test-drb May 2015

test-drb@ccmp.vtda.org

199 participants
259 discussions

by jnc＠mercury.lcs.mit.edu

> From: Todd Goodman > There aren't many deals to be found on eBay anymore (IMNSHO anyway) for > vintage computer gear. Test equipment is a different story. Well, it still does happen occasionally. Someone (no idea who) recently got a really nice BA11-S for only $80 (admittedly, in part because I was confused about the closing time, and missed that auction :-). Although I guess "occasionally" is pretty much the same as "not many", so I guess you're right. If people are willing to buy lots (i.e. N things in a group), you can also get good deals. E.g. I know of recent lot that included 4 11/73 CPU cards; it turned out that although only one worked straight off, the J11 chips on the other three were all good - and the whole lot (including a bunch of other boards, all working) was only like $250. Noel

9 years, 2 months

Visual Basic Question

by dj.taylor4＠verizon.net

I have a software driver for an old scientific instrument that is described in a brief manual this way: "The acquisition driver is a tool that allows developers to write their own Windows based programs that can acquire data from any Michelson series spectrometer. The programs can be developed with any programming environment that supports calling standard Windows 16bit DLLs. Examples of such environments are Visual Basic and Visual C++ from Microsoft ( up to version 1.5 ), Delphi and C++ >from Borland, Labview from National instruments. This document assumes that the reader is familiar with all the concepts surrounding DLLs and Windows programming. It is a reference guide that explains the parameters of the functions that make up the Bomem acquisition driver and how they are used to acquire data." I recently purchased Visual Basic 4.0 Standard Edition, but the first pages of the reference indicate that it is a 32 bit only version. Which version of Visual Basic will allow me to call this driver?

9 years, 2 months

Multibus extenders?

by silvercreekvalley＠yahoo.com

Hi I?m trying to find a multibus extender card. I?ve seen a few for sale new, but they are a bit too pricey for me. Anyone know a good source or have an old extender for sale? Thanks.

9 years, 2 months

Burroughs B1900 for sale in North Carolina

by jnc＠mercury.lcs.mit.edu

> On 4/14/15 2:07 AM, Nigel Williams wrote: >> I hope someone is able to rescue this system For those who were interested in this thing's fate, I just picked it up, and it's sitting safely in my garage, waiting for the new owner to arrange shipping. It's in really good shape inside (unlike my rodent 11/34's :-), and the cards look like they are all there. (If anyone's particularly interested in this machine, email me - _not the list_! - and I'll send you a copy of my detailed report to the new owner on its condition.) > From: Al Kossow > There are a couple of obvious things missing, like the cold-start > cassette Actually, there _is_ one of those there, still in the casette drive. Not sure how good a shape it's in after this long (or the casette drive, for that matter), but... > and any disk drives. Oddly enough, the seller did have two Burroughs packs (4 platter, I think). Not sure if they are from this machine, or what's on them - or how one would ever find a drive to read them on! > dumps of the tapes would be a good thing Alas, the tapes appear to be un-connected to the machine. Noel

9 years, 2 months

IBM 5120-troubles removing card cage

by supervinx＠libero.it

Hi! I feel a bit stupid, since I tore apart a lot of machines so I should be able to remove the card cage... but... I removed back covers and the two screws which hold the cage in place. I pulled gently the card, and I encountered a fair amount of resistance. Looking into the chassis (there's a hole under the cathodic tube) I noticed that the yellow flat cable (coming from the power section) blocked the cage on the left. Freed the cage I couldn't extract it completely, since the cage fan cable and a semitransparent flat cable (both disappearing internally, can't say where by now) are very short. I was barely able to remove the cage metal top cover. The semitransparent flat cable starts from the I/O Cable Driver card in the "A" position... Am I missing something? The manual has images of the card cage fully extracted still connected to the cables, but I wasn't able to do this. Thanks! -- Vincenzo (aka Supervinx) --==ooOoo==-- My computer collection: http://www.supervinx.com/OnlineMuseum --==ooOoo==-- You can reach me at: www.supervinx.com www.facebook.com/supervinx http://www.youtube.com/user/supervinx http://www.myspace.com/supervinx

9 years, 2 months

Burroughs B1900 for sale in North Carolina

by jnc＠mercury.lcs.mit.edu

> From: Nigel Williams > Do any of the tape labels suggest original distribution media? if so > would you be willing to share some of the descriptions please. None of the tapes have descriptive labels; all have only large labels with 4-digit numbers. In other words, they look like somsone's data tapes. One has a label from the Durham Insurance Company; a letter (which I found in the base of one of the cardboard boxes which held the tapes) is from the North Carolina Department of Public Instruction, and says that they received a "gift of a large number of used magnetic tapes" from that company, which they are handing out for free. Like I said, the tapes are useless. Noel

9 years, 2 months

FREE FOR SHIPPING or LOCAL PICK UP: P133 DOS Gaming Machine

by slandon110＠gmail.com

Just clearing out stuff this spring. P133 Machine 16MB RAM 2GB HD 5.25 inch FDD- 360KB 3.5in FDD 1.44mb Has Windows 95 installed on it and a Voodoo 2 Card in it. Used to be my DOS Gaming machine, but ive since replaced it with another machine. Was given to me, So its Free for the cost of shipping to anyone who wants it, Or wants to come pick it up in Farwell Michigan Steve

9 years, 2 months

M9301-YB Bootstrap/Terminator ROM dumps / listings?

by jnc＠mercury.lcs.mit.edu

> From: Jorg Hoppe >> Much of the M9312 ... was quite different [from the M9301] > ... here is the commented source code of all M9312 bootloaders. > ... > Very likely the actual PDP-11 code is identical to M9301 Err.... :-) Noel

9 years, 2 months

M9301-YB Bootstrap/Terminator ROM dumps / listings?

by jnc＠mercury.lcs.mit.edu

> From: Jorg Hoppe >> Here's what I have so far: >> http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/M9301-YA.mac > Thanks for that effort! Eh, de nada. Interesting and educational. > The M9312 code should be similar, at least it may expose some ideas Some parts of it (e.g. the CPU diagnostic) are mostly identical (and the comments there, particularly on the single-op register instructions, are useful to total understanding of that code in the M9301); but alas, I had already done that part of the M9301 (at least, at a surface level)! Much of the M9312 (including the functionality of most of what I had yet to read in the M9301) was quite different. I did manage to get the 'print number' code out of it, but that was pretty much it. So I've done a lot of the remaining M9301-YA code (new version uploaded to location above); not the per-device code, I'll probably blow that off, but other than that, only a few tiny sections remain to be understood. Can someone with a M9301-YA please verify for me that location 165450 contains 0770? I think that perhaps that is wrong, because the code makes no sense if that's correct - maybe a bit has been dropped, or something? And if anyone has a good M9301-YB, I would appreciate a dump. (I do have one, but don't - yet - have a running UNIBUS -11 to plug it into.) > From: Don North > I've had two DL11-W in my 11/34A BA11-K box for years and have never > had an LTC issue. I suppose if you had a a larger number (say four or > more) you might possibly see an LTC issue Hey, all I know is what's in the manual (which Josh posted). :-) I'd forgotten there was a jumper you could pull - I tend not to like to do things like that as it makes the cards non-pull-and-plug interchangeable. Hence my suggestion to 'just use an M7800'. Noel

9 years, 2 months

Old terminal avaialble in Houston

by nospam212-cctalk＠yahoo.com

I have an old terminal available in Houston. It is a red terminal with Bendix and Logicport 2 printed on the front next to the side of the screen and an acoustic coupler on the top. It comes in a big red carrying case. Need to move this out if anyone is interested contact me off list otherwise I guess I'll have to take it to the recycle center. Would rather see it go to someone who could use or enjoy it. David Williams www.trailingedge.com

9 years, 2 months

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test-drb May 2015