On 5 February 2018 at 20:06, Chuck Guzis via cctalk
<cctalk at classiccmp.org> wrote:
> I have a similar gripe with barrel connectors,
> which don't seem to enforce any standard at all regarding polarity or AC
> vs. DC.
.. which led me to accidentally power a USB hub with 12V instead of 5V
- the power supplies looked the same, had the same plug, and I
couldn't read the tiny writing on the warts. That blew the nicest
notebook PC I've ever found - I bought it in Japan at a special price,
the normal price is out of my league.
Since then I have bought a Dymo and, armed with a magnifying glass,
went through all the chargers and warts I own and labelled them. Which
I should have done *before* the accident of course. But what if there
was some kind of standard for barrel connectors instead.. sigh.
Hey everyone, thanks for always serving as a great sounding board and
source of advice!
I have an issue with a PDP8E which has an issue with the power supply.?
The -15V, 15V, and 5V are good, and my Bus Loads board is good, but for
some reason the power supply is bringing down the 3.75V signal from the
bus loads to 0V (this is the DC VOLTS OK grey wire from the power supply).
I'm having troubles finding the schematics of the PDP8e power supply,
also any suggestions on what could be pulling the 3.75V to 0V (tested
multiple Omnibus backplanes, and bus load boards, so I'm fairly certain
it's the PSU).
All help is MUCH appreciated, thanks!
> Date: Thu, 1 Feb 2018 12:55:41 -0500
> From: Douglas Taylor <dj.taylor4 at comcast.net>
> To: "General Discussion: On-Topic Posts" <cctech at classiccmp.org>
> Subject: VMS 8.4 Alpha Hobbyist disk images
> Message-ID: <92b4de6a-b537-4bfb-a1fd-1ebe8133f11a at comcast.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> I'm getting an Alphaserver 1000a and wanted to install VMS 8.4 -
> hobbyist license from CD.
>
> So, I went to the folder on my PC where I have the 8.4 hobbyist
> distribution.? There are 3 ISO files; ALPHA084, ALPHA084LP1 and
> ALPHA084LP2.
>
> I thought I would burn these to CD and up and away.? However, Windows 7
> balks and says, 'The selected disc image file isn't valid'.
>
> Is it Windows 7 or is there something I'm missing?? Is the CD on the
> Alphaserver 2048 byte block size or 512?
>
> Doug
They _are_ 'ISO' images but in a format which Windows 7 or whatever burning
program you're using doesn't understand.
I used Nero (or Daemon I think) to write CDs for my VAX but there will be
plenty of other programs equally suitable.
You don't need to do anything special, just treat them as an ISO image and
let the burning software get on with it.
Once written, Windows won't be able to read them so don't panic. If the
burning software includes verification then it (not Windows) will be able to
read them back OK.
(I'm using VMS v7.3 but I'm sure this is no different).
Generally AFAIK the CD readers on Vaxes (Vaxen - ugh!!) and Alphas will
deliver 512 byte blocks but this isn't relevant for the image itself.
Bob
Hi,
I am working on several projects requiring 2708 and 2716 EPROMs, and
am finding some of my chips will not erase, and some will not take
a program. I've also learned more in the past week than I wanted
to know about repairing Data-I/O 29a/b programmers.
I vaguely remember in the 1990s baking such EPROMs in the oven, but
I do not remember temperature or time. I was surprised that Google
didn't turn up anything useful with this info.
I'm sure someone here will have some notes on EPROM baking.
Mark
--
Mark G. Thomas (Mark at Misty.com), KC3DRE
I'm getting an Alphaserver 1000a and wanted to install VMS 8.4 -
hobbyist license from CD.
So, I went to the folder on my PC where I have the 8.4 hobbyist
distribution.? There are 3 ISO files; ALPHA084, ALPHA084LP1 and ALPHA084LP2.
I thought I would burn these to CD and up and away.? However, Windows 7
balks and says, 'The selected disc image file isn't valid'.
Is it Windows 7 or is there something I'm missing?? Is the CD on the
Alphaserver 2048 byte block size or 512?
Doug
On 6 February 2018 at 06:09, Zane Healy via cctalk
> And obviously I meant to ask, is anyone able to get email from this list via
> either gmail or an email account hosted by RackSpace?
I've always used gmail with the list. There used to be a problem with
automatic de-subscription due to 'excessive bounces', that problem
went away after the list was modified to not show 'From' addresses
directly. Since then the gmail/list combination has worked perfectly.
I've got two RL02 units. One is a parts unit and has an access plate for
the door solenoid. I can open it. The other has no access plate nor is
there a cutout for one. How do I open this cover with the power off? This
is a newer unit as it has head lock screws on the bottom of the drive.
The second question has to do with rack mounting. I want to mount this in
a H960 cabinet but will obviously need to slide it out to replace packs.
All the unit has is a thin rail on both sides that is riveted to the unit.
It looks like chassis slides were there originally. Does anyone have
either the DEC part # for the slides or a contemporary part # for one that
will work?
Thanks,
Marc
The alphaserver 1000a I have has a storageworks array.
The disk carriers are green in color, I see storageworks disks for sale
on ebay that are blue.? What is the difference? Are they interchangeable?
Is it possible (or even wise) to open one of the green carriers and
change the disk out?
Doug
