Last week my brother found me something (usually I am the one finding
'stuff' for him. An overhead projector LCD unit! (circa 1987 so it's
on-topic). It's a monochrome unit that approximates colors via greys but bhe
really cool thing about this display is it's inputs: RGB and Composite Video!
So next time I drag one of my Commodore 8-bits for a demo I have a an overhead
display unti that works with it! (tested it with a Commodore 128 -in 64 mode-,
the screen just fits in the visible area.) (manufacturer Computer Accessories)
00100111101010010010010011100100100001110010111001001001
Andre Fachat, another Commodore PET enthusiast has just opened his 'PET
Index'. Much of it is on his latest toy the CBM 8296 (the last of the PET
line -I think even after the SuperPET-) includes links to other valuable PET
information (such as my PET FAQ). A good place to bookmark if you have any
interest in PET computers:
http://www.tu-chemnitz.de/~fachat/8bit/petindex/petindex.html
00100111101010010010010011100100100001110010111001001001
As far as anyone ever seeing a 2.8 mb floppy drive, yes, a friend of mine
has one, for the Commodore 8-bit! Creative Micro Designs (CMD) a thriving
Commodore peripheral, expansion, and accererator manufacturer for the
Commodore 64/128 had used them for the FD-4000 series disk drives. The drives
use ED (extended density?) disks (the high density hole is farther down than
on HD disks and there is an ED on the casing.) Unfortunately CMD had to drop
the line a couple years back due to the drive manufacturer dropping the model
as there was not a big enough demand for them. :/
--
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
Larry Anderson - Sysop of Silicon Realms BBS (300-2400bd) (209) 754-1363
Visit my Commodore 8-Bit web page at:
http://www.goldrush.com/~foxnhare/commodore.html
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
<I acquired a TRS-80 VOXBOX last week. It is in the original box
<with cable, interface box, mic, and three casette tapes. I remember
<when RS was selling these. Has anyone ever used one? Did they actually
<work?
<
<Any historical insight is appreciated.
It speaks, classic mechanical sounding speech. Rather fun to play with.
Allison
<The accompanying lab workbook for the _The Art of Electronics_ is
<worth obtaining for getting the "Write-Only Memory" datasheet, too.
<My favorite graph on the data sheet is "Number of pins remaining
<vs. number of socket insertions". (Wasn't this originally published
<in an April 1 issue of _Electronics_ in the 70's?)
I got my copy of that data sheet as an official looking Signetics data
sheet along with the data books circa 1972. It was the EIA/IEEE spec'd
spigot in the lower right side of the device logical drawing. IT went
well with the ISO bit bucket. ;)
Allison
On Apr 6, 17:15, Max Eskin wrote:
> Subject: Re: math coprocessors
> [Autocad not requiring math coprocessor]
> Well, version 12 for Dos, which is what I have, seems to require it.
> It refuses to start up, quitting with "80x87 required, but not
> present". Whoever said it doesn't, maybe you have a lower version.
> If so, which and what's it like? I would certainly be interested in
> an older version, such a 7 or 8.
Even fairly old versions require a maths copro. Some of my then-colleagues at
Acorn Computers were involved in negotiations with Autodesk in 1987, to get it
ported to the ARM architecture. AD ported Autosketch quite quickly, because it
doesn't need a maths copro, but they refused to port AutoCad, because they
insisted a maths coprocessor was essential (despite the fact that the software
routines available outperformed some contemporary maths processors).
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
(This is a follow-up to an earlier posting, but with some corrections
and further information.)
I recently acquired an old Macintosh II. In it was an older SuperMac
video board. Based on the pictures on Radius' web site, I have concluded
that this is a Spectrum/8 (original), Part # STD9411, Assy #
1002689-0001.
The label on the ROM reads:
SUPERMAC TECH
SPECTRUM D6
1002690-B 1986
According to Newer`s SlotInfo program, The card revision is 1.0B9 and
has a part number of VGB-1.
Per Radius' FAQ, I have tried holding down the OPTION key while booting,
but
never got the "round robin" video mode selection. I have also tried
running SuperVideo 2.7.5 which tells me I must have ROM version 1.9 or
later in order to select a monitor.
Currently, the card seems to be "stuck" in what I assume is the default
mode of 1016x768.
So, does anyone have:
1) Info on how to get the card into other modes (pref 640x480 for now).
2) Setup software for this old a card.
3) Any info on support monitor resolutions and frequencies?
Thanks in advance...
<<<John>>>
> > Generally for the old machines we talk about on this list, the chip type
> > code is easy to differentiate from the date code, because of the
> > prevalence of 7400-series TTL chips. Any 74xx or 54xx number will be the
> > chip type, while the other number will be the date code.
>
> Until you get a machine built in 1974 :-). It's happened to me, it's
> mentioned in 'The Art of Electronics', and it's doubtless happened to
> others here.
Too right. And they don't half misbehave when you mistake the date code for
the logic function :-)
I've got a large boxful of TTL with 74 date codes. Trouble is, I *still* can't
tell which is which on one or two of them, just by looking.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Has anyone noticed any problems with the list dropping msgs ?
For example I posted some replies to the "Good find" thread and never
saw them. I see there was also a "Hyperion" thread which from Jason Pero's
reply I presume was posted by Doug Yowza (sp ?). I figured at first it was
just a glitch in my upload, but the "hyperion" miss says something else.
I'll have to check this with my ISP, if no one else is having this problem.
thanks larry
lwalker(a)interlog.com
re my own message:
In a search of comp.sys.tandy I have found that the Dick Smith System 80
(TRS-80 Model 1 clone) was known as the PMC-80/81 in the US if that helps.
Phil
Well,
The prognosis is not good for the Cadnetix system. I have tracked down a
couple of engineers from the original company (Which was bought by Daisy,
bankrupted, and bought by Intergraph) working at various places and no one
seems to be able to help. The two most common responses are first that I
am some kind of lunatic for wanting to get a proprietary circuit-design
workstation running, and second that any and all technical/engineering
documents for all Cadnetix hardware is compost in a Colorado landfill. One
of the binders that I grabbed with the system was the maintenance record,
and tells a dismal tale of constant board replacements for various
failures (no wonder they went broke), including a description for what is
happening now. The final result that time? After replacing the drives,
replacing all of the boards, and checking all jumpers and cabling,
Cadnetix just shipped out a newer unit to replace it. Oh well. One
interesting note is that this document has some monetary figures on it;
this company was paying over $16K a year to lease a 68020 with 4megs of
ram and 240megs of storage (2 80meg HD's and the 80meg Cipher), circa
1986.
I was told by one legacy dealer that my Pertec-interface Cipher C880 is
worth about $50 to scrap dealers. He then offered me a complete IBM System
36 with drives,tapes,interfaces, etc., that I'm going to pick up this
week. BTW, does anyone have an extra pertec-to-scsi adapter laying
around in the closet? ;)
Aaron
At 03:57 PM 4/2/98, you wrote:
> Actually the machines are the same size. The PF keys are deeper on the
Um, no... The 102 is thinner than the 100. That's one of the photos I
took t'other day for my m102 page (getting 'em developed this week, then
gotta scan them (gotta un-bury the scanner first), then get all the data
files ready...) I'll post the pictures as soon as I get them scanned.
(P.S., for more images than you can get to properly, check out
<http://www.sinasohn.com/clascomp/images/> -- you'll see the directory
listing of all the images I have so far.)
> 7) A telephone cable to connect the MODEM in one of these to a standard
>phone jack. It has a 8 pin DIN plus that fits the MODEM post and two phone
>cords coming out of it. There is also what appears to be a dummy female
>connector that fits over the male connector.
The idea was to be able to leave it in place:
Wall|=--------.----------=|phone
|
m100
If the m100 was connected, the phone was not. The dummy female connector
simply shorted the appropriate wires so the phone would work again.
> I will take $50 plus shipping on the computers ($40 for the one missing
>the label) and best offer on the extra pieces. Or I will trade for HP
Since I have 3 m100's, a m102, and 2 NEC 8201a's, I'll let other take
advantage of this... 8^)
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.sinasohn.com/
