> From: arcarlini at iee.org> > Jeff Walther wrote:> [snip description of carbon arc, mains power and hand-held clothes pegs> :-)]> > > I don't recall the instructions saying anything about not looking> > directly at the arc. Perhaps this method doesn't generate enough> > UV to be useful/harmful?> > Perhaps the odds of surviving long enough for UV exposure to be an issue> turned out to be quite low :-) At least over here in the 240Vac world.> > Antonio> Hi
I see people talking about looking into a UV light source. If you are
worried about the internals of your eye, don't worry. The cornea
will absorb the UV for you. Then, you may need cornea surgery
to replace your damaged cornea. It doesn't matter if you are looking
directly into a UV light source, it is just if there is a direct line
between your eye and the UV source.
People don't understand microwave ovens either. It isn't looking
into the microwave that is the problem, it is getting your eyes
close to a leaky microwave seal. You can look into a microwave
oven as much as you like as long as you don't get too close.
With microwaves it is the inside of the eye that is damaged.
As was pointed out, the instructions didn't mention electrical
shock either. As I stated before, it is the temperature that creates
the UV. If it looks blue-white, it is most likely producing UV as
well. If it is yellow or orange, it is most likely not.
Also remember that little UV is reflected from surfaces.
Dwight
_________________________________________________________________
Gear up for Halo? 3 with free downloads and an exclusive offer. It?s our way of saying thanks for using Windows Live?.
http://gethalo3gear.com?ocid=SeptemberWLHalo3_WLHMTxt_2
OK I realise this is cheating slightly but I still thought it was quite
cool that it worked...
SimH on a Nokia N800:
http://carrierdetect.com/?p=39
VM/370 R6 under Hercules on an N800:
http://carrierdetect.com/?p=40
Just wish the thing had a CF slot and thus could take a Microdrive, in
order that I wouldn't have to worry about frequent writes to flash
storage. Speaking of which does anyone know if VMS can live without page
and swap files? Somehow it doesn't seem likely... Trying to work out how I
could make it do as little writes as possible to the FS, e.g. by disabling
opcom, auditing and so on. And is there a 'noatime' mount option
equivalent for ODS?
Andrew
----------------
Andrew Back
a at smokebelch.org
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-----------------Original Message:
Date: Mon, 17 Sep 2007 19:50:25 -0400
From: "Roy J. Tellason" <rtellason at verizon.net>
Subject: Re: PS/2 Interface (was: Wang 300 Calc]
On Monday 17 September 2007 18:57, Tony Duell wrote:
<snip>
> I have an S100 amchine called a CASU Super C. It contains a Cromemco CPU
> board, some other stnadard 64K RAM bvoard, a Micromation Doubler disk
> controller and CASU-designed boot ROM and seiral interface boards.
>
> The disk drive (a Persci) is in a separate box. The 50 wire interface
> cable is split down the middle adn connected to a pair of DB25s...
I have a Cromemco "System 3" (?). It also has a Persci drive in it, a dual.
Is that what yours is?
There's apparently some sort of a problem with mine, as the floppy which was
in it when I got it had been tried so much and for so long that the initial
tracks were completely worn away, and you could see through it.
On perusing the service data for it, I notice that the drive uses a bunch of
_incandescent_ light bulbs for things like index sensor, etc. I would
imagine that one or more of these is likely to be the problem.
I'd deferred working on it because you can't do much with it in the computer
case, and I needed to make some sort of extension for the power cable to the
drive, which was a rather odd connector...
Nice machine, in that the S-100 card cage pulls out like a drawer. Too bad
it's not working.
------------Reply:
Lots of luck with that Persci; nice and fast when they worked, but...
My 3s all have Tandon singles; slower but infinitely more reliable.
You probably know, but the controller can use both 5 1/4 and 8" drives; it's
sometimes convenient to hook up a known good 5 1/4 drive to check out
the rest of the system and get it up & running before you dig into the 8".
Also makes it easier to make disks from PC images if you need them.
If there's no HD you might have trouble finding 12V though & need a
separate supply or regulator; an external powered 5 1/4 disk in a nice
enclosure is a useful peripheral for a System3.
Relevant to the original discussion: Cromemco's external 5 1/4 FDDs
and tape drives used a standard Amphenol IEEE connector as used on
parallel Commmodore FDDs &c (not IEEE protocol though ;)
mike
For those who collect old Byte and Interface Age mags, I've begun
posting my duplicate issues on the 'bay. If you're interested, here's
the link to my listings:
http://search.ebay.com/_W0QQsassZdev*null
--
jht
Hi folks,
Can anyone help identify the keyboard in these photos? (apart from
the obvious, that it's made by Stackpole and has a part number of
86-90-0048 ;)
http://www.loomcom.com/junk/stackpole1.jpghttp://www.loomcom.com/junk/stackpole2.jpg
I picked it up for fifty cents at a swap meet in the hopes that it
might be an ASCII keyboard that I could use in an Apple I replica,
but given that it has a 40-pin DIP socket, it's clearly not (it was
very early in the morning, what can I say). It has a five-pin power
header on the top left, two red LED indicators, the aforementioned 40-
pin DIP socket, and only one IC, an SN7414N, so it's obviously not
doing much logic.
-Seth
Surely any publisher of an article past or present and where software is
an important part of the design and who does not print a listing is only
doing half the job. If they are doing this to sell a few preprogrammed
chips then shame on them.
For old designs we may come across and wish to restore and are prevented
by this practice lets have a 'Wall of Shame' to identify those people
who left us a legacy like that.
Rod Smallwood
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: 14 September 2007 20:41
To: cctalk at classiccmp.org
Subject: Re: Ancient 8086/80286 unixes?
>
> On Thursday 13 September 2007 01:30:39 Ensor wrote:
>
> > I first came across this myself in the mid-90s. I'd picked up a copy
> > of "Elektor" for the first time in almost 10 years and was surprised
> > that they didn't provide any listings of any form for the projects
> > based around PICs, you had to send away for pre-programmed parts.
>
> That's about when I remember seeing it happen; also with an article in
> (possibly) PE&EE about building a Z80-based SBC that ran Forth.
Actually, Elektor have been rather better about this recently, and in a
lot of cases the _source_ code for the microcontroller firmware is
available as a free download from their web site.
Alas, in some cases (often for the projects I am most interested in
:-(), this is not the case, often becasue the author gets a royalty from
each pre-programmed chip sold.
>
> These days when you can build a simple PIC or ATMEL programmer from a
> couple of components, or buy an EPROM programmer off eBay for about a
> tenner, there's not really an excuse.
I suspect the reason (not an excuse...) was that they made money selling
pre-programmed chips. Certainly when you boughht the pre-programmed
chip, it came copy-protected.
>
> Ob. on-topic: does anyone remember the Forth SBC article I was talking
> about, and does a copy of it exist online anywhere?
No, and as a Forth (and stack based languages in general) lover, I would
be interested.
-tony
> To: cctalk at classiccmp.org---snip---
> > > > My collection's size isn't primarily due to the number of machines, but > > instead because of the size of my machines. And there are a few people > > on this list whose collections are the size of mine or larger, at least > > that I know of.> > > > Hmmm.. A new way to define ones collection - by the space it takes up! :)> Hi
I have a 20 foot container with shelves and a small walk space.
about 15 percent is old radios. The reset is computer related.
I'd estimate that about 75% of my computer collection is inside
the container. As I recall, the container is 8X8X20. I have stiff
to the ceiling as well as some across the top of the walk way
such that one has to duck in places.
One can do the math. Not as big as many but still a nice collection.
Dwight
_________________________________________________________________
Kick back and relax with hot games and cool activities at the Messenger Caf?.
http://www.cafemessenger.com?ocid=TXT_TAGLM_SeptWLtagline
The Dec20 is good but get a load of that DS570.
Now that is really nice
Rod
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Zane H. Healy
Sent: 18 September 2007 05:00
To: General Discussion: On-Topic and Off-Topic Posts;
General at shiresoft.com
Subject: Re: New acquisition
At 8:47 PM -0700 9/17/07, Guy Sotomayor wrote:
>Hi,
>
>I just wanted to let y'all know that I recently acquired a DEC 2065.
>I put up a quick web page of how my shop is being reorganized to
>accommodate the new "toy". Warning this is not a permanent location
>(ie if you link to it you may not find it in a month).
>
>http://web.mac.com/ggs17/site
Drop the site from the URL and it will work... http://web.mac.com/ggs17
I'm not sure, if I'm jealous, or relieved that I'm not the one trying to
take care of that BEAUTIFUL system!
What are you going to run on it? What were you running on the KL10?
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
| MONK::HEALYZH (DECnet) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
>
>Subject: Re: Handheld VAX and System/370.
> From: Andrew Back <andy at smokebelch.org>
> Date: Tue, 18 Sep 2007 08:23:06 +0100 (BST)
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>On Mon, 17 Sep 2007, Sridhar Ayengar wrote:
>
><<SNIP>>
>
>>> Just wish the thing had a CF slot and thus could take a Microdrive, in
>>> order that I wouldn't have to worry about frequent writes to flash storage.
>>> Speaking of which does anyone know if VMS can live without page and swap
>>> files? Somehow it doesn't seem likely... Trying to work out how I could
>>> make it do as little writes as possible to the FS, e.g. by disabling opcom,
>>> auditing and so on. And is there a 'noatime' mount option equivalent for
>>> ODS?
VMS cannot live without page and swap. What you can do is maximize the memory
it has to reduces the need to psge/swap.
>> Wasn't there someone making an outboard adapter for SD that holds a CF? I
>> have something similar that holds a CF and plugs into a SmartMedia slot.
can't help on that.
Allison
