Includes "Scope-Mobile" cart, some plug-in modules, and even a few spare
parts. It worked when I got it but developed what I believed was a high
voltage power supply problem that I never got around to repairing. Now I
need the room more than the 'scope, so I'd like to find someone who can
use it.
Shipping is probably not too practical because of the size and weight, but
if you live within reasonable driving distance of the Portland Oregon area
and are able to come and get it, contact me for directions...
-----------------------------------------------------
Mike Newman INTERNET: mike(a)delos.rain.com
Aloha, Oregon USA -or- mike.w.newman(a)gte.net
http://home1.gte.net/res003ki/index.htm
-----------------------------------------------------
Velleity (vuh-LEE-ity), n. A mere wish, unaccompanied by an effort to
obtain it.
Like the subject line says --
I've written an emulator for the Sol computer. It is a Win32 application
and should run fine on any pentium-class machine.
It currently doesn't support any disk drives, the cassette port, the serial
or parallel ports. Still, you can do a surprising number of things, especially
since you can "download" programs via a menu (much faster than the
cassette interface!) Yes, you can run TARG, although I haven't yet tried
placing an AM radio next to my computer to listen for the sound effects. :-)
Solace is a work in progress, but it has already seen a fair amount of beta
testing, including some by the list's own Bob Stek (Saver of Lost Sols).
The emulator is quite simple to run, and it doesn't require any nasty
installation procedures, modifications of the registry, etc. Just unzip
it and run.
If you are interested, go check it out (including a screen shot) here:
http://www.thebattles.net/sol20/solace.html
If you get tired of the programs that come with the ZIP file, download some
more from the Sol archive:
http://www.thebattles.net/sol20/solpgms.html
And as long as I'm here, if you have any Sol docs or programs that you
could share with the Sol archive, let me know about it.
Thanks.
-----
Jim Battle == frustum(a)pacbell.net
(Hopefully I got it right this time!)
I received the following e-mails offering two QX-10s to (a) good
home(s). Please respond directly to their sender if of interest
to you, though I am willing to play a minor intermediary role if
that seems productive.
- don
====================================================
This is something worthwhile to support. Petition is at:
http://mivox.com/essays/index.html
Bill Dawson
<mailto:whdawson*at*mlynk.com> <- Anti-spam protection
?
Your computer will do far more than you ever expected it to,
and that won't be enough.
Pournelle's First Law
Interestingly enough, my "IBM Tape Unit Cleaner" (the real offical stuff!)
says it contains Trichlorotrifluoroethane AND isopropyl alcohol. This is
stuff that I use on an 8809 drive, which is a top-loading, lift-the-cover
sort of a drive, much like a CDC (nee DEC) TU80... if it works for IBM, I
wouldn't be too concerned.
Will J
________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
Does anyone know of an online HP part number cross reference? I'm almost
postive that I've seen one somewhere, but I can't find it now.
I need to find the industry equivalents of the parts listed below. The
1810 prefix parts are probably just resistor packs (although the 16-pin
ones could be RC networks or the like), the 1820 prefix parts are
probably all 4000-series CMOS, and I'm guessing that the 1858 prefix
part is an analog circuit. The T-28751 has a Motorola logo, but no
other part number, not even an HP 4x4. I've occasionally seen other
T-prefix parts in HP gear, but they seem fairly rare, and I'm not sure
what the T signifies.
I've tried HP PartSurfer, but it only listed one of the parts and didn't
give any detail other than "MOS":
http://outfield.external.hp.com/spi/
Thanks!
Eric
part # pins
--------- ----
1810-0252 9 SIP
1810-0316 16
1810-0319 16
1820-0927 16
1820-0936 14
1820-0938 16
1820-0939 14
1820-0941 16
1820-0946 14
1820-0949 14
1820-0970 16
1820-1114 16
1820-1145 16
1820-1241 16
1820-1408 14
1820-1466 16
1820-1485 16
1820-1514 16
1820-1578 16
1820-1665 16
1820-2037 14
1820-2080 16
1858-0038 14
T-28751 16
CLASSICCMP(a)trailing-edge.com wrote:
> There *are* some parts on tape drives that aren't supposed to be
> cleaned with alcohol. Some rollers and vacuum column sensors fall
> into this category.
Maybe some vacuum columns too. HP OEM'd an STC drive (to get a
6250bpi drive to market in a hurry) and called it the HP7976. The HP
CE-supplied rumor back in the day was that alcohol would loosen the
glue that held all those tiny glass beads to the walls of the vacuum
columns!
-Frank McConnell
From: Neil Morrison <morrison(a)t-iii.com>
>FWIW, I believe his opinion was that 128K was enough. My recollection is
>that he wanted that amount to run Multiplan, and that is why he talked
>IBM into using the 8088 instead of the intended 8080 for the IBM PC.
>I believe this because Radio Shack sold add on cards for various Z80
>boxes they made so as to provide 128K for Multiplan (mainly).
Thats so far out left field that I can say there is little basis for it.
RS was not a significant vendor for memory cards or extensions.
As to the choice of 8088 vs 8080, nobrainer. Everyone knew by
1980 that while the z80 was a great cpu there were an emerging
class of apps that really needed 16 (or more) bit wide ALUs and
memory to perform well. Graphics was one of the emerging
apps and the other was programs like multiplan (math intensive).
These and others were the push for the 16bit world.
Additionally 8080 was quite passe` by 1980, 8085 maybe as it
was available as a 5mhz part (vs 8080 at 3!) and Z80 at 4mhz.
There was also Z8000 and other promised parts for the 16bit
world to come. I suspect 8088 won as it was quite easy to
interface and use.
Another point, Multiplan ran under CP/M with 48-60k of available memory
and most 8080 class (include z80) didn't have a MMU to manage more nor
did the OS (CPM2) have management. I have several systems that still
run multiplan (8080 and z80), they used overlays and on disk storage
very intensly to get around memory shortfalls. Additionally PC even
early
on were rift with code bloat (8080 lofted code tended to expand) and it
was
deemed a requirement to have more than 64k mostly due to the OS eating
most of it. At the time 256k was enough and it was felt (just like a few
years before when z80 64k was plenty) that was enough and if not 640k
would insure enough space. This is true also due to the segmented
addressing the 8088 used, it was still largely a 8/16bit cpu with 16bit
basic
addressing. Apps didn't grow well until the 286 memory style and more
aptly the 32bit 386 appeared.
An aside, non PC 8088/86 systems used to permit a full 1 MB of ram
via rom shadowing or added a mmu to extend beyond 1mb. So Billy boy
was really refering to those system that were promoting the full 1mb or
larger memory maps.
Allison
I received the following e-mails offering two QX-10s to (a) good
home(s). Please respond directly to their sender if of interest
to you, though I am willing to play a minor intermediary role if
that seems productive.
- don
====================================================
On Jul 11, 10:19, CLASSICCMP(a)trailing-edge.com wrote:
> Stupid chemistry question from someone who took too many physics classes
> and not enough chemistry:
>
> What's the difference between trichlorotrifluoroethane and
> 1,1,2-trichloro-1,2,2,trifluoroethane? Are they different names
> for the same stuff, or two different stuffs?
Just the positions of the various halogen atoms relative to each other.
The 1,1,2 form specifies a particular arrangement, the other is
non-specific.
Schematically, this is 1,1,2-trichloro-1,2,2,trifluoroethane:
Cl F
| |
F--C---C--Cl
| |
Cl F
In other words each carbon atom has one halogen of one type and two of the
other. There's one other possible arrangement[1]; where all the chlorine
is on one carbon, and all the fluorine is on another, which would be
1,1,1-trichloro-2,2,2-trifluoroethane. I've no idea if that makes any
significant difference to any of the properties you and I would be
interested in, but I suspect not, and that most trichlorotrifluoroethane is
a mixture of the two.
[1] From my 2-D ASCII art, you might think there are other arrangements, eg
swapping the position of the fluorine for one of the chlorines on the first
carbon atom. However, if you think 3-D, and imagine the carbon as one apex
of a triangular pyramid (meeting the second carbon at the apex of another
pyramid) and also realise that the carbons can rotate relative to each
other, you'll see that all the other permutations are equivalent.
BTW, this is iso-propyl alcohol:
H
/
H O H
| | |
H--C---C---C--H
| | |
H H H
You could also call it 2-hydroxy-propane, or propan-2-ol. The O-H group is
what makes it water miscible (in fact, it's mildly hygroscopic), and of
course it's also highly flammable, unlike the chloroflurocarbons. To get
ordinary ethyl alcohol, chop off one of the carbons and two corresponding
hydrogens.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
