Keeping the discs on the spindles will slow the rate of deterioration!
Since the discs in the middle of the stack receive less UV and less
airflow of ozone or oxygen.
Would storing in a cold dark vacuum extend the shelf-life?
On Wed, 1 Feb 2023, Ali via cctalk wrote:
But does that matter? If the main purpose is to be able to refresh the
data so it is readable does it matter that the data is not in the same
block as long as it is readable?
Ah, but most of that sort of memory has a finite number of cycles, and
wears
FILE1.ZIP+FILE2.ZIP+FILE3.ZIP+FILE4.ZIP+FILE5.ZIP COMBINED.ZIP
THAT will give you a corrupted file!
Concatenated copy (COPY with '+') has a behavior that you need to take into
account.
PC/MS-DOS 1.00 kept track of the file size with a course granularity. (logical
sectors, not bytes) Therefore,
On Wed, 1 Feb 2023, Zane Healy via cctalk wrote:
You have that right Sellam, the more that I look into this, based on
Fred’s info, I think that I need to get MS-DOS running under DOSBOX-X.
Probably worthwhile.
Although the truncation of file content after EOF during concatenation is
somewhat
How does ChatGPT say to do it?
How does ChatGPT say to do it?
On Thu, 9 Feb 2023, Tapley, Mark B. via cctalk wrote:
Where can I buy that bumper sticker?
Ask ChatGPT where to buy it.
Ask ChatGPT how ChatGPT could protect itself from being turned off.
Ask ChatGPT how ChatGPT could take over running the world.
There are some older folks on the list, so this is a good time to talk
about internet safety.
. . . and maybe a [youtube?] tutorial on sucking eggs?
If in doubt, GOOGLE THE WEBSITE, and see if valid websites link to
On Thu, 9 Feb 2023, Angel M Alganza via cctalk wrote:
In my opinion, one of the first things to do to try to stay safe out
there, if not the first, is to stop using that website and use one
that doesn't track what you search, t
On Thu, 9 Feb 2023, Eric Moore wrote:
I am very sorry to anyone I insulted. My tone was condescending. My only
intention was sincere concern for any fellow travellers who may be reading.
Not to worry.
We know your intentions were good.
We just get defensive about implication that being old and
Remember Datasync?
World Power Systems?
Colonel David Winthrop?
Jim Anderson?
Norman Henry Hunt?
('course those who are NOT "elderly" won't know of it)
https://medium.com/@madmedic11671/forgotten-fraud-world-power-systems-e11320aa681d
http://www.trs-80.org/world-power-systems-fraud/
a "bust out
If in doubt, GOOGLE THE WEBSITE, and see if valid websites link to it,
if
[...]
Stay safe out there :)
In my opinion, one of the first things to do to try to stay safe out
there, if not the first, is to stop using that website and use one that
doesn't track what you search, that doesn't show
On Sun, 26 Feb 2023, Chris Zach via cctalk wrote:
Install DOS and Format.exe on a 3.5 floppy Fire it up and when running
QRST try selecting the "B" drive. That used to (on a single disk system)
prompt you to switch floppies back and forth which *might* work,
allowing me to write the image on a
Which versions of DOS let you boot off B: ?
CORRECTION:
Although the default of DOS used to be A: then first HDD (usually C:), it
is the computer firmware, not DOS that decides that.
The assumption that C: is the HDD can be annoying. I used to use PCs with
four floppies. If jumpered properl
For my students, I used analogies and visual aids.
1/48, 1/96 is a little hard for some to visualize.
"48 tracks per inch, is about half a millimeter spacing, with the actual
data being aabout a third of a millimeter wide.
96 tracks per inch is about a quarter of a millimeter spacing, with the
Then, I made the students describe how to make a 48tpi disk with a 96tpi
drive.
Whether to count their answers as acceptable or not was mostly just the
understanding of need for "bulk erase"/"virgin disk"
On Mon, 27 Feb 2023, Chuck Guzis via cctalk wrote:
One thing that folks need to bear i
It is also worth noting, that although not all "360K" diskettes are up to
the task, they will still be much closer than "HD"/"1.2M" diskettes!
"360K" diskettes are 300 Oersted
"Quad density" diskettes are also 300 Oersted. The only difference is
that "QD" diskettes are tested for 96tpi, where
Chuck once told us that DRIVPARM can be coerced into working on some of
the systemes that it won't work on, by inserting some Ctrl-A characters;
DRIVPARM ^A^A^A /D:2 /F:2
BTW, FORMAT, DRIVER.SYS uses the tracks and sectors that you specify
FORMAT E: /T:80 /N:9
ONLY to select WHICH ONE from the
I sent this before, but it didn't show up on the list;
Part 1;
Which versions of DOS let you boot off B: ?
Obviously, NO command that you run in DOS (which would be after it has
booted), will change the boot sequence, which is before DOS is present.
Nor will such a change last through a boot
Resending
Part 2
BTW, for the parameters for DRIVER.SYS, you can abbreviate the /t:80 /s:9 to
"/F:2" (and later, "/F:720")
/0 was "360K"
/1 was "1.2M"
/2 was "720K"
anybody remember the numbers for 8"?
/d:2 meant you wanted the logical drive to use the third physical drive, /d:3
meant you wa
It is indeed strange that, MICROS~1 never seems to acknowledge the
existence of the NEC variant. And yet, it made sense to have the same
disk format parameters for three sizes of disk.
Unfortunately, the otherwise excellent table leaves out the lines for
DRIVER.SYS and FORMAT specifiers (if
Minor tangent:
decades ago, very briefly, several manufacturers, such as Canon,
introduced "dual" drives, that were the size of a regular floppy drive,
but with two slots, with two sets of heads, etc., for people who wanted
two floppy drives.
There were two variations, differentiated mostly,
Since we are never going to completely agree on
"First",
"computer",
"home computer",
"home computing", (using a a terminal with a remote computer)
might I suggest the works of Edmund Berkeley.
https://en.wikipedia.org/wiki/Geniac
https://www.instructables.com/GENIAC-Electric-Brain-Replica/
Ful
I got into it from EAM/cards.
In 1970, I was working at National Space Sciences Data Center, building 26
at Goddard Space Flight Center. Doing gofer work for a British physicist
studying the Van Allen belts, as part of an on-site contract. FORTRAN,
APL, Gerber digitizer, and plotters (Calcom
About eight years later, I bought a TRS80 for $398. Yes, you could buy
it without the video monitor and cassette recorder.
If I had a little more spending money, I might have gotten a PET, instead,
or, not much later, but more money, an Apple2.
Those were absolutely not the first home computer,
On Thu, 9 Mar 2023, Sellam Abraham via cctalk wrote:
It seems to come down to agreement (or lack thereof) on the definition of
"personal computer".
Somehow I feel like this debate has been had before. Probably here.
Probably several times.
Sellam
It is a permanent topic.
Along with "First".
(
On Thu, 9 Mar 2023, Steve Lewis via cctalk wrote:
A third criteria is that it was built as a consumer product - meaning not
just a hand full exist. The rationale here is that it is a "repeatable
product" and the process of how the thing was made isn't so esoteric or
obscure (or enough "productio
Most important of all, for the video,
your daughter should decide what parameters matter to her!
On Thu, 9 Mar 2023, Steve Lewis via cctalk wrote:
Sellam,
It seems to come down to agreement (or lack thereof) on the definition of
"personal computer".
One criteria to me is not so much about
On Thu, 9 Mar 2023, Steve Lewis via cctalk wrote:
Actually, to answer my own question: if "main frame" refers to the actual
framing... well the PDP-1, PDP-10, PDP-10 were minicomputers and still
required a lot of metal "framing" to set up. So, can't they be considered
mainframes?
(another notio
On Mar 9, 2023, at 5:20 PM, Murray McCullough via cctalk
wrote:
A lot has been written about the origins of the microcomputer. I wrote a
book on the topic. Many thanks for mentioning Canada. Whether one is
playing games or doing something else micro-computing is usually associated
with a microp
On Thu, 9 Mar 2023, Paul Koning via cctalk wrote:
That picture serves to remind us of the packaging and cooling genius
that went into the CDC 6000 series machines, which could fairly be
called the first supercomputers. Logic like that and more, but in a
much smaller package so it can run faste
On Thu, 9 Mar 2023, Sellam Abraham via cctalk wrote:
Jeri Ellsworth made integrated circuits in her garage.
I wonder how much challenge would be involved in making artisan batches of
5.25" or 8" floppy disks using cobbled-together or homemade equipment?
Is there ANYTHING besides floppy disks th
On Thu, 9 Mar 2023, Sellam Abraham via cctalk wrote:
Jeri Ellsworth made integrated circuits in her garage.
I wonder how much challenge would be involved in making artisan batches of
5.25" or 8" floppy disks using cobbled-together or homemade equipment?
In "Secret Life of Machines", season 2, e
On 3/9/23 18:40, Sellam Abraham via cctalk wrote:
I wonder how much challenge would be involved in making artisan batches of
5.25" or 8" floppy disks using cobbled-together or homemade equipment?
On Thu, 9 Mar 2023, Chuck Guzis via cctalk wrote:
Many folks have turned to emulators, abandoning
A word of warning, the "inertial rotation" procedure was great for
smaller drives, but you may break your arm applying this to an ESDI
:-)
Not necessarily.
Not all ESDI drives are physically large.
In one generic PC, I used an ESDI drive, that I bought used, with a WD -7
controller. It was a
On Fri, 10 Mar 2023, Kevin Anderson via cctalk wrote:
I always thought of the distinctions this way (from my basis of exposure
from late 1970s through the 1980s) and from a higher educational setting
primarily:
Mainframe = repairs required multiple technicians, some possibly there
full-time; r
OB_3-phase anecdote:
Shortly before I started teaching at the college (so I got all of the
details secondhand), . . .
They had a PDP (I don't even know what model) that they used for the
prograamming classes. But, they had constant problems with the
[after-market?] disk drive, so it was dow
OB_3-phase anecdote:
PG&E bought a replacement machine for the school district, on the
condition that all involved go along with a false story that it had been
a lighning strike!
On Fri, 10 Mar 2023, Chuck Guzis via cctalk wrote:
Doesn't seem to be an uncommon practice. I remember an electrici
OB_3-phase anecdote:
On Fri, 10 Mar 2023, Sellam Abraham via cctalk wrote:
That internet convention (OB) is so old now it's archaic, and vintage in
and of itself. Amazing.
You rang? (cf. Maynard G. Krebs)
The school district was thrilled to get the PDP. Then they had PG&E set
up the po
On Sat, 11 Mar 2023, Steve Lewis via cctalk wrote:
Hey all, was Delphi accessible as a bulletin board before 1990?
I'm only finding logos and info about Delphi post-1990.
But for early 1980s, what as Delphi? Was it a telnet-sort-of-thing only
accessed only from universities?
I've searched throug
On Sun, 12 Mar 2023, Sellam Abraham via cctalk wrote:
The Silicon Valley of old is basically dead. The magic is gone.
That being said, wherever you decide to go, you'll want to plan your travel
between a very narrow window of time (I don't know what it is anymore, when
I left it was between roug
On Mon, 13 Mar 2023, Tarek Hoteit via cctalk wrote:
The latest issue of Mad Magazine (April 2023) is titled “MAD Takes
Apart Technology”. The pages include reprints of past articles that
relate to computers, such as “if computers are so brilliant” (Oct
1985), “13 things you never want to hear f
On 3/14/2023 3:03 AM, Curious Marc via cctalk wrote:
The cafeteria is open, there is a Starbucks and even a nice Italian across
the street if you want to treat yourself. On Wednesdays we have a demo of
the IBM 1401 at 3 pm, and before that the restoration team works on it from
10:30 am on (it n
On Sat, 18 Mar 2023, Nigel Johnson Ham via cctalk wrote:
Just like Anacin and Anadin - when things move across international
boundaries,local copyrights are a mess!
In USA, copyright and trademark are handled by two different departments.
Copyright registration is handled by Library of Congres
How can we have "Happy Computing!", when amount of memory, speed, and chip
density will no longer double every eighteen months?
With Moore gone, who will enforce his law?
Hardware will no longer be able to keep pace with software, particularly
Windoze, whose requirements continue to double. U
My floptical drive (20MB SCSI) could also handle 1.4M
My 2.8M drive (Micro-Solutions "Backpack" parallel port) could also
handle 1.4M
My LS120 (IDE) could also handle 1.4M
My Amlyn drives (disk-changer with 5 disks) was 1.2M per disk. The
disks in the changer cartridges were 1.2M, with an
Sure; consider the very common Samsung SFD-321B, particularly page 5:
. . .
Another type of "tri-Density" drive is the fairly common Teac FD-235J,
which can do 720K, 1.44M and 2.88M. I've got a couple installed in
older systems.
On Tue, 28 Mar 2023, Ali via cctalk wrote:
I don't know if we a
On Tue, 28 Mar 2023, Ali via cctalk wrote:
https://auctions.c.yimg.jp/images.auctions.yahoo.co.jp/image/dr000/auc0
312/users/4f92de2852282d0c4055f15836cd43f760275f36/i-img1200x675-
1672137143s8ehmb271085.jpg
Looking at this picture it indicates the disk is 406TPI which is
significantly higher
"1.4M" disks (1,474,560 bytes of data / 1.474 SI Megabytes / 1.40625
Mebibytes) are often called "1.44M", because that number is derived from
1,024,000 bytes per "megabyte" (2^10 * 10^6, 1000 * 1024), giving 1.44.
I can find no defensible reason for that corrupted size for a "megabyte".
Therefore,
On Tue, 28 Mar 2023, Chuck Guzis via cctalk wrote:
The shipment that was being returned via Fedex, was, in fact 70 8 inch
diskettes, ca. 1983--all read just fine.
I guess that's a concern for our current removable media, be it Blu-ray
DVD, USB pen drive, microSD card, or cloud. I wonder how muc
"2.8M" has an unformatted capacity of 4M
The disk that you linked a picture of says "406TPI"!
Therefore, it presumably has about three times as many tracks. (240?),
which, if it does a 1,000,000 bits per second, with track density the
same as "2.8M",
That should read "density within each track",
On Thu, 30 Mar 2023, Chuck Guzis via cctalk wrote:
Absent any alignment issues, or dirty heads, just about any HD drive
(e.g. Teac FD235HF) is equally facile in both DD and HD media. Quite
often, a DD-only (e.g. Teac FD235F) drive will have performance inferior
to that of the HD-DD drives.
Other
Thu, 30 Mar 2023, Chuck Guzis via cctalk wrote:
On 3/30/23 10:48, Fred Cisin via cctalk wrote:
The drives in many IBM PS/2 machines don't seem to have a media sensor,
so they can't tell the difference between "720K" and "1.4M" disks.
"720K" is about 600
On Mon, 10 Apr 2023, Murray McCullough via cctalk wrote:
45 years ago this month Intel revealed the 8086 processor which became x86
technology that formed the backbone of PC technology. The 8-bit era came to
an end about 7 years later. For classic computing a new era began.
Some might enjoy a
On Mon, 17 Apr 2023, AT&T Customer Service via cctalk wrote:
Sorry, I forgot to post the location. I'm in Kent, Washington. USA.
disregard the AT&T customer service. Have E-mails in to them. not sure
what going on there, but its at&tso anything is possible.
With a user name of "AT&T Custome
On 2023/04/18 9:40 a.m., Tony Duell wrote:
The blown out resistor likely has "blown out" for a reason.
The replacement will probably suffer the same faith unless you find the
root cause.
Isn't there usually a larger, more critical component, such as a
proprietary microprocessor, to blow out to
On Fri, 21 Apr 2023, Murray McCullough via cctalk wrote:
I read today that “Maximum PC” is no longer in print just in digital. Past
issues are available in digitized format but it’s not the same as reading a
magazine while in bed! Our hobby is changing. Well, progress must not be
stopped…
Happy c
On Tue, 25 Apr 2023, Sellam Abraham via cctalk wrote:
Little old Billy G?
lol, like he gives a shit. He's too busy selling his snake oil and figuring
out ways to turn bugs and chemicals into your next meal.
I literally should have strangled him to death when I had the opportunity.
Naah.
Turn hi
On 5/4/23 13:23, geneb via cctalk wrote:
You can get free access via http://www.eternal-september.org/, however
they don't carry any binary groups. (no loss really)
On Thu, 4 May 2023, Chuck Guzis via cctalk wrote:
That's useful to know--I haven't been on usenet in perhaps 40 years.
That's O
The iconic quote was Tannenbaum's "Never underestimate the bandwidth of a
station wagon full of tapes hurtling down the highway."
On Fri, 5 May 2023, steve shumaker via cctalk wrote:
There used to be a running joke in the test center on Kwajalein Atoll about
the C141 full of mission tapes hav
On Tue, May 9, 2023 at 1:03 PM steve shumaker via cctalk <
cctalk@classiccmp.org> wrote:
A mostly similar variation has it that they shipped the unit via Railway
Express Agency (remember REA??) and as the story goes, it was in
transit when REA closed their doors unexpectedly and with no warnin
On Tue, 16 May 2023, Wayne S via cctalk wrote:
Tony in response to your original idea of wanting to download images for
use on you existing machines ( did i get that right?), i think you have
everything you need already. Download the images to your win 8 box then
use file transfer software (ker
On Tue, 16 May 2023, Wayne S wrote:
Fred, glad you chimed in.
If you have the original post, Tony wants to download different things images
for those machines, probably from the internet and use the software on those
machines via floppy. As another item, he acquired a coco computer hard disk
On Tue, 16 May 2023, Mike Katz via cctalk wrote:
Most likely there was some kind of driver for the CoCo that converted
the ST-251 into smaller logical drives for the CoCo Operating system.
One fellow, who used to be involved in Cocos, recalls one or more systems
that handled it by MANY "virtua
ue, 16 May 2023, Mike Katz wrote:
The biggest drive I remember seeing on OS/9 was 20MB or 40MB. I
don't remember the File Allocation Table size or format.
On 5/16/2023 7:14 PM, Fred Cisin via cctalk wrote:
On Tue, 16 May 2023, Mike Katz via cctalk wrote:
Most likely there was some kind of
The biggest drive I remember seeing on OS/9 was 20MB or 40MB. I
don't remember the File Allocation Table size or format.
Well, that would be "spot on", as the formatted capacity of an ST-251 was
40 Megabytes.
When used with MS-DOS, prior to
MS-DOS 3.31, it would be partitioned as
two 20MB,
Similarly, he could buy a cheap external USB 3.5" drive. Write content to
that drive on the modern machine, and read those floppies on the older
machines. The readily avaailable one have firmware that only supports
720K, 1.4M, and [sometimes] NEC-style "mode 3".
On Wed, 17 May 2023, Tony Duell
What they won't handle are DD formats that don't use the standardPC
disk controller: Amiga disk, DD Mac disks, etc.
The few external USB drives that I have tried can't even handle most of
the stuff that a standard PCdisk controller can. Their firmware is locked
in to a few specific formats, w
As for the target machine having a serial port, one of the machines I
want to get stuff onto is an Osborne 1A. The serial port on that is
horrible.
On Wed, 17 May 2023, Robert Feldman via cctalk wrote:
For CP/M computers such as the Osborne, you can read and write their
diskettes on an MS-DOS c
On Wed, 17 May 2023, Mike Katz wrote:
If you have access to a Gimix SS-50 6809 or 6800 system, Gimix used the
WD1791 in their double density disk controller. That controller can do
single and double density 5 1/2" and 8" disks (250KHz, 500KHz & 1MHz data
rates).
Some NEC 765 controllers, inc
That is because Amiga uses GCR recording rather then FM or MFM.
On Thu, 18 May 2023, Peter Corlett via cctalk wrote:
Nope. You may have gotten confused with the Commodore 64 drives, which
were very Special, or perhaps early Apple gear.
The Amiga's disk controller supports both GCR and MFM, bu
The earliest Osbornes were single density with ten 256 byte sectors per
track. I was able to write some code on TRS80 model 1 to read those.
Many PC FDCs, including the IBM 5150/5160, can not do FM/single-density.
Then Osborne came out with a "double density upgrade". The
MFM/Double-density Osbo
On Thu, 18 May 2023, Robert Feldman via cctalk wrote:
Can you fix it using MODE.com from a DOS prompt?
Or, a full re-install of the USB-RS232 dongle?
Long ago, I learned, the hard way, that I should always make a complete
backup, or at least a restore point, before installing anything new,
My advice: buy an old desktop computer. Buy a standard PC floppy drive
(a dual drive if possible to give both 3.5 and 5.25 support).
Hmmm.
a modern laptop for connecting to the interwebs.
with sneaker-net of thumb drives to:
a 386 desktop running Win98SE (first version to support USB), with flo
Can you fix it using MODE.com from a DOS prompt?
Or, a full re-install of the USB-RS232 dongle?
On Thu, 18 May 2023, Tony Duell wrote:
Depends on what you mean by a re-install...
Asking Windows to check the driver and install the correct/latest one
did not help.
rarely does
Deleting the d
On Thu, 18 May 2023, Chuck Guzis via cctalk wrote:
The idea's the same. What I'm a bit surprised about is that there has
been no emulation of a generic floppy controller offered. It can't be
that complex; if I recall correctly the NEC 765 only used 1100 words of
microcode.
That is exactly wh
On Thu, 18 May 2023, Chuck Guzis via cctalk wrote:
The idea's the same. What I'm a bit surprised about is that there has
been no emulation of a generic floppy controller offered. It can't be
that complex; if I recall correctly the NEC 765 only used 1100 words of
microcode.
That is exactly wh
On Fri, 19 May 2023, Liam Proven via cctalk wrote:
I do remember that, because I carried around a USB key with an
assortment of service packs, IE installers, etc. and it was sooo
slow to copy W2K SP4 onto a machine -- until you had SP4 installed...
At that point in time Windows Me was essent
On Sun, 21 May 2023, Robert Feldman via cctalk wrote:
My main computer is a 15-year old Dell Precision T3400 (Core 2 Duo). It can handle
multiple floppy drives, but the BIOS does not allow 360KB 5.25" disks, only
1.2MB in that size.
Does it support "720K" 3.5"?
If so, then the hardware can ha
On Mon, 22 May 2023 at 10:40, Tony Duell wrote:
I am sorry, but I think this is a stupid suggestion for many reasons.
And
of course it has to have the right type of disk controller, I
certainly need to be able to handle single-density (FM) reading and
writing correctly. Some machines can, some c
On Thu, 25 May 2023, Sellam Abraham via cctalk wrote:
Tom,
You may save yourself some time with this nifty contraption ==>
https://www.ebay.com/itm/303620862566
It's a floppy disk cleaning apparatus. You place the floppy disk into the
frame, apply your cleaning solution and cloth to the index op
On Tue, 28 Mar 2017, Systems Glitch via cctalk wrote:
Then it's a regional thing.
"Scrounge up," or to "scrounge around," is certainly commonly used to
mean, "find something in a pile of mess" in the southeastern US. Mostly
equivalent to "scare up."
California: "Scrounge the keyboards, memor
On Tue, 28 Mar 2017, Rob Jarratt via cctalk wrote:
I have not had any emails from cctalk for 2 or 3 weeks. I went to my
subscription details and saw that emails were disabled for me. I re-enabled
them a few days ago but I still have not received any new emails. I can see
that there is traffic by
When I did media conversion for people, I ignored their content, other
than monitoring for quality control.
Same as when I used to do photographic color printing, and did some for
other people.
Anything else would be seriously unethical.
THAT is simple professional ethics.
Otherwise, it's on a
How do you feel about reading dead presidents personal letters? At some
point personal information ends up being historic information.
The item in question seems to be ten years old.
THAT doesn't sound like "historical" can or should over-ride current
rights holders.
At some point, "grave rob
On 29 March 2017 at 17:05, Toby Thain via cctalk wrote:
But you must have overlooked the intransitive definition below: "to search
about and turn up something needed from whatever source is available".
I'm pretty sure that's the sense Jim was using (and it's certainly not
restricted to North Ame
It's amazing how isolated pockets of our cultures can be from each
other! "Multiple peoples divided by a common language"
On Wed, 29 Mar 2017, Chuck Guzis via cctalk wrote:
This is something that continually delights me, from the time that I was
ridiculed by the downstate Hoosier farmers' sons
Bonus points for those who remember their original original location.
Across from the side of the road that original Frys was on was a TOGO's that
filled the parking lot and 2 or three nicely stocked junk stores, which
changed frequently. The guys who did the Hard Disk drive guide book had
t
On Thu, 30 Mar 2017, jim stephens via cctalk wrote:
Across from the side of the road that original Frys was on was a TOGO's that
filled the parking lot and 2 or three nicely stocked junk stores, which
changed frequently. The guys who did the Hard Disk drive guide book had
their original store
On Thu, 30 Mar 2017, Chuck Guzis via cctalk wrote:
I recall when John Fry opened his store, the big seller was Canfield's
Diet Chocolate Fudge Soda. I thought it was dreadful, but people
bought it by the caselot. Fry's had a lot of Everex PC boards, much of
which was probably returns. And yo
On Mon, 3 Apr 2017, Chuck Guzis via cctalk wrote:
I'm probably showing my age (again), but "QIC" and "Supercomputers" just
seems to be about as related as "Chateau Margaux" and "Cheez Whiz".
If one is spending millions on a supercomputer, why would anyone want to
put software for it on a QIC car
I'm sure that many (ARD?) are rolling their eyes at THAT concept of
"computer design".
On Mon, 3 Apr 2017, Liam Proven via cctalk wrote:
This series of articles focuses mainly on physical design, of cases
and so on, but there are some technical details in the articles too.
OK, they link that
On Tue, 11 Apr 2017, Jecel Assumpcao Jr. via cctalk wrote:
These are all very good points. I agree I was exagerating by saying the
iAPX432 and 8086 couldn't run C.
Or were you implying that nothing worthwhile has ever been written for
80x86 (in ANY language?)? That would be harder to argue w
Because "evil" and "successful" are not mutually exclusive.
of which I don't know. It is a 40 pin to 50 pin ribbon cable with a
black box connecting them that is labeled TANDY. I know of nothing
the Tandy made that used a 50 pin connector other than a hard disk.
On Wed, 12 Apr 2017, Parent Allison via cctalk wrote:
Maybe...
The only device I know of l
Model I Hard Disk Adapter (40 to 50 pin):
http://prof-80.fr/interface-hd-modele-1-n-26-1132
On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote:
Nope, it's none of those.
Can you describe in what ways it differs?
On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote:
The PC board shows two resistors and two transistors. Mine has
four resistors and two disk capacitors.
Obviously not even similar.
Possibly very similar, Have you counted the pin numbers to determine
which traces the parts are connected t
On Fri, 14 Apr 2017, Peter Cetinski via cctalk wrote:
The EI expansion port was originally called the Screen Printer port
because that was the only accessory that connected directly to the
TRS-80 bus.
Originally.
Later, the Voice Output device (repackaged Votrax?) used the bus
connector.
La
On Fri, 14 Apr 2017, Peter Cetinski wrote:
Lot’s of 3rd party devices that connected to the bus appeared soon
thereafter. A few interesting ones I have other than the Voice
Synthesizer and the Vox Box
Those were sold under the Radio Shack name. There were also some similar
and better ones f
On Fri, 14 Apr 2017, Bill Gunshannon via cctalk wrote:
Well, I don'c consider something passive (having only inert parts) to be
similar to a device with active parts, but that's just my opinion. :-)
dissimilar designs can be done for functionally compatible systems.
Mine is 40 pin to 50 pin,
have a cartridge for the APL on the VideoBrain. He considers it
more valuable than gold and won't let anyone look at it or
dump its contents.
On Fri, 14 Apr 2017, Toby Thain via cctalk wrote:
I never understood this self-defeating attitude. What's supposed to happen
when they pass on?
Those ha
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