test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jnc＠mercury.lcs.mit.edu

> From: Paul Anderson > A 9 can be converted to a 7 with a head change and I thing a board > change or removal. Yeah, the M768 module contains configurable diode arrays to control certain operational delays, which are different between the two - one can either change out the M768, or modify the existing one by adding/removing jumpers. > I recall having a TU10 7 track here somewhere. If it turns up, maybe someone with a 9-track drive could convert it to 7-track. Noel

9 years, 4 months

Value of 7-track TU10

by jnc＠mercury.lcs.mit.edu

> From: William Degnan > I found the doc somewhere months ago sorry I can't remember where. I > will upload to my site if I get a free moment and it's still on my > computer. Thanks; that would be great. I already did find online the TU10 Maintenance Manual (EK-TU10-MM-007), the TU10M Master System Manual (DEC-00-TU10M-D), and the TU10 Engineering Drawings, so we're pretty well set for these drives, but it would be good to have DEC-00-TU10S-DC too. > $2000 if clean. Wow. I saw a pair of H960's, a pair of CDC 92185 tape drives, 3 Fuji MiniEagles and an 11/23 go for $1.5K on eBait recently: http://www.ebay.com/itm/161928600660 Now, those are streaming drives, not vacuum column, but still - why is the TU10 worth so much more? > Master unit double that price. I find this even harder to understand. The only difference between the two is that the Master has 7 dual Flip Chips (M640, M891, M7673, M7672, M892, M895, M7671) and 3 single Flip Chips (M100, M896, M958) that the Slave doesn't have. (The backplane is, as far as I can tell, wired for both - the wire list given in the prints is for the master, and I don't see a second Slave-only wire-list. Yes, perhaps some early Slave drives had a Slave-only backplane, but that's just a guess. If someone who has a Slave drive can check their backplane to see if slots 6-15 are wired, that would be very useful to know.) Yes, the full set of 10 Flips Chips would be hard to find, but I have a hard time seeing them being worth $200 each... Noel

9 years, 4 months

Value of 7-track TU10

by jnc＠mercury.lcs.mit.edu

So what do people think the (monetary) value of a 7-track TU10 master drive is? I have no idea what these older vacuum-column drives are worth - don't recall ever seeing on for sale. This one is in good condition, and has all its Flip Chips. The 7-track is a plus in some ways (rarer), and negative in others (can't read old 9-track tapes, which are probably more common than 7-track). Noel

9 years, 4 months

Reminder: VCF Berlin, 1–3 October 2016

by stueberahoo＠yahoo.de

Hi list, VCF Berlin[0] is coming soon! We'll have a day open only for participants and other collectors on Saturday, 1st of October. On Sunday, 2nd and Monday, 3rd of October we'll be open to the general public (3rd of October is a holiday in Germany). Entry is free on all days. Apart from exhibitions there will be lectures, soldering workshops, a chiptune party and many other things. Come and visit us! Sorry this reminder is so late, I was hoping for the English version of the website to get updated, which hasn't happened yet. Please refer to a translation[1] of the German version for more information instead. Although all but one talk will be given in German, most of the exhibitors can speak English, so VCFB is worth a visit even if you don't speak any German. In case you need somewhere to stay, we can probably find a place for you. Hope to see you at VCFB! Best, Anke [0] http://vcfb.de/2016/index.html.en [1] https://translate.google.com/translate?sl=de&tl=en&hl=en&ie=UTF-8&u= http://vcfb.de/2016/index.html

9 years, 4 months

Value of 7-track TU10

by jnc＠mercury.lcs.mit.edu

> From: Doug Ingraham > Put it up on EBAY with an unrealistic reserve ... What controller do > you have for it? None. I don't own either the drive, or a controller for it. Noel

9 years, 4 months

Value of 7-track TU10

by jnc＠mercury.lcs.mit.edu

> From: William Degnan >> a 7-track TU10 master > What is the model number of the TU10? The serial number plate just says "TU10"; and it's not in its original DEC rack, so any label/plate there is no longer available. But the front door says "TU10 7 CHANNEL", and the head shows 7 tracks (since someone might have changed the head, and not been able to replace the door). > The presence of the TU10M label along with a separate TU10 label plate > means the tape has the the master transport unit installed. I prefer to actually check the Flip Chips, since one ought to do that anyway to make sure they are all there (hence my previous description of it as a "TU10 master drive ... [which] has all its Flip Chips"). (There's a list here: http://gunkies.org/wiki/TU10 including locations, if anyone ever needs it.) > Hopefully this will compare with the unit you're interested in and > assist with your assessment. I am perfectly capable of assessing the technical situation from the technical documentation (which is available), and have already done so. What I really need is some idea of its value (I haven't a clue). I am aware that its exact configuration and condition will affect the value, but I thought "a 7-track TU10 master drive .. in good condition, [with] all its Flip Chips" would be enough to get to the ball-park. > See DEC-00-TU10S-DC I had previously looked online for that, but was unable to find a copy. Can you point me at one? Thanks. > more diffs 7 vs, 9 track AFAICT, the only significant difference is the head; the Flip Chip suite is the same for both, since the per-channel boards are all 9-track, and simply leave the last two bits disconnected when used with a 7-track head (see e.g. drawing # TU10-0-09, note "9 Track Only"). Of course, the drive has to be able to say (to the controller) whether it's a 7-track or 9-track. Drawing # TU10-0-07 shows (center) an incoming signal on pin AJ1 of the M514 board (slot 21) called "7 CH", that signal is intended to ground the input, so there's a jumper to ground on the backplane to indicate 7/9 (A21C2, per the MM, Appendix A.5). Noel

9 years, 4 months

Value of 7-track TU10

by jnc＠mercury.lcs.mit.edu

> From: William Degnan >> the (monetary) value of a 7-track TU10 master drive ^^^^^^ > Is there a thread with more details? No. > I assume this is a master drive See above. > the cards installed indicate whether it came from a pdp 8/9/10/11. AFAIK, all PDP-10 TU10's are Slaves. TU10's used on an -11 need a Master and Slaves, I don't know if the ones for an -8 are the same. The TU10 prints don't seem to indicate that there is more than one type of Slaveax, and similarly for the Masters - there is just the one type of each. This one is from an -11, though. > How is the power supply? No idea. And no idea about the condition of the motors, compressor, etc, etc, etc. Like I said, this one "is in good condition", from a purely external inspection. Noel

9 years, 4 months

Linux at 25

by c.murray.mccullough＠gmail.com

Linux at 25 - created 25 years ago. Has it changed computing or is it 'better' than WIN or MacOS? Not really part of classic computing world but nonetheless it can be used today in emulators. ( I use it for ADAM emulating. ) Happy computing! Murray :)

9 years, 4 months

pictures of IBM 6110344 and 6110345

by sales＠elecplus.com

I am getting 3 of these ready for sale, and all but 1 of the online pics I see of the boards do NOT have a PA3 or a NumLock key. Does anyone here have a good high res pic of these 2 complete keyboards, so that I can know what is supposed to be on there? Many thanks! Cindy Croxton

9 years, 4 months

G4 cube (was Re: 68K Macs with MacOS 7.5 still in production use...)

by rlloken＠telus.net

On Mon, 12 Sep 2016, Al Kossow wrote: > Put it this way. The product manager for the cube was the first person > I know of who had one as a kleenex dispenser. It was a failed industrial > design experiment that never should have shipped and even he felt that > way. And now they have the mac pro which looks like a very elegant $3,000.00 can of tomato juice. Not much changes. Meanwhile, I am on my second mac Mini (third if you count my wife's) because i really like the mac mini so I probably would have bought the cube if I had been in the market for a mac at that time. -- Richard Loken VE6BSV, Systems Programmer - VMS : "...underneath those Athabasca University : tuques we wear, our Athabasca, Alberta Canada : heads are naked!" ** rlloken at telus.net ** : - Arthur Black

9 years, 4 months

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