Hi
These are usually made on a glass plate. They look
like a larger version of only one of the dies of a wafer.
Some are actual size but most are done with steppers now days.
The glass has a thin metal coat on one side ( mirror looking ).
I think they use chromium but I don't recall. You can see
that layer's detail by holding it up to the light. The metal
has been remove in places. It is kind of like a negative and
used the same way.
The ones for things like uP's of today, include a set of
about 30 or 40 for different parts of the processing. A full
set of these cost about 0.5 M$ to make.
Dwight
>From: "Chandra Bajpai" <cbajpai(a)attbi.com>
>
>I got to ask this...what's a wafer mask...what's it look like?
>
>-Chandra
>
>
>-----Original Message-----
>From: cctalk-admin(a)classiccmp.org [mailto:cctalk-admin@classiccmp.org]
>On Behalf Of Hans Franke
>Sent: Wednesday, March 12, 2003 6:22 AM
>To: cctalk(a)classiccmp.org
>Subject: RE: collecting silicon wafers
>
>> 1. Stamps are printed in vast numbers
>> 2. They are used and, in most cases, eventually destroyed
>> 3. They are difficult to forge (convincingly)
>> 4. Most are virtually worthless
>> 5. A few a almost priceless
>> 6. Many are beautiful
>> 7. They have an inherent research interest - printing varieties,
>> flaws, rarities, historical interest etc.
>> 8. They are (usually) considered most valuable unused and even
>> more valuable in an unbroken sheet.
>
>> [...]
>
>The whole idea of wafer collecting got something to it, although
>I think the stamp reference is a bit far fetched.
>
>Gruss
>H.
>
>BTW: I realy love wafer masks ... they are just a bit hard to find.
>So if one of y'all (sp?) got some laying around ...
>
>--
>VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen
>http://www.vcfe.org/
> you can't make a 8008 chip from scratch
In the discussion of wafers it made me wonder if one could lay down their own
design in Silicon. or duplicate an early design like the 8008 (lets not get
into a discussion of copyrights).
Does anyone collect FAB equipment? A small clean room would not be hard to
set up. At one time I saw a 3 inch mask aligner go for $25. I bought the 4
inch Mask Aligner for $150. There is so much old FAB Equipment around it
seems one should be able to set up a home lab. Does anyone know of one in
existence?
Paxton
Astoria, OR
>From: "Jim Kearney" <jim(a)jkearney.com>
> there's One True Source. When I built mine (from Steve Gabaly's boards), I
> was
> able to find most of the TTL parts in 70's vintage. So how 'new' is it?
p.s. but that's not to say that I wouldn't be clear about its construction
if I put it up for sale, of course. That would be definitely be
misrepresentation,
even by omission.
I've been attempting to do some macro programming of the DEQNA Ethernet
card under RSTS/E. All of the system calls to actually send/receive
packetes seem to be very well documented and fairly easy to use. What I
can't find in any of the manuals (or on the net) is a system call that
will return the card's MAC address.
I know that the MAC address is the first six bytes of the CSR. However,
I'm not sure how to go about accessing the device's CSR from within
RSTS/E. Ideally, I'd use a subroutine that would return any network
card's MAC given its type (XH or XE) and unit number.
I know that I can't be the first person to have ever tried to do this,
so I'm turning to those who should know - you guys. Any help would be
greatly appreciated.
--
Christopher L McNabb
Operating Systems Analyst Email: cmcnabb(a)4mcnabb.net
Virginia Tech ICBM: 37.1356N 80.4272N
GMRS: WPSR255 ARS: N2UX Grid Sq: EM97SD
Hi
I'm looking for a data sheet for the Synertek 6507.
This is not the same as the reduced pin 6502's of the
same number by other manufactures. This is a video control
chip. If anyone has an old Synertek book with the
programming information for one of these I'd like
to get a photo copy??
Thanks
Dwight
Well, I read the original posting and I didn't feel it was fraudulent. While
he did not say it was "New" it was apparent to me that it was probably a
reproduction.
I sure would have asked if I was concerned if it was original. If it was my
posting I probably would have been a little clearer.
It seemed to me that the posting followed the rules of classic capitalism,
maximize your plusses, minimize your negatives and let the buyer beware. Good
US values.
Paxton
Astoria, OR
Who is not a very good capitalist.
Once a million dollar vector-parallel supercomputer for research
projects at the Australian National University, this Fujitsu VPP300 is
now being auctioned off at eBay.
With 13 143MHz vector processors, a fast crossbar interconnect and 14GB
of RAM, the four-cabinet machine boasts peak performance taps of 28.6
Gflops. Back in 1996, when the supercomputer was installed at
Australia's National University it was the dog's bollocks. Now the ANU's
Fujitsu VPP300 is being put out to pasture by that most modern of
routes, an auction on eBay .
For those wanting to bid :
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=3405888342
when I looked it was at 12 AU$ or a tad over US$7. Watch out for the
shipping charges though.
-- hbp
Hi all,
after having downloaded both distributions from a PUPS mirror, I was trying
to install Venix or 2.9bsd modified for the PRO350.
I've created for both distributions the installations floppy using a mvaxII
with an rx50 floppy. The mvaxII actually runs netbsd, so I did a dd
if=floppy.img of=/dev/rx0a for all the floppy images of the distributions,
but when I go and try to boot the bot floppies of venix (and 2.9bsd too) on
the PRO350, they fail to boot. The drive seems to try a little then the
machine hangs, no messages on the console, except a nice capital DIGITAL, no
messages on the serial terminale connected to the printer port with the
maintenance cable.
With venix floppy instead, after failing to boot, after a litle P/OS starts
>from hd.
What am I missing, what did I wrong ?
Any hint will be greatly appreciated.
...
Franco Tassone
I've got a ROM capsule in mine marked "VTLink", which adds an item to the
Applications section called "Export Page".
Selecting it brings up a page which looks roughly thus:
File Name: _________________
Cartridge Name: ____________
Drive (L/R): _
Page (1-99): __
Format (Q/A/N): _
Thing is, I lack the manual for this capsule, and attempting to export
anything just says "NO PAGE STORE".
So, what am I missing??
Incidentally, a Google web/groups search of VTLink with any variant of
OPD/Merlin/Computerphone type keywords results in a big fat zilch (until
this message gets archived & then googlebotted, of course...)
--
Cheers, Ade.
Be where it's at, B-Racing!
http://b-racing.com
