I have a little board (2 by 3 inches) with a few TTL chips (7408 and
7474s) with a short ribbon cable terminated with a 14 pin DIP header.
No numbers, but the board says APTEC, 1976 REV B, and a "phase 2"
symbol. I think this was part of some old microcomputer stuff I used
to have. Any ideas what it could be?
--
Will
>
> Date: Thu, 18 Feb 2010 13:07:58 -0700
> From: Ben <bfranchuk at jetnet.ab.ca>
> Chuck Guzis wrote:
>
>> Soldering now is far safer than it used to be. I can still recall
>> the glorious sensation of picking up an American Beauty 100W
>> soldering iron by the wrong end.
>>
>> I suppose that we should be thankful that we don't use an
>> oxyacetylene torch for PCB work...
>
> I guess that is why BYTE[1] went from a hardware magazine
> to software.
Some of the best advice I got in college was from an EE professor who told
us, "If you drop your soldering iron, don't try to catch it on the way
down. Just let it go."
Jeff Walther
Recently acquired a VCB02 (thanks again, Ulli!) which I hope to get
running in my MicroVAX III. I'm looking for the cable that connects
>from the bulkhead to the monitor, keyboard and mouse (my research has
revealed this to be referred to as "BC18Z-10" in DEC documentation). I
have a compatible keyboard, but I'd like to find a mouse as well...
Anyone have one to spare, or know of a decent supplier?
Thanks,
Josh
Hello, with all this talk about SD card for QBUS machines, I was
wondering: SD (and SDHC) is easy to interface (if you're not too
concerned about speed) and has been attached to pretty much everything
under the sun; (well, I guess Jim is still working on the C= version
of IEEE-488) so is there anyone making an SD card drive for SCSI?
To me that would be a very versatile classic interface; I'd love to
have a dead-silent drive for my Amiga, Macs and Sparcs. ST owners
would like it too, I'm sure. I know there is one company making
SCSI-to-CF interfaces, aimed primarily at old synthesizers
(http://www.scsiforsamplers.com/).
Unfortunately, the online "search space" is somewhat poisoned due to
the fact that most Linux/BSD/whatever OS's use a SCSI emulation to
access SD cards - but eyeballing several pages of results I didn't
find any SD-to-SCSI devices.
I certainly don't have the technical chops to make something like that
myself from scratch - but I'd guess a low-speed hack to do it could be
accomplished with a Atmel or similar chip with at least 21 IO pins (16
for the SCSI side, 5 for the SD card) but I don't know what kind of
line drivers would be needed on the SCSI side. Is anyone aware of
such a project in the works?
Joe.
--
Joachim Thiemann :: http://www.tsp.ece.mcgill.ca/~jthiem
Hi folks,
Joachim Thiemann wrote:
> so is there anyone making an SD card drive for SCSI?
A good one to look at is:
http://www.circuitgeek.com/the-outstanding-avr-based-scsi-ram-disk/
The above project has also been adapted to work with a standard ATA hard disk and Compact Flash. It's an open development project: you can download the source code to the firmware and schematics. His website seems to be down right now though.
And there's also this:
http://www.reactivedata.com/Products/SCSI_Bridge_Emulators_to_CF/index.php
It seems to me that a good route would be to build, say a QBUS card driven by a microcontroller. Given that even an AVR can handle SCSI comms at a hardware level by itself it can probably handle MSCP and a lot of the interface logic.
-cheers from julz @P
I collect Zeiss equipment, and almost anything optical made brass. But a
Hasselblad...hmmm.
Paul
On Mon, Mar 8, 2010 at 9:59 PM, Zane H. Healy <healyzh at aracnet.com> wrote:
> At 7:44 PM -0800 3/8/10, David Griffith wrote:
>
>> I'll take your unwanted Model M keyboards.
>>
>
> Hehehe... I only have two, and they're among the very few Classic Computer
> items that I want to keep.
>
> Is anyone in Oregon looking for Classic Hardware? If so what. I'm looking
> to start selling off my collection. Though someone with a nice Leica (with
> lenses), or Hasselblad or Large Format Lenses might be able to score a good
> trade.
>
> Yes, this includes rare systems. Except for some PDP-11, VAX, Alpha, and
> Commodore gear I think I'm looking to unload most of my classic gear.
>
> The only computer I use at home any more is my Mac. I just don't have time
> or interest in Classic Computers any more.
>
> Zane
>
>
>
> --
> | Zane H. Healy | UNIX Systems Administrator |
> | healyzh at aracnet.com | OpenVMS Enthusiast |
> | | 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/ |
>
Suppose my power company claims that the charge is $0.02407 per
killowatt/hour. If I have a computer (or anything) that draws maybe 100
watts. that should be 0.1kw/h x 0.02407 x 24 hours = 5.7768 cents per day
or $1.73 a month. I've been under the impression for quite some time that
it costs $20 a month to run a typical modern desktop computer 24 hours a day
for a month. I know there are taxes and fees thrown into the power bill.
But what's wrong with my math? Was I wrong before or am I wrong now? I got
this kw/h price from the power company web site burried in a pdf somewhere.
It looked like the right price to me. Maybe the actual charge is much
higher?
brian
Hi. I'm curious if anyone's got RTE-M booting from mini-cartridge (such
as 2645A terminal) or 8" floppy (such as 9885M) for their HP 1000 21MX
(eg. 2113E).
I'm attempting restoration of a 2113E with the extremely kind assistance
of J. David Bryan, and would love to find a bootable primary copy.
It would also be great to hear what OSes folks are running on these, and
which version they like the best.
Thanks very much,
John Singleton
Rockville, MD.
