Thoughts on restricted distribution documents (Dec Professional 350)

Chris Zach cz at
Tue Sep 29 12:56:37 CDT 2020

Ok, got a good starter scan. Did it at 600dpi, black/white, saving here 
as Tiff and JPG formats in different directories. Will make a cheap-o 
PDF version and put it on in a bit.

I also have the 4 volume set of Professional Toolkit and a 4 volume set 
of Ultrix/11 manuals. Have these already been uploaded somewhere?


On 9/29/2020 11:31 AM, Rob Jarratt wrote:
> I have broken 350s and would love to get hold of this information too...
> Regards
> Rob
>> -----Original Message-----
>> From: cctalk <cctalk-bounces at> On Behalf Of Paul Koning via
>> cctalk
>> Sent: 29 September 2020 15:16
>> To: Chris Zach <cz at>; cctalk at
>> Subject: Re: Thoughts on restricted distribution documents (Dec
> Professional
>> 350)
>> I have wanted to see that for my work on the Pro.  It would be great to
> get it
>> scanned and posted, whether the copy lands on Bitsavers or elsewhere.  As
> far
>> as I know it is not currently available.
>> Does it include the programming manual for the 4-line UART option board?
> I
>> have such a board and since I wrote a driver for it, decades ago, I must
> at one
>> time have had a programming manual, but I certainly don't have it any
> longer.
>> The internal bus and the boot ROM details are examples of stuff not
> covered in
>> the currently available manuals on Bitsavers; those details were not
> exposed to
>> the outside world for some reason.
>> 	paul
>>> On Sep 29, 2020, at 10:10 AM, Chris Zach via cctalk
> <cctalk at>
>> wrote:
>>> Question for the group: I have a document set here from DEC that is the
> "XT
>> Hardware Handbook". It's basically the entire pre-release documentation
> set
>> for the "XT-100" terminal/computer which became the Professional 325/350.
>>> Is there a copy of this on the internet, and what are the thoughts on
> scanning
>> this? Is there already a better copy of this information out there, this
> seems to
>> cover the whole internal bus, how the cards work, and so forth...
>>> Chris

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