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DEC units on ebay

DougIngraham said:
The actual listing is for a TC58. I did get a mention of TC59 which is a mag tape controller for the PDP9. In some other reading I found mention of TC58 and TC59 as controllers with a DEC specific interface to the tape drives which were made by different vendors but all having the same interface to the controller. The TU10 and TU20 drives were mentioned.
Click to expand...

The TC58 is a Negibus transistor-only magnetic tape controller for a Classic PDP-8 or a Negibus PDP-8/I. It works with TU10, or TU20 tape drives. The TU30 has the right DEC tape bus interface, but is too fast for this controller. The TU20 on our PDP-9 is an HP transport with a DEC adapter to the DEC tape bus. You can put 8x tape drives on a TC58 or TC59.
 
Hm. Wonder if the RF08 could be upgraded to Posibus. I could use a disk drive on my 8/L.....

(Seriously, that's pretty insane. )
 
Oh, on a side note, that Clearpoint memory board is now working as a 2mb board. Apparently these boards have bad chips and the like, switch out the bad or bent pin chip and you have a working board. The thread here is a great read on figuring them out.
 
czunit said:
Hm. Wonder if the RF08 could be upgraded to Posibus. I could use a disk drive on my 8/L.....

(Seriously, that's pretty insane. )
Click to expand...
Our TSS/8 system at UW-Milw was an 8/e and it was shipped with a negi to posi bus converter
Since I think all the 8/i configs shipped with a TC08 all the systems would have been built
with the bus converters.
You have a RF08 laying around?
 
czunit said:
Hm. Wonder if the RF08 could be upgraded to Posibus. I could use a disk drive on my 8/L.....

(Seriously, that's pretty insane. )
Click to expand...
Did they make a Posi version? I suspect they simply provided a Posi to Negi converter.

Both the TC58 and the RF08 interest me. I strongly suspect that it will not be possible to ever get the RF08 to spin without crashing unless new platter(s) are fabricated. And that would be really expensive since we don't know the actual platter construction. I think it is an aluminum blank with some sort of nickel cobalt plating. The blank would be straightforward to machine with a lathe that can do 14" diameter (that size is a guess).
 
Al Kossow said:
Our TSS/8 system at UW-Milw was an 8/e and it was shipped with a negi to posi bus converter
Since I think all the 8/i configs shipped with a TC08 all the systems would have been built
with the bus converters.
Click to expand...
My understanding is that the very early 8/i CPU's were negibus and at some point started shipping as posibus.
Al Kossow said:
You have a RF08 laying around?
Click to expand...
He is talking about the one recently listed on eBay.
 
Havn't posted here in a while...

Anyway, rather curious item showed up in my eBay feed. The Mini-Exchange:

www.ebay.com

Dec Digital Equipment Corporation Mini-Exchange System DFMSA-AA | eBay

Find many great new & used options and get the best deals for Dec Digital Equipment Corporation Mini-Exchange System DFMSA-AA at the best online prices at eBay! Free shipping for many products!
www.ebay.com

Seems to be a device that lets your Rainbow computers share things like printers.

 
This was posted by pbirkel over in the QED1 thread, any interest in a group buy and splitting it up:

www.ebay.com

27 DEC Digital Equipment PDP 11/83 Boards (For Parts, Not Tested) | eBay

I found them in abandoned outdoor PDP 11/83 systems. Digital M310 50-15587-01 B1. Digital M7164 QDA PROCESSOR 5015777-01-C1-P2 L1. Digital M7504-DEQNA 5016028-01 E2P1 (Rust on cover of chip in lower left).
www.ebay.com

Looks like some of it is kinda rough (I see a delidded chip on the ESDI board), but there's some good stuff in there too. If enough folks are definitely interested, I don't mind buying and splitting up like I did with the MTI disk controllers. I just don't want to get stuck with a pile of it :P
 
On a lark I decided to search to see what the Universal 8222 is going for (this is that industrial PDP-11 clone I posted about some time ago), and I found this: https://www.ebay.com/itm/111840442423

Too, WAY too rich for my blood...

(and on the three 8222s and two PDP11s at my work - no update on that front; we hit a speed bump in regards to incoming business and any nonessential projects have been put on the back burner. So, the machines are dusty but still there)
 
tech58761 said:
On a lark I decided to search to see what the Universal 8222 is going for (this is that industrial PDP-11 clone I posted about some time ago), and I found this: https://www.ebay.com/itm/111840442423

Too, WAY too rich for my blood...

(and on the three 8222s and two PDP11s at my work - no update on that front; we hit a speed bump in regards to incoming business and any nonessential projects have been put on the back burner. So, the machines are dusty but still there)
Click to expand...
Is that for one of their Pick-and-Place machines? We've got several of their GSM-1s in the shop, but they're a VME controlled design.
 
Actually, these are through-hole machines... a VCD and a sequencer - the "spare" was from a DIP inserter (which was broken up for spare parts after a couple years - seems it never ran right).
 
Ok, time to fess up. Who got the RF08 drive and do you think you can get it working?

(I got the "Mystery controller" for a pdp8 because I'm going to rewire it for a BM08 compatible memory system for my 8/L. It ain't gonna build itself.)
 
czunit said:
(I got the "Mystery controller" for a pdp8 because I'm going to rewire it for a BM08 compatible memory system for my 8/L. It ain't gonna build itself.)
Click to expand...
I hope you'll consider using the backplane tracing tool or similar to document the thing before it is deconstructed. (If it's just bare backplane you need, I can check my shelves.)

I feel certain at this point that one or more of us will be doing an 8/L memory extension :-).
 
Agreed. Though to be honest I have no clue what that thing did, only looks like a few cards and the rest of the blocks are blank. Need to think about how I am going to wire-wrap a backplane from the old schematics, but I have enough boards to make a MC08 controller, and with only one bit for the memory field it should be easier to debug.

Another option would be to wrap the true BM8L board and build the logic to interface with your five card pdp8/I memory expander. Would take up a lot less space.

Or someone just builds the whole thing on a card.....
 
It's not Ebay, but this auction was mentioned on the CCTalk list and it may be of interest to someone here. It's a very nice looking PDP-8 with a large collection of spare parts, manuals and software. Check out the link to the PDF in the listing.

Digital Equipment Corporation (DEC) PDP-8 Minicomputer Collection | RR

Comprehensive collection of vintage hardware, software, and documentation for the Digital Equipment Corporation (DEC) PDP-8 minicomputer—on
www.rrauction.com www.rrauction.com

PDF: https://d2skn5554g4boz.cloudfront.net/2020-website/698/3490219.pdf
 
In case nobody has seen this one.
Asking price no longer completely insane.
Supposedly, offers will be considered.

www.ebay.com

Make offer - Price reduced - DEC PDP 8/M PDP 8M / 4 avail / /Also DEC PDP 12 | eBay

Find many great new & used options and get the best deals for Make offer - Price reduced - DEC PDP 8/M PDP 8M / 4 avail / /Also DEC PDP 12 at the best online prices at eBay! Free shipping for many products!
www.ebay.com

smp
 
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