Hello All,
I have available one PDP 11/35 in a 10.5" BA-11 box.
It contains the processor backplane, programmers console,
a cpu with the base processor, EIS option, stack limit, MMU
and a 256Kb memory card.
Next to that is has a 9 slot DD11 expansion backplane, and
optionally a complete RK-11D disk controller.
Please contact me off list with your offer.
Thanks,
Ed
Vinegar! Vinegar! Vinegar! The common household type!
>From a US cook's standpoint, if "vinegar" is specified with no
qualifiers, the type is determined by the application.
If I'm making a salad, a flavored vinegar, such as wine or malt or
even apple cider vinegar is used. Balsamic vinegar has lots of gunk
in it and is used for a more complex, somewhat sweet flavor in
marinades and salad dressings. I'd never think of using it to clean
a PCB. Rice wine vinegar is often used in oriental cooking--somewhat
sticky when the water evaporates.
If I'm pickling (e.g. dill pickles or making sauerkraut), I'll use
distilled white vinegar (usually about a 5% solution) as it's the
least expensive (commonly sold in gallon jugs). The same vinegar is
used for removing lime deposits from a steam iron or coffee maker and
for washing windows (if lime stains are present). Just plain old
dilute acetic acid, source not important.
Brass musical instrument players soak their instrument's valves and
tubing in white vinegar to remove deposits left from saliva. Doesn't
hurt the brass at all and leaves little smell behind.
Sulfamic acid (dry crystals obtained from a paint store) is often
used when cleaning masonry indoors where the fumes of muriatic acid
would be objectionable. It's stronger-acting than vinegar, but less
than muriatic acid and conveniently mixed from the crystals and water
as needed.
Cheers,
Chuck
I recently restored a system that required a TTL serial keyboard. I
initially "hacked" a setup using a VT520 (RS-232) with a "SchmartBoard"
RS-232 to TTL converter.
Then I found several Keytronic RS-232 serial keyboards on eBay from a single
vendor. After reading the specs, I found the keyboard supports both RS-422
and RS-423 by jumper settings. The default setting is RS-422 - which means
that one can use "one-side" of the differential output as TTL serial. It also
defaults to 300BPS - which is what I needed. (The specs say it can do 9600BPS
as well).
For those who care, the keyboard is "driven" by an 8048 8-bit microcontroller.
I bought four of these keyboards in a previous auction from the same vendor
and they are in excellent condition. He now has them listed again as item
#300237350802. Starting bid is $9.95...
Regards,
Lyle
--
Lyle Bickley
Bickley Consulting West Inc.
Mountain View, CA
http://bickleywest.com
"Black holes are where God is dividing by zero"
Paul,
While trying to find a Heathkit ETA-3400 I ran across your message authored
in 2004 requesting a copy of interface/ops manual for this part. I believe
I have the info you are looking for. Please let me know if you still need
the info.
73's
David Finell
N7LRY
Anyone have any info on a Colorado Memory Systems Jumperless Tape
Controller 026-328?
It's an 8-bit ISA card with an Intel 82077AA floppy controller. I
have no intention of using this as a tape controller, but wondering if
it would be useful as a floppy controller?
Anyone have on programming info for this card? In addition to the
82077AA and 24MHz crystal there are 3 PAL16L8 and 2 PAL20L8. That's
probably more logic and what would be needed for I/O address, IRQ, and
DMA routing alone, but maybe not.