This summer, I received a box full of parts containing a Grid Compass 1101
which I was told was "beyond repair due to a battery leak".
I've been looking it over, and I'm not so sure -- a battery definately
leaked over the section of the board containing the bubble memory sockets.
however the board actually does not look that badly damaged - the coating
seems to have mostly protected it - there is visible corrosion at solder
joints, however again - not that bad - most of them just have a rough
texture.
The board however is quite covered in some areas with a white substance
which obviously came from the battery and "dried up". It is quite firmly
glued to the board, and appears to be slightly conductive. I've carefully
scraped away a small section, and as noted above, the board underneath
looks to be in not-that-bad shape ... however mechanical removal would be
very tedious the the risk of damaging something high.
I don't know what type of battery it was, because it's long gone, and I've
not seen the inside of this particular model before...
Anyone got any suggestions on ways to clean this up - It's a nice and
somewhat historic machine, which I would love to salvage if at all possible.
(Cool little bubble memory modules)
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
I was just down at Tukwila RE-PC picking up a PSU, and I noticed they had a niceish complete (includes monitor, kbd, mouse) SGI IRIS 3120 on the floor, no price yet and they said it wasn't ready for sale (possibly they are concerned about wiping the drive- which they do). If anyone's interested (and has access to GL2-W disttapes) they might want to open up inquiries.
Anyone watch the TV series Lost this week? What kind of computer does the
mystery man in the bunker have?
Thanks ahead of time, On digest,
Isa in Houston riding Rita out
Does anyone know where I can find one or two Orbis drives for 8"
floppies? I believe it's the only drive that will read floppies created
on an orbis drive.
thom
Sun 3/140 (saw one on ebay months ago, liked it). Also
early Apollo, Tektronix, perhaps SGI, and other stuph.
__________________________________
Yahoo! Mail - PC Magazine Editors' Choice 2005
http://mail.yahoo.com
Hello,
I was referred to this address as I am looking for
an Original Compaq Portable. It would be great to be
functional, but is not necessary as long as it is
complete. My company is doing a display and we
unfortunately do not have one of these around anymore
to show what we started with.
Thanks for your assistance.
Jason Clock
> -----Original Message-----
> From: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Paul Koning
> Sent: vrijdag 23 september 2005 15:31
> To: cctalk at classiccmp.org
> Cc: cctech at classiccmp.org
> Subject: Re: State of the art
>
> >>>>> "Chuck" == Chuck Guzis <cclist at sydex.com> writes:
>
> Chuck> I was catching up on my reading and came across an
> interesting Chuck> article in the September 2005 IEEE
> Computer Society "Computer"
> Chuck> magazine. The gist of the particular article was
> that the Chuck> graphics processors on many high-end PC
> video cards are Chuck> overlooked for applications requiring
> heavy number-crunching.
> Chuck> What caught my eye was the chart that illustrated
> that the Chuck> Nvidia G70 graphics processor now performs
> at about 170 Chuck> GFlops! (A dual-core Pentium 4 running
> at 3 GHz, by contrast, Chuck> will do about 20 GFlops).
>
> 20 GFlops with a 3 GHz processor? How can that be -- that
> would require 3 FP functional units per core, each issuing
> one instruction per clock cycle. Did you mean 2 GFlops?
>
> Chuck> Granted, this is 32-bit vector floating point
> arithmetic, but Chuck> the raw numbers are pretty stunning.
>
> Sure is.
>
> There may be as many as three processors tucked away in your
> PC that are more powerful (though more narrowly focused) than
> the main processor. The graphics engine is one -- the other
> two are the digital signal processing engines in the disk
> read channel and (if you have one) the Gigabit Ethernet interface.
>
> There's a group somewhere (can't remember the name or URL)
> working on developing parallel processing algorithms that run
> on your graphics card -- essentially treating it as a vector
> coprocessor for your PC.
>
> paul
... and then there is a nice DSP on the modern soundcards.
HAM radio amateurs use the soundcard DSP to decode those chirpy signals
you can hear on short wave. Even signals burried in "noise" produce text
on your screen. A good example is MixW, but there are several!
- Henk, PA8PDP.
I recently acquired an HP 9895A 8" floppy drive and was wondering if
anyone has user, service, or programming manuals.
If I pop off the front cover there is a numeric dial switch, maybe
that is simply the HP-IB address. There are also a couple of test
switches. I wonder what those do.
Anyone know for sure whether or not it is natively supported by an HP
Integral PC? I'll probably give that a quick try as soon as I have a
chance.
I'd also like to try hooking it up to my HP 1000 which has an 12821A
interface card. This is supposed to be a supported boot device with
the 12992H loader rom.
I can look at the 12992H loader rom source and figure out how to read
the first sector from the drive, but it would be nice to have complete
programming information for the drive. Apparently the 9895A is an
Amigo protocol drive, not a CS/80 drive. Does anyone have a generic
Amigo protocol spec, or a 9895A specific HP-IB protocol spec?
