so far involve using a "bleach" of some kind and possibly UV light. Some use other materials so you have a

RE: VT100 preventative maintenance?

> > Oooh, didn't know about the diodes. Are there any specific ones that you Err, no... There is this witch-hunt against capacitors, but other components are never considered > think should be replaced no matter what? If not, are there any tests you > would recommend? There are several supplies

Re: VT100 preventative maintenance?

> On Aug 22, 2015, at 3:14 PM, tony duell wrote: > > ... > [1] In the UK we call all CRT elecrodes after the control grid (first grid) > 'anodes' which > makes sense as they are run +ve wrt the cathode. So does a UK tetrode have one grid and two anodes? Or is there one terminology for CRTs

VT100 preventative maintenance?

Hi all, I have two VT100 terminals. Both of them work just fine. Should I leave well enough alone, or is there preventative maintenance that should be done? For instance, should capacitors be proactively replaced. In general, I'm thinking about things that, if they fail catastrophically, would ca

Re: VT100 preventative maintenance?

Oooh, didn't know about the diodes. Are there any specific ones that you think should be replaced no matter what? If not, are there any tests you would recommend? Regards Rob On 22 August 2015 at 19:10, tony duell wrote: > > > > Should I leave well enough alone, or is there preventative mainte

Re: VT100 preventative maintenance?

I can't say I know for sure, but I did replace all the electrolytics on the video control boards of both my VT101 and VT102, because there was a definite wobble to the image on both terminals. Replacing all of them fixed the wobble. As I have posted before, I did this after testing each capacitor w

RE: VT100 preventative maintenance?

> > Should I leave well enough alone, or is there preventative maintenance that > should be done? For instance, should capacitors be proactively replaced. In > general, I'm thinking about things that, if they fail catastrophically, > would cause collateral damage. The main part you want to protec

Re: Larry Niven's Altair

I have had several similar personal experiences. Even in the face of extreme need, huge companies and major institutions sometimes can't find things you'd think should be at their fingertips. When you think about it from a historical point of view, it's actually pretty shocking. > On Aug 21, 2

Re: A tale of woe, including carelessness, stupidity and laziness....

On 8/22/2015 12:55 PM, Tapley, Mark wrote: > Jay, > this is a really great post. I feel really bad for you - having the > same piece of equipment go bang/flash more than once would have been totally > demoralizing to me - but I really admire both your tenacity and your > willingness to sh

Re: De-yellowing

On 08/22/2015 12:11 PM, Terry Stewart wrote: In my experience deyellowing is only temporary http://www.classic-computers.org.nz/blog/2013-01-15-retr0bright-only-temporary.htm It does make the cases look good for a while though. (: I can believe that the effect is only temporary--the action s

RE: De-yellowing

> I've never tried the stuff - but is it a permanent fix, or does the > yellowing gradually come back? It comes back. Search for retrobright on VCF. Tez has posted pictures of his experience. -Ali

Re: De-yellowing

>Has anyone tried ditching the peroxide and simply gone to using a solution of sodium percarbonate (e.g. "Oxyclean")? >Cheap and pretty shelf-stable in the powder form Yes, I have Chuck. http://www.classic-computers.org.nz/blog/2011-01-21-deyellowing-with-oxy-only.htm Sometimes it doesn't turn ou

Re: De-yellowing

All, the original page seems to be off line currently for retr0bright. Also, more current copies seem to be forbidden to be archived via robots.txt. Here is an older copy of the page that was available in the Waybac

Re: More on manuals plus rescue

Sean, Avaya for a while in the early to mid 2000's only made their manuals available to authorized resellers, that seems to have changed sometime after buying Nortel, all of the Avaya manuals, and the corresponding nortel ones became freely available online. Not sure I have the link anymo

Re: De-yellowing

On 08/22/2015 11:04 AM, Pete Turnbull wrote: Hydrogen peroxide *is* a bleach, as any chemist can tell you. Never heard of "peroxide blonde"? Has anyone tried ditching the peroxide and simply gone to using a solution of sodium percarbonate (e.g. "Oxyclean")? Cheap and pretty shelf-stable i

Re: 9-Track 1/2" Tape Drive Recommendations?

On 08/22/2015 10:07 AM, Jay Jaeger wrote: One other type: spring arm, where the tape reels do all the tape moving, and a speed sensor, rather than a traditional capstan. The tension arm is part of the servo system to which the reel motors respond. In this case the reel motors and tension arm

RE: De-yellowing

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Pete > Turnbull > Sent: 22 August 2015 19:05 > To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off- > Topic Posts > Subject: Re: De-yellowing > > On 22/08/2015 13:50, Tothwolf wrot

Re: De-yellowing

On 22/08/2015 13:50, Tothwolf wrote: On Sat, 22 Aug 2015, Dave G4UGM wrote: All the techniques discussed so far involve using a "bleach" of some kind and possibly UV light. Some use other materials so you have a gell which makes it easier to apply. From what I have read yellowing usually/often

Re: A tale of woe, including carelessness, stupidity and laziness....

Jay, this is a really great post. I feel really bad for you - having the same piece of equipment go bang/flash more than once would have been totally demoralizing to me - but I really admire both your tenacity and your willingness to share this with the rest of us. Thank you! Su

Re: 9-Track 1/2" Tape Drive Recommendations?

On 8/22/2015 5:32 AM, Brent Hilpert wrote: > On 2015-Aug-21, at 10:20 PM, Ali wrote: > > A brief conceptual overview: > > Vacuum-column and spring-arm drives comprise 3 servo systems: > - each reel motor is in a closed servo loop with position sensors in > its associated vacuum column or s

RE: Data I/O 29B

I'm confused that you couldn't find any info on these. I have a 29B with quite a few different attachments. These are about the best documented units I've seen. I probably have 3 or 4 inches of documentation (fairly sure it includes schematics), and at least 3 different versions of DOS programs tha

Silent 785 docs?

I've got a TI Silent 785 I'm trying to get configured/running. I see docs on bitsavers for the earlier models, but not anything in the 780 series and outwardly they do appear to be somewhat different than the 700 series. My google searches don't return joy either. I'm particularly looking for seria

Re: 5.25 floppies that read but don't write

Do we know the make/model of this drive? - Original Message - From: "Marc Verdiell" To: Sent: Saturday, August 22, 2015 12:50 AM Subject: RE: 5.25 floppies that read but don't write Chuck, I looked at the pin 2 signal and resulting drive behavior. It doesn't properly auto-switch

Re: 9-Track 1/2" Tape Drive Recommendations?

On 08/22/2015 12:20 AM, Ali wrote: Jon, Enough Pertec drives were made so that manuals should be no problem. Some other makes were made in fairly small numbers so manuals may be a problem. I should have been more clear - the manuals were for the ISA interface card and the accompanying SW not f

Looking for Vintage Gold Lead LEDs for SCELBI project

Hey everyone, I am looking for some vintage Gold-Lead clear LEDs that light up red for a Scelbi project I am working on for VCFMW. Will need 29 of them if you have them, willing to trade or buy them, thnx!! -Nick

Re: Data I/O 29B

On 08/21/2015 5:33 PM, Billy Pettit wrote: I have a small batch of Data I/O EPROM burners. Trying to test them out and ran into a nightmare. They require a pin family and size parameter. But in none of the documentation is there any mention of what these values are. There are some generic

Re: Update on SA-800 Problem

On 8/22/2015 12:20 AM, Chuck Guzis wrote: > On 08/21/2015 06:46 PM, Jay Jaeger wrote: > >> One other thing I have noticed is that sometimes after a read problem >> on the bad drive the FD 1791 floppy controller chip seems to get into >> a "snit" that even a reset does not cure - I have to cycle p

Re: HP 5480A, or, obscure HP instruments / was Re: More on manuals plus rescue

On 8/22/2015 8:14 AM, Tothwolf wrote: > > It only helps a little though and when eBay eliminated wildcard matching > awhile back, they also reduced the maximum query length. What I /really/ > don't like about eBay's current search system, is how it substitutes > keywords internally. If I search f

Re: Data I/O 29B

thats it. I hardly ever use the data IO unless i need to burn a bipolar prom i have anther prom programmer much newer that does everything except bipolar proms thanks rik been a while since i used it and forget the name On 8/22/2015 6:31 AM, Rik Bos wrote: > The software is pl.exe " promlink".

RE: De-yellowing

> > Within a museum context, where showing original factory condition is > probably a desirable thing, have there been any studies to ensure that > retrobright (or other treatments) don't cause any damage to the plastics > (e.g. making the surface less resistant to scratches, or the plastic more >

Re: De-yellowing

On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/22/2015 07:48 AM, Tothwolf wrote: On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/21/2015 05:28 PM, Evan Koblentz wrote: Google for "Retr0brite". I've never tried the stuff - but is it a permanent fix, or does the yellowing gradually co

RE: Data I/O 29B

The software is pl.exe " promlink". On the dataio yahoo group you can find the link and lots of info regarding data io equipment. I use it a lot for programming proms, like the HP 1000 boot proms. -Rik -Oorspronkelijk bericht- Van: "Noel Chiappa" Verzonden: ‎22-‎8-‎2015 15:17 Aan: "ccta

Re: Data I/O 29B

> From: wulfman > I have a modified dos program that talks to the data i/o > its the one that they sold with the unit but only ran on a 286 > ... > the modified one i have works in windows 7 in a dos box I seem to recall that I downloaded some software to run my 29B (although

Re: HP 5480A, or, obscure HP instruments / was Re: More on manuals plus rescue

On Thu, 20 Aug 2015, Jay Jaeger wrote: On 8/20/2015 7:11 AM, tony duell wrote: They reuse numbers for what I call "marketing numbers". For example, with a LaserJet 8150dn, the "8150" is a "marketing number" and not the actual HP product number, which was C4267A. As far as I know they've ne

Re: De-yellowing

On 08/22/2015 07:48 AM, Tothwolf wrote: On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/21/2015 05:28 PM, Evan Koblentz wrote: So, how does one de-yellow something? I have a VT-100 and some other gear that could use that process. Google for "Retr0brite". I've never tried the stuff - bu

RE: De-yellowing

On Sat, 22 Aug 2015, Dave G4UGM wrote: On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/21/2015 05:28 PM, Evan Koblentz wrote: So, how does one de-yellow something? I have a VT-100 and some other gear that could use that process. Google for "Retr0brite". I've never tried the stuff - but

Re: De-yellowing

On Sat, 22 Aug 2015, Jules Richardson wrote: On 08/21/2015 05:28 PM, Evan Koblentz wrote: So, how does one de-yellow something? I have a VT-100 and some other gear that could use that process. Google for "Retr0brite". I've never tried the stuff - but is it a permanent fix, or does the yel

RE: De-yellowing

> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Jules > Richardson > Sent: 22 August 2015 13:25 > To: gene...@classiccmp.org; discuss...@classiccmp.org:On-Topic and Off- > Topic Posts > Subject: Re: De-yellowing > > On 08/21/2015 05:28 PM, Evan Ko

Re: De-yellowing

On 08/21/2015 05:28 PM, Evan Koblentz wrote: So, how does one de-yellow something? I have a VT-100 and some other gear that could use that process. Google for "Retr0brite". I've never tried the stuff - but is it a permanent fix, or does the yellowing gradually come back?

(OT?) Copyright and IP

Hi List, This relates to the ongoing discussion about vintage computer software copyright. A year or so ago I did some Beta videotape backups for the Australian Computer Society. They're of keynote speeches at the 10th Australian Computer Conference in 1983. One that I'd like to mention is by Tan

Re: 9-Track 1/2" Tape Drive Recommendations?

On 2015-Aug-21, at 10:20 PM, Ali wrote: > Jon, > ... >> You have to decide, spring-arm, vacuum-column or streaming, and then >> most dual density drives were either 800/1600 or 1600/6250. Few would >> do all three. (Also there's 3200 BPI, identical to 1600 PE mode, just >> double the clock, but i

9-Track 1/2" Tape Drive Recommendations?

Hello All, Recently I came across a complete Pertec interface (card, manual, software, and, cables) thanks to list-member Shaun. Of course what is the point of having an interface if you have nothing to interface it to! So I've been looking at, and learning a bit, about 1/2" tape drives. I've al

Re: maybe OT: Powerbook 5300 OS upgrade

Joe, that's a good offer, you should take it :O Best, Sean On Fri, Aug 21, 2015 at 2:45 PM, Brent Hilpert wrote: > Yesterday I sent a power book 5300 to recycling. > The display hinge was quite broken, it was given to me a while ago and I > didn't see accomplishing anything with it. > > What'

Re: More on manuals plus rescue

In these times where income inequality in the USA is the worst it's been since the Gilded Age, I think a little bit of perspective is best used when dropping the term "meager income". If you've got pocket money for computer collecting, I don't think you get to make that claim. Best, Sean On Fr

Re: More on manuals plus rescue

Perhaps, but the eBay vendor also stole the manual from HP in the first place, as well as the profit generated in selling the copy. I don't think they have a lot of moral high ground ... Best, Sean On Fri, Aug 21, 2015 at 10:57 AM, Evan Koblentz wrote: > > Years ago I needed a HP service man

Re: More on manuals plus rescue

That's odd, as long as I can remember, Lucent/Avaya distributed the manuals at least for their PBX and key products pretty openly; Nortel tried to keep them more closely held but eventually relented, too. Carrier-grade stuff (i.e. 5ESS and SL-100/DMS-100) was always another story, of course. I don'

Re: maybe OT: Powerbook 5300 OS upgrade

Sorry, let me be more clear; if the machine already boots, you might be able to mount the installation CD-ROM using an Appletalk share over Localtalk. You can't actually net-boot the Powerbook from the Localtalk network. Best, Sean On Fri, Aug 21, 2015 at 10:55 AM, Sean Caron wrote: > Hi Joe,