[cctalk] Re: Computers in the Paul Allen collection

Anyone want to guess what the Xerox Alto will (should) sell for? 73 Eugene W2HX My Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: Paul Koning via cctalk Sent: Wednesday, August 21, 2024 3:25 PM To: cctalk@classiccmp.org Cc: Paul Koning Subject: [cctal

[cctalk] Re: Revocable Living Trust for Computer Collectors

None of our survivors will give a rats-arse about getting even a nickel for this stuff. All they will want is for it to be gone. They would probably even pay to have it carted away. So I don't think any economic analysis of how to dispose of a collection to maximize return is relevant. Sent

[cctalk] Re: teletype roll as an RF termination load

Yes I do rtty and I use mechanical equipment. Several of us use military standards and military equipment. I show some of this on my Youtube Channel which can be found at @w2hx Sent from Nine From: ben via cctalk Sent: Wednesday, Jun

[cctalk] Re: teletype roll as an RF termination load

"teletype rolls" what, like rolls of paper? They are not effective as dummy loads. Sent from Nine From: Fritz Mueller via cctalk Sent: Wednesday, June 12, 2024 6:56 PM To: General Discussion: On-Topic and Off-Topic Posts Cc: Fritz Muel

[cctalk] DEC Qbus/Massbus?

Was there ever a massbus controller card for qbus systems? 73 Eugene W2HX My Youtube Channel: https://www.youtube.com/@w2hx/videos

[cctalk] Re: 5,34 Petaflop System Cheyenne

cctalk Sent: Saturday, May 4, 2024 12:41 PM To: W2HX via cctalk Cc: Jon Elson Subject: [cctalk] Re: 5,34 Petaflop System Cheyenne On 5/4/24 10:21, W2HX via cctalk wrote: > I wonder how well that machine would do at bitcoin mining > Umm, it will consume about 4000 Dollars of electricity per day!

[cctalk] Re: 5,34 Petaflop System Cheyenne

I wonder how well that machine would do at bitcoin mining Sent from Nine From: CAREY SCHUG via cctalk Sent: Saturday, May 4, 2024 12:28 AM To: General Discussion: On-Topic and Off-Topic Posts Cc: CAREY SCHUG Subject: [cctalk] Re: 5,34 Pet

[cctalk] Re: 5,34 Petaflop System Cheyenne

Someone seems to want it. Bidding is at $250,000 and counting. I guess someone didn’t get the memo about getting just a few nvidia cards! 73 Eugene W2HX My Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: Gavin Scott via cctalk Sent: Friday, May 3, 2024

[cctalk] Re: PDP-11 thingy. What is it?

Thanks everyone! 73 Eugene W2HX My Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: Carlos E Murillo-Sanchez via cctalk Sent: Thursday, April 11, 2024 12:37 AM To: Glen Slick via cctalk Cc: Carlos E Murillo-Sanchez Subject: [cctalk] Re: PDP-11 thingy.

[cctalk] Re: PDP-11 thingy. What is it?

-Original Message- From: Glen Slick via cctalk Sent: Wednesday, April 10, 2024 7:44 PM To: General Discussion: On-Topic and Off-Topic Posts Cc: Glen Slick Subject: [cctalk] Re: PDP-11 thingy. What is it? On Wed, Apr 10, 2024, 4:14 PM W2HX via cctalk wrote: > Hi all, I picked up this

[cctalk] PDP-11 thingy. What is it?

Hi all, I picked up this PDP-11 thing. Can anyone help me understand what it is? Pictures are here: https://w2hx.com/?prefix=x/What-Is-It/PDP-11-Thing/ I could not find any designation on the backplane. It is a wire-wrappable backplane. I don't know if it is Qbus, unibus or whether it is 18 or 22

[cctalk] WAS: Amoeba OS, Now: VAX/VMS Licensing?

Hi all, I am completely ignorant when it comes to VMS licensing and how it works (or worked). I purchased a MicroVAX that is running VMS V5.3. Do I need to worry about it ceasing to work at some point? I don’t have any paperwork for the license, just a running machine. What should I know about

[cctalk] Re: How to shutdown RT11?

W2HX My Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: Bill Gunshannon via cctalk Sent: Thursday, March 21, 2024 9:23 PM To: W2HX via cctalk Cc: Bill Gunshannon Subject: [cctalk] Re: How to shutdown RT11? On 3/21/2024 9:19 PM, W2HX via cctalk wrote

[cctalk] How to shutdown RT11?

I just got a pdp-11 to boot and it seems to have rt-11 installed. How do I do an orderly shutdown? Google has info on simh but this ain't that. Thanks! 73 Eugene w2hx

[cctalk] Re: Decwriter III self test issue?

ue? Video removed... :-( Was looking forward to seeing how I could apply your work to my Decwriter. Lee On Fri, Mar 1, 2024 at 3:08 PM W2HX via cctalk wrote: > I thought I'd send a follow up that I have fixed the decwriter (whew)... > A little lube goes a long way! Vid below. > > h

[cctalk] Re: Decwriter III self test issue?

I thought I'd send a follow up that I have fixed the decwriter (whew)... A little lube goes a long way! Vid below. https://youtu.be/mJH3GPIvBvs 73 Eugene W2HX My Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: W2HX via cctalk Sent: Thursday, Feb

[cctalk] Decwriter III self test issue?

Hi all, I recently acquired a very nice decwriter III and it seems in good nick. However, the self test "hangs" on the return direction of the second line. Here is a video on it: https://youtu.be/pj6rk5Dlnbk Anyone have any ideas where to look? In local mode, it appears to work properly. I hav

[cctalk] Re: Silly question about S-100 and video monitors

rticle references it. With that, a TV, video board, RF modulator and a parallel keyboard were much cheaper than any serial terminal back then. The RF modulator was separate from the video board (usually hung on the back of the TV) for noise reasons. -Original Message- From: W2HX via

[cctalk] Silly question about S-100 and video monitors

Hi all, I recently acquired an S-100 computer, and it came with a video card and a keyboard (3rd party products, not originally equipped with these). I am trying to figure out the benefits of having a video card and keyboard vs just using a serial port and terminal. Certainly if the video card

[cctalk] Re: Logic Analyzers - HP/Agilent 16700B or 1670G?

Or this looks cool http://www.retrocmp.com/tools/qprobe/327-qprobe2023-overview 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: Martin Bishop via cctalk Sent: Sunday, August 20, 2023 4:42 PM To: General Discussion: On-Top

[cctalk] Re: Talking PDP11

And by 1979 there was the fairlight... https://en.wikipedia.org/wiki/Fairlight_CMI 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos >Speaking of old computerized music playing technology, there are two from the >PLATO system at the University of Illinois that

[cctalk] Re: Linotype and other printing machines available

What am I missing? I can't find any photos in the links provided. I can't even find a subdirectory called linotype under the temp directory? 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: Paul Koning via cctalk Sent: Mon

[cctalk] Re: Altair 8800 question

Hilpert Subject: [cctalk] Re: Altair 8800 question On 2023-May-09, at 11:08 AM, W2HX via cctalk wrote: > I see some altairs have a metal escutcheon on the bottom with the stylized > words "MITS ALTAIR 8800 COMPUTER" whereas others, the front panel is just the > dark faceplate top

[cctalk] Altair 8800 question

I see some altairs have a metal escutcheon on the bottom with the stylized words "MITS ALTAIR 8800 COMPUTER" whereas others, the front panel is just the dark faceplate top to bottom. What is the difference? Would one have been a kit and the other sold fully assembled? Or maybe later units vs ear

[cctalk] Re: DEC RL device

: Ethan Dicks ; Paul Koning Subject: [cctalk] Re: DEC RL device > On Apr 30, 2023, at 10:27 PM, Ethan Dicks via cctalk > wrote: > > On Sun, Apr 30, 2023 at 8:47 PM W2HX via cctalk wrote: >> Can anyone tell me what I picked up at a NH hamfest this weekend for $20? I >&g

[cctalk] DEC RL device

Can anyone tell me what I picked up at a NH hamfest this weekend for $20? I see it says RL01/RL02. I have two RL02 drives and some platters. None of which I have gotten around to trying. Other than a copious amount of pine needles, what can this be used for? Or maybe the right question is, shoul

[cctalk] Re: flipchip cleaning and pin corrosion inhibition

I might be concerned about putting carbon comp resistors in the dishwasher as they are hygroscopic. From an Ohmite datasheet: https://www.mouser.com/datasheet/2/303/res_od_of_oa-180619.pdf "Carbon composition resistors are highly hygroscopic and changes in resistance value can occur if too muc

[cctalk] Re: VCF East 2023 photos

Links are working now. Maybe a problem on my side, or maybe there were fixed. But thanks again for posting this 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message- From: W2HX via cctalk Sent: Monday, April 17, 2023 1:52 PM To

[cctalk] Re: VCF East 2023 photos

Thanks for taking the time to document the show. I went to the link provided and only PART 1 and PART 6 link to other pages. Are parts 2-5 just not written yet? Or a bug in the html? 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos -Original Message---

[cctalk] Re: mainframe vs mini

>I remember when the internet and e-mail became all the rage in the late 1990s, >everything was eThis and eThat. And when Apple coined the iPhone, everything >started to become iThis and iThat. The "i" thing predated apple's use of it and certainly predated the iphone. Internet services o

[cctalk] Re: mainframe vs mini

Yes I can concur with this. I operate some Navy transmitters (at home) and while on the vessel they used 3 phase power supplies which were physically smaller and produced less ripple. At home, I use a 1 phase power supply just fine. These were 1KW output (4KW input) transmitters so not a lot of

[cctalk] Re: on the origin of home computers

I loved it. I would only suggest a human narrator like your daughter would be great. But I don't like the computer generated narration (I am right about the computer narrator, aren't I?). -Original Message- From: Steve Lewis via cctalk Sent: Wednesday, March 8, 2023 11:54 AM To: Gener

[cctalk] Re: Inline Serial Device?

bject: [cctalk] Re: Inline Serial Device? Can the magic control codes pass through to the remote device or does the "black box" have to eat them? Makes quite a difference... m On Fri, Nov 11, 2022 at 5:14 PM W2HX via cctalk wrote: > Thanks to everyone who responded. And thanks t

[cctalk] Re: Inline Serial Device?

Thanks to everyone who responded. And thanks to Wayne for the black box suggestion. I have actually been thinking about that very product. What it does is switch a master port to one of several other ports. Not far from what I'm seeking. I was thinking of buying one of these and hacking it to tr

[cctalk] Inline Serial Device?

Hello all, I am looking for a device that sits transparently in an RS-232 serial line and upon seeing a particular code go over the serial line ((or sequence of codes) will actual a relay (or a transistor). Something with two DB25s or DE9s and is configurable to what code will trigger the outpu

[cctalk] Re: Soviet PDP clones

This is an excellent video on the history of Soviet computing and the causes of their lagging behind the west. I cannot comment on the accuracy since I am no expert in this subject. But a very interesting and informative video. https://www.youtube.com/watch?v=dnHdqPBrtH8 73 Eugene W2HX Subscri

[cctalk] Re: Wang bar napkin story [WAS:RE: Re: "Revival" of a dedicated Micropolis webpage on internet]

I always thought it was interesting how 5 1/4 is 3U (rack units). I thought there might have been some relationship to that. But could have been just coincidence. 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos -Original Message- From: Tom

[cctalk] Re: Dec rl02 disk pack shelf design

I have one that looks slightly different than the one shown earlier https://w2hx.com/?prefix=x/VintageComp/RL-Drives/ But I could use one or two more, so add me to the list of prospects. Were there larger cabinets designed to hold these? I can imagine some operations having dozens of these disk p

[cctalk] Re: VT220 North of Boston

: VT220 North of Boston Looks like both of them are North of Boston, but one is like a 19 hour drive away and one is a half hour drive away. I'd guess the half hour one. :D -Paul > On Aug 8, 2022, at 3:55 PM, W2HX via cctalk wrote: > > North Andover, MA or North Andover WI?

[cctalk] Re: VT220 North of Boston

North Andover, MA or North Andover WI? 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos -Original Message- From: Dave Mitton via cctalk Sent: Saturday, August 6, 2022 10:34 PM To: cctalk@classiccmp.org Cc: Dave Mitton Subject: [cctalk] VT2

[cctalk] Re: BBS memorabilia

>“yellow pages” Do you recall what this was called? I remember (vaguely) something called the "Yanoff List" which was an attempt at a paper catalog of websites. 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos -Original Message- From: Ryan

RE: new Z80 monitor ROM works with no RAM

Dang! That Z80 computer looks AWESOME. Is there a website that talks about it? Is this a homebrew project or something he plans to make available as a kit? 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos -Original Message- From: cctalk On

RE: Advice on Desoldering an IC

Indeed! Great investment. 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos -Original Message- From: cctalk On Behalf Of Rob Jarratt via cctalk Sent: Friday, April 22, 2022 2:04 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subje

RE: Advice on Desoldering an IC

Just be careful around cerroblend. According to Wikipedia... "... is a metal alloy that is useful for soldering and making custom metal parts, but which is toxic to touch or breathe vapors from." "...is toxic because it contains lead and cadmium, and contamination of bare skin is considered har

RE: Advice on Desoldering an IC

I would not attempt any desoldering without my hakko 808. I never leave home with out it. While you are sucking and heating the pin, wiggle the pin and it work great. I've desoldered 40 pin chips without trouble, they drop right out of the board. I desoldered this 40 pin chip from a working devi

RE: Retro networking / WAN communities

I could be wrong, but I always thought the distinction between hub and bridge was, all traffic is broadcast to all ports on a hub. A bridge allows traffic to be segregated (albeit still on the same subnet). 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/v

RE: Retro networking / WAN communities

Internet message processor (BBN I think) 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos -Original Message- From: cctech On Behalf Of Wayne S via cctech Sent: Tuesday, April 12, 2022 1:24 PM To: Grant Taylor Cc: General Discussion: On-Topi

RE: LSSM is chasing this, was Re: General Data? Computer

> For a number of years they had on display the world's oldest broadcast > transmitter, an FM transmitter from 1919 invented in The Hague by Hanso > Idzerda. Interesting as that would have predated the invention of FM by Edwin Howard Armstrong in 1933 (or at least what we thought was the inve

RE: Found! Ge 115 computer brochure

Btw I have since resent the message with a link to the .jpg but I don't think it has come through. I suspect both images and links may be verboten on this list. Ironic considering the advanced technical proclivities of the membership! 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.y

RE: Found! Ge 115 computer brochure

Well, I made the error thinking an email reflector full of very high tech people (discussing vintage computers) would not support attached images in 2021. Ok, so here is the picture as a link. I'll be curious to see if this reflector allows links or strips them. https://w2hx.com/x/TTY/Art/Dutch

RE: Found! Ge 115 computer brochure

Here is some Baudot Art. Hot off the model 28 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos -Original Message- From: cctalk On Behalf Of Fred Cisin via cctalk Sent: Sunday, March 13, 2022 5:33 PM To: General Discussion: On-Topic and Off-T

RE: Rack Discussion Continued - Slide lubricant

> then grease them with light, white lithium grease. Fully agree! 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos

RE: Testing H745 Regulators

Any chance you have a second supply you can parallel with the one you're using? Some bench supplies are dual supplies and have a parallel mode so you can benefit from both sides of the supply and they can track the same voltage. Or just put two supplies in parallel with the same voltage set on b

RE: DEC 3000/600 Alphaserver problems

A bad tant will show 0V across it and it will show 0V (or very close to it) across all the other tants used as filter caps on that same rail. I would turn it back on and measure all of your rails. See which is affected. Then pull out every card in the system that uses that rail (probably all car

RE: Source for replacement caps in H744 regulators

My 2c. I am not familiar with a "whine" but certainly a "hum." Sometimes if a power supply has seen a lot of heavy load over its lifetime, the heat generated can begin to do things to the transformer. And once that heat has done its "thing" to the transformer, it stays that way. And no replacing

RE: Apple I auction

Anyone know what this sold for? 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos -Original Message- From: cctalk On Behalf Of s shumaker via cctalk Sent: Friday, October 22, 2021 9:07 PM To: General Discussion: On-Topic and Off-Topic Posts

RE: VAX 780 on eBay

The other benefit to 3phase power to something like a computer is that the filter caps required can be much smaller. Once you rectify three phases 60* you get MUCH less ripple because every 60 degrees you have a new peak arriving. When you have a real gas (electron) guzzler like one of these, DC

RE: VAX 780 on eBay

> True. But if you're trying to get > $5000 for something, it doesn't seem unreasonable to suggest that investing a bit in getting an extension cord run to the location of the machine would be a good idea. The absence of that effort makes me wonder if the owner knows what the outcome of such a

RE: DEC PDP-8/e Omnibus backplane lubrication

Ok, good article. From what I read, there are some things it doesn’t do. Author states "What it will not do. IT WILL NOT REMOVE RUST. IT WILL NOT REMOVE OXIDATION" cool beans. He also states that it isn’t as good as military products for aluminum salt fog. I hope the Op wasn’t planning to use

RE: DEC PDP-8/e Omnibus backplane lubrication

Very interesting. In probably 30 years I've been repairing equipment and among the dozen or so electronics forums I belong to, you may be the first person I've run across to throw some shade on that product. I've never heard any concerns or warnings about it. And there are some rather reputable

RE: DEC PDP-8/e Omnibus backplane lubrication

I would use caig deoxit. They have a version that has lubrication properties. I think it is the "S" series. Eugene -Original Message- From: cctalk On Behalf Of Tom Hunter via cctalk Sent: Monday, May 10, 2021 11:14 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: DEC PD

RE: 400 Hz

I will add that aircraft are one of the main users of 400 Hz. This is because weight is always an critical design consideration. So with smaller transformers, smaller capacitors, etc, you can save a LOT of weight on electronic devices in an aircraft. 73 Eugene W2HX -Original Message- F

RE: cctalk Digest, Vol 76, Issue 29

> I can still count quite rapidly up to 31 on one hand (either one). That is a neat trick. I have a hard time counting to 21 unless I take off my pants. 73 Eugene W2HX -Original Message- From: cctalk On Behalf Of Mark Moulding via cctalk Sent: Saturday, January 30, 2021 3:45 PM To:

RE: Apple 1 and memorabilia up for auction in Boston (NOT on Epay)

What am I missing? The picture shown on RR auctions shows the board with no chips? -Original Message- From: cctalk On Behalf Of Adrian Stoness via cctalk Sent: Thursday, December 10, 2020 10:32 PM To: Ali ; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Apple 1 and memo

neat VGA tester

For you folks that work on machines with VGA monitors. https://www.mpja.com/11-16-20.asp?r=344017&s=2 I don't own one but it seemed interesting enough to pass on. 73 Eugene W2HX

RE: Soldering DB connectors

Crimp pins 100%! -Original Message- From: cctalk On Behalf Of Chuck Guzis via cctalk Sent: Wednesday, November 11, 2020 8:11 PM To: dwight via cctalk Subject: Re: Soldering DB connectors On 11/11/20 2:19 PM, dwight via cctalk wrote: > I've not had issues just soldering the wires on. I'

RE: [HECnet] RSTS/E patches

Are these patches discussed below only for patching SIMH to fix problems with it? Or are these fixes that are for actual PDP hardware implementations of RSTS? -Original Message- From: cctalk On Behalf Of Tony Nicholson via cctalk Sent: Monday, September 14, 2020 6:10 PM To: hec...@updat

article on TRS-80 in Nuts and Volts

Don't know if anyone gets/reads this old rag but I thought I'd share an article I came across: https://www.nutsvolts.com/magazine/article/the-trs-80-model-1 73 Eugene W2HX

VAX 11-780 Rack Available

Hi friends. This rack is available for free. I am located in 10510 happy to drive, up to say 1.5 hours to meet up to transfer vehicles? https://w2hx.com/ForSale/DEC%20Rack/20200719_114742.jpg https://w2hx.com/ForSale/DEC%20Rack/20200719_114751.jpg it is in very nice condition. Comes with wheels

RE: IDE-SD adapter question

; General Discussion: On-Topic and Off-Topic Posts Cc: cct...@classiccmp.org Subject: Re: IDE-SD adapter question Hi Eugene, On Fri, Jun 26, 2020 at 09:39:57PM +0000, W2HX via cctalk wrote: > Hi all, > However, I do get errors "sector not found" and if I A)bort I get INT 24 &g

RE: IDE-SD adapter question

Peter and Maciej. Thank you very much for the input. I don't believe this BIOS supports anything other than CHS. At least I don't see a way to toggle between CHS and LBA. Is this what I should be looking for? An option to enable LBA mode? I am not opposed to going to CF, but I have no other comp

RE: IDE-SD adapter question

Could it be related to the fact that it is a 2GB SD card and I believe IDE controllers of that day could only address something like 500MB? Should I consider trying to partition the SD card into a 500MB partition? Eugene From: Richard Cini Sent: Friday, June 26, 2020 6:08 PM To: W2HX ; Genera

IDE-SD adapter question

Hi all, Thanks for previous help on this project. I am working on an old 486 computer and I have replaced a 40 pin IDE hard drive with this SD adapter... https://www.amazon.com/gp/product/B07G29TZPS/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 In general it seems to mostly be working. I can

RE: IDE Hard Drive Question

Thank you EVERYONE. Yes I confirmed that the red disc is a heater and the little device on the side is a temp sensor. All is good. I will send a new email out with some new questions but wanted to tie off this discussion with thanks to all Eugene -Original Message- From: cctalk On Be

IDE Hard Drive Question

Hi friends, Sorry for the long email that follows: I am working with an old military PC model SAIC V2LC. The PC is a 486 and is from around 1992 give or take a couple of years. Probably 1995 latest. The computer has one 3.5" floppy and a removable IDE hard drive in a removable carrier. It also

RE: State of New Jersey needs COBOL programmers

Not sure about that. I worked for Pershing in Jersey City around that time. They were (are?) a clearing house for tens of millions of dollars' worth of stock and bond trades every day. Lots of cobol to be remediated still in 1999. Oh, and I also worked on decimalization (stocks used to be traded

Re: First Internet message

software is currently non-patentable. Not sure the order of when it was/wasnt but currently is not. From: cctalk on behalf of Paul Koning via cctalk Sent: Thursday, December 26, 2019 5:09 PM To: Fred Cisin; General Discussion: On-Topic and Off-Topic Pos

Re: DEC KA650 VAX memory troubleshooting

Wow. Very nicely done! Which logic analyzer did you use to capture those displays? 73 Eugene W2HX From: cctalk on behalf of Joseph Zatarski via cctalk Sent: Sunday, November 24, 2019 1:28 AM To: General Discussion: On-Topic Posts Subject: Re: DEC KA650

Re: UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

Is the BBB not fast enough to do Qbus? Meaning, for qbus, would a FPGA be necessary? Or was this just the op's choice among many possible options? It does seem useful to have this thing run linux and ethernet and be able to pass files (data and programs) back and forth very easily. the FPGA app

Re: UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

hams amongst us de Nigel ve3id On 15/11/2019 15:23, David Bridgham via cctalk wrote: > On 11/15/19 3:01 PM, W2HX via cctalk wrote: >> LOVE the ideas, loved it when I first heard of it. But I'm a QBUS guy! Put >> me on the list when (if) you ever make one for qbus. GREAT idea! >&g

Re: UniBone: Linux-to-DEC-UNIBUS-bridge, year #1

LOVE the ideas, loved it when I first heard of it. But I'm a QBUS guy! Put me on the list when (if) you ever make one for qbus. GREAT idea! Eugene From: cctalk on behalf of Jörg Hoppe via cctalk Sent: Friday, November 15, 2019 8:07 AM To: General Discus

Re: TRS-80 Fireworks

Be sure to read this article. The caps used in this capacity (pun intended) are specialized... https://www.allaboutcircuits.com/technical-articles/safety-capacitor-class-x-and-class-y-capacitors/ From: cctalk on behalf of Marvin Johnston via cctalk Se

Re: Pertec Interface Cable Length

>All of my Pertec tape drives (in the past) were located in a differentrack from the actual computer so the cables were always over 10' long and usually close to if not 20'. Never had a problem. That is because a) you had the proper termination in place and b) the signalling speed of the inter

Re: Pertec Interface Cable Length

>Would folding the excess cable up and covering with anti-static plastic help? unlikely. The typical problem is that the longer the cable, the higher the capacitance of the transmission line. Therefore you get a lot of problems with rising and trailing edges of the signals which can cause all k

Re: DEC MS630/M7609 Question

Thanks, Lyle. I was reading this. I guess its wrong? https://en.wikipedia.org/wiki/MicroVAX The MS630 memory expansion module was used for expanding memory capacity. Four variants of the MS630 existed: the 1 MB MS630-AA, 2 MB MS630-BA, 4 MB MS630-BB and the 16MB MS630-CA. Wouldn't be the firs

DEC MS630/M7609 Question

Hi there. I just acquired a board with the number M7609. It was advertised as an M630-CA which my research tells me is supposed to be 16MB. How do I tell on the board if this is 8MB or 16MB? There does not seem to be a suffix on the board that I can see. What to look for? 73 Eugene W2HX

RL01 Platter Removal?

?Hi all, I have a crashed RL01 disk (very crashed). I'd like to remove it from the plastic cover to display it. I opened up the case but cannot figure out how to remove the platter? I took 4 philips screws out which only served to remove a metal ring. It seems that the handle is somehow atta

Re: Uniprobe

I hope the creator of the uniprobe will someday create a Q probe! From: cctalk on behalf of Jim Manley via cctalk Sent: Saturday, June 1, 2019 2:35 AM To: marc.how...@ieee.org; Marc Howard; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Un

Re: 11/93 Rebuild

I would love it if anyone on this list who maintains a wiki for PDP-11's could collect all of the various methods and instructions. I am still far from ready to do things like this (moving images to a PDP) but it is in my future. I could go through all the emails in the archive on the subject (t

RE: apollo psa test point adaptor

21, 2019 at 12:31 PM W2HX via cctalk wrote: > > > >BTW I got my Apollo IRIG at the same auction that Adrian got the Apollo PSA > >tester from. > > Wow, didn't know that NASA had testers for prostate specific antigen! They use them when exploring Uranus.

Re: apollo psa test point adaptor

>BTW I got my Apollo IRIG at the same auction that Adrian got the Apollo PSA >tester from. Wow, didn't know that NASA had testers for prostate specific antigen!

Re: DEC disc pack inspection unit on eBay

What is this used for? RL02's or something? and what does it do? From: cctalk on behalf of Bob Rosenbloom via cctalk Sent: Friday, May 10, 2019 1:49 AM To: cctalk Subject: DEC disc pack inspection unit on eBay There's a mis-categorized disk pack inspect

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

>>But plain old flat straight ribbon cable in a 10" length will do for the 2444; even at 6250, frequencies aren't much higher than 1MH Sounds like I might be ok. Except mine are 10 feet not inches! I guess I'll just have to try them out. Thanks everyone!

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

Oh, oops. That went completely over my head. I missed that detail entirely. We'll keep our fingers crossed that this will work :( 73 Eugene W2HX -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Dennis Boone via cctalk Sent: Wednesday, May 01, 2019 9:

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

ugene W2HX -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Glen Slick via cctalk Sent: Tuesday, March 19, 2019 12:41 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Fujitsi 2444AC 9-track tape drive/PDP-11 On Mon, Mar 18, 2019 at 8:35 P

PDP-11/83 w/FPU?

?Hi friends. I am putting together a PDP-11 set up. i have a few CPUs available to me, a 11/23+, an 11/73 and I also have available to me an 11/83, M8190-AE . I would like to try to run as many different OS's as may interest me, including some unixes as possible (bsd...etc). My question is, ar

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

omise. From: cctalk on behalf of Glen Slick via cctalk Sent: Thursday, April 11, 2019 9:10 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Fujitsi 2444AC 9-track tape drive/PDP-11 On Thu, Apr 11, 2019 at 5:55 PM W2HX via cctalk

Re: Control Console, but not PDP-10

And don't forget about the 25% buyer's premium! Wow From: cctalk on behalf of Ethan Dicks via cctalk Sent: Friday, April 12, 2019 1:59 AM To: Paul Birkel; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Control Console, but not PDP-10 On Fr

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

-track tape drive/PDP-11 On Mon, Mar 18, 2019 at 8:35 PM W2HX via cctalk wrote: > > Now for some questions. > > 1. I've been told the QT13 is a very good card to interface here. I've > been looking for a while on ebay without luck. I do see a QT14 on ebay right >

Re: TeleVideo's MmmOST

fascinatingly advanced for 1981. From: cctalk on behalf of Patrick Finnegan via cctalk Sent: Wednesday, April 10, 2019 4:50 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: TeleVideo's MmmOST I've been adding a few more blog posts, and p

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