DEC QBUS buffers/control chips

From: Antonio Carlini <Antonio.Carlini_at_riverstonenet.com>
Date: Tue Jun 18 15:07:23 2002

>Intersting you mention the DHV11 as I've just been looking at the printset
>for the board as I have one here with the square component at the top between
>the two ribbon connectors broken off. looks like a 56uH choke or inductor or
>thingymabob. Something to do with the DC-DC convertor to generate -12V for
>the RS232 drviers I think. Wonder if I can repace it with a bit of wire :)

I'll ask one of the designers when he gets back from his hols :-)
Since I think it is a voltage regulator of some sort, I
suspect the answer is no. The only dead board I ever
knowingly found in the pile of cards that I inherited
back in the lab at DEC was a DHV11 and it had had that
very component knocked off.


>Who runs the Spies.com site, are they here on cctalk perchance? Wish there

That's Al Kossow and he's certainly here (and there and
evrywhere ...)

>was a worlwide central resource for getting manuals scanned, OCRd, PDFd and

http://www.decdocs.org points to the main ones. There are
a few more that come and go, plus a scattering of sites
with just one or two manuals.

I don't know of anyone trying any serious OCR - the technology
has leaped forward in recent years, but not to the point that it
"just works". Given that there are somewhere between 300 and
700 DEC manuals online (just an estimate) any OCR process
has to be more or less one button push (i.e. as effortless as
straight scanning can be).

> online. I must do the RSX11M+ v4.1 orange wall I have at some point...

If you can get Mentec to agree to having them made available
(ask about bits of RSX and RT-11 V5 while you are at it ...)
then let me know and I'll get the CDs online. I did ask but
I've not heard anything back.

Antonio

 
Received on Tue Jun 18 2002 - 15:07:23 BST

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