On Thu, 23 May 2024, Chuck Guzis via cctalk wrote:
I couldn't wait to show it to a female working in my section. She
dropped by my apartment, took one look at the thing sitting on my
kitchen table and burst out laughing. "That's not a computer; it's a
toy!" was her withering reaction.
I don't
On Sun, 19 May 2024, Will Cooke via cctalk wrote:
I have a couple of 70s/80s "home" computers (e.g. Radio Shack Color
Computer) that are intended to connect to a TV set. They don't have
easily available composite video, even internally, only modulated RF
output. Currently I have an old CRT TV
https://www.swpc.noaa.gov/products/aurora-30-minute-forecast
stormy sunny weather
On Fri, 10 May 2024, Charles via cctalk wrote:
Regarding protections, it didn't have many. I remember spending a day
tracking down a fatal bug with a logic analyzer (emulators were still a dream
in this small company)... another programmer had used an array subscript out
of range and the
Microsoft had to pay $120 million, and Stac had to pay $13.6 million.
But Microsoft also settled some claims out of court with a $39.9 million
dollar investment in Stac, and paid $43 million in royalties.
Yes, billg had a bad day. comparable to my losing $100
On Fri, 10 May 2024, Sellam
, billg had a bad day. comparable to my losing $100
IBM's PC-DOS 6.10 had a similar bundle list to MS-DOS 6.00, but each
product from a different vendor than Microsoft's
On Fri, 10 May 2024, Fred Cisin via cctalk wrote:
. . .
very slow and buggy. I heard a story that to speed up disc access, MS put
FAT-manipulation code in the actual compiler and that occasionally
destroyed the FAT.
Sorry Stuff, ain't so.
If you had FAT corruption issues, perhaps you had SMARTDRV enabled with
write cacheing (which did occasionally
On Fri, 10 May 2024, Stuff Received via cctalk wrote:
I recall that MS sold a Pascal compiler, possibly from someone else. It was
very slow and buggy. I heard a story that to speed up disc access, MS put
FAT-manipulation code in the actual compiler and that occasionally destroyed
the FAT.
...
I've written code in Pascal, as well as Modula-2. Never liked
it--seemed to be a bit awkward for the low-level stuff that I was doing.
On Thu, 9 May 2024, Paul Koning via cctalk wrote:
Not surprising, since that's not what it is all about. Both, like their
predecessor ALGOL-60 as well as
Turbo-Pascal was quite popular. At the annnouncement of it (West Coast
Computer Faire), Phillipe Kahn (Borland) was so inundated with "yeah,
but what about C?" questions, that by the end of the first day, "Turbo
C is coming soon"
On Thu, 9 May 2024, Sellam Abraham via cctalk wrote:
I
OK
This seems to be the one that the list choked on
(possibly due to special quote characters?
On Thu, May 9, 2024, 2:07 AM david barto via cctalk
wrote:
At Ken Bowles retirement from UCSD (Ken was the lead of the UCSD Pascal
Project) he related a story that IBM came to UCSD after being
UCSD P-system could only allocate contiguous disk space. So a disk that had
become "checkerboarded" by writing and deletng files had to be defragmented,
using a spplied utility called "Crunch".
Was that adequately protected against catastrophes caused by interruption?
Softech and UCSD
At NCC - Anaheim, I bought John Draper lunch (I never exercised with him) for a
quick consultation about P-system directory structure. I added some P-system
formats into XenoCopy a week later.
Turbo-Pascal was quite popular. At the annnouncement of it (West Coast
Computer Faire), Phillipe Kahn (Borland) was so inundated with "yeah, but what
about C?" questions, that by the end of the first day, "Turbo C is coming soon"
The SAGE II that had native Pascal (68000) was
not a popular machine. Waterloo Pascal on the SuperPetPascal never
really made it on the microcomputer platform did it?
Bob Wallace (Microsoft's tenth employee) wrote the Micorsoft MS-DOS Pascal
compiler. He told me not to use the runtime
Did not make it to the list, so I am breaking it up and re-sending it in
pieces
Without doing the research before asking, there was the UCSD p-System
Pascal for IBM PC which came out very early in the history of the IBM PC.
It was not very popular.
In the original 5150 launch (August 1981),
On Thu, 9 May 2024, Mike Stein via cctalk wrote:
How much extra to turn my deadly lead pipes into gold while you're here?
Alchemist servicess are kinda expensive.
Could you get away with just gold plating them?
German snake oil wizards to the rescue! The "Atomstromfilter" (nuclear
power filter) joke product has been making the rounds in Germany for
at _least_ 20+y now: https://traumshop.net/produkt/atomstromfilter/
It claims to filter power generated by nuclear power plants out of
your power flow at the
More here:
https://www.enjoythemusic.com/magazine/equipment/0114/audiophile_ac_outlets.htm
If I knew that this stuff wasn't real, I'd figure that it was an April
Fool's prank.
On Wed, 8 May 2024, Sellam Abraham via cctalk wrote:
Why stop there? A truly dedicated audiophile would run new pure
also, what some hinted at is the issue is even a very slight amount of
magnitsm, spinning very fast, could affect the signal in the playback
head
How many Gauss would you get from vinyl, spinning at 33.3, 45, or 78 RPM?
'course, if the "demagnetizing" also included a wipe with a lint free
Tim Paterson's article "Inside Look At MS-DOS" is a good read.
On Tue, 7 May 2024, Ali wrote:
A good history and overview of DR including interviews from some of the main players by
the "Computer Chronicles":
https://youtu.be/bLVbSjDq0DE
It's good.
When that episode was first broadcast by
ere than MS-DOS)
-SteveL (v*)
On Fri, May 3, 2024 at 8:30 PM Fred Cisin via cctalk
wrote:
PL/M (think "PL/1") was a high level programming language for
microprocessors.
CP/M was also briefly called "Control Program and Monitor"
It was written by Gary Kildall. (May 19, 194
urutech-demag-a-lp-cd-cable-demagnetizer/
If my email for him still works, I have asked a relative that use to make a
then over $1000 (1970s?) crossover for subwoofers (50hz?) for the audiophile
market. Just the crossover (signal separator), not the amp needed after that.
--Carey
On Monday (05/0
Ignorant question:
Q: When looking for current availability of bulk tape/disk demagnetizers,
on eBay, I ran into a lot of CD/DVD demagnetizers
What kind of a problem do they have with magnetism?
Or is this like the DVD REWINDERS?
On Mon, 6 May 2024, Will Cooke via cctalk wrote:
A must-have
Ignorant question:
Q: When looking for current availability of bulk tape/disk demagnetizers,
on eBay, I ran into a lot of CD/DVD demagnetizers
What kind of a problem do they have with magnetism?
Or is this like the DVD REWINDERS?
Radio Shack used to sell a "Bulk Tape Eraser". I gave mine to the
college.
Those are on eBay, and even Amazon.
About 25 years ago, Radio Shack/Tandy changed the label and box, and
called it "Bulk Disk Eraser".
The college bought one, and discarded mine.
But, as everyone knows, the one
Yes, in those days, magazines were printed, and mailed out, or shipped to
newstands before their nominal date, in order to be delivered by their
nominal date. The intent was that people would have it by January 1st, so
it would arrive in late December.
So, the January 1975 one would have been
PL/M (think "PL/1") was a high level programming language for microprocessors.
CP/M was also briefly called "Control Program and Monitor"
It was written by Gary Kildall. (May 19, 1942 - july 11, 1994)
Gary taught at Navy Postgraduate School in Monterey.
He took a break in 1972, to complete his
Where would you fit the Tandy Model 100 in here?
On Fri, 3 May 2024, Gavin Scott via cctalk wrote:
The Model 100 had a great keyboard, a text editor, and a built-in
modem, and was apparently very popular among journalists who used it
to write and submit stories from the field.
So maybe it saw
Where would you fit the Tandy Model 100 in here? Ultimately it
supported a disk drive, ran basic and also sported an expansion box
that included video support and a floppy.
On Fri, 3 May 2024, Bill Gunshannon via cctalk wrote:
Ultimately, so did the TRS-80. At least Model I, III and 4.
and
Yes, Microsoft certainly did not invent linked list allocation.
But, the Microsoft implementation of the existing idea happened to be what
inspired Tim Paterson to do it.
On 5/3/24 11:05, Fred Cisin via cctalk wrote:
"Remembering his conversation at NCC with Marc McDonald about
On Fri, 3 May 2024, KenUnix via cctalk wrote:
Steve,
Where would you fit the Tandy Model 100 in here? Ultimately it supported
a disk drive, ran basic and also sported an expansion box that included
video support and a floppy.
-Ken
The Model 100 BASIC (puportedly the last product that billg
On Fri, 3 May 2024, Steve Lewis via cctalk wrote:
Microsoft BASIC appears on the 1979 NEC PC-8001, which includes disk drive
support (similar to the later additions to Commodore BASIC also around
1980). But in the NEC PC-8001 manual about BASIC, it refers to a "FAT"
format used on disks. So I
On Wed, 1 May 2024, Jim Brain via cctalk wrote:
Games are always a good draw, even if that seems like cheating.
In the early days of the Atari ST and Commodore Amiga, (and I may have the
two reversed in the following anecdote), Atari had a nice display of a
bouncing checkered beach ball.
Bring lots of business cards. Even if you aren't running a business, it's
a lot better than standing there writing your contact information for
everybofy that you want to stay in touch with.
paper, pens, pencils, post-it notes, stapler, duct tape, voltmeter,
batteries, flashlight, cash,
On Wed, 1 May 2024, Mike Katz wrote:
I remember replacing the character generator eprom (the type with the window
for UV erasing) on an old ATI EGA video board so that I could have the APL
character set.
sweet
At least one of the ATI EGA boards had a daughter board available to be
able to
On Wed, 1 May 2024, Chuck Guzis via cctalk wrote:
Yet FORTRAN, the granddaddy of them all, continues on... It should be
noted that FORTRAN celebrates its 70th anniversary this year:
I didn't start until May 29, 1965.
I had previously been doing some keypunching, and 084 counting sorter.
IBM
APL was incredible. I was amazed. I was immediately able to do a few
simple things that were useful for my boss and myself, and writing
simple programs within hours. Its matrix arithmetic was awesome. APL
typeball on a selectric terminal at GSFC, . . .
Some of the keys were re-labeled, but
On Wed, 1 May 2024, Chuck Guzis via cctalk wrote:
To be sure, BASIC was hardly unique in terms of the 1960s interactive
programming languages. We had JOSS, PILOT, IITRAN and a host of others,
based on FORTRAN-ish syntax. not to forget APL, which was a thing apart.
What would our world be like
On Wed, 1 May 2024, Mike Katz wrote:
I'm sorry but the original BASIC as run on the Dartmouth Time Sharing System
was compiled.
I wasn't around Dartmouth, and my first experiences with BASIC were all
interpreted.
I had run a trivial program in it on a Silent 700 connected through a
phone
I remember that one of the changes that "street" BASICs made was to make
the keyword "LET" be optional.
Thus, instead of writing
LET X = 3
you could write
X = 3
unfortunately, that further confused the issue of ASSIGNMENT versus EQUALITY,
and many beginners tried to write
3 = X
while they
On Wed, 1 May 2024, Murray McCullough via cctalk wrote:
Nostalgia keeps pressing ahead: It was 60 yrs. ago that BASIC came into
existence. I remember very well writing in Apple Basic and GW Basic later
on. As a non-compiled OS, an interpreted OS, it was just the right tool for
a microcomputer
On Tue, 30 Apr 2024, John Herron via cctalk wrote:
Yup, that's all I used to do. Some scotch tape over the floppy disk hole to
make the system see it as DD. If it didn't automatically format as 720, you
could specify size or sector count with format.com in dos.
Somemedia sensors are optical;
A 720K 3.5" is about 600 Oersted;
a 1.4M 3.5" is about 720-750 Oersted.
You can format a 1.4M as 720K, and often, maybe even usually, get away
with it; it will be just like a poor quality 720K.
On drives with a media sensor, you can cover the hole during formatting.
On Tue, 30 Apr 2024,
On Sat, 27 Apr 2024, Fred Cisin via cctalk wrote:
I had checked it on an NEC V20, but not on MANY other CPUs.
at least, I think that it was a V20.
The code that I had written to try to identify which processor was running
thought that it was.
--
Grumpy Ol' Fred ci
How many know that AAM is a two byte instruction, with the second byte
being 0Ah?
Changing the second byte to 8 gave division by 8, etc.
On Sat, 27 Apr 2024, Chuck Guzis via cctalk wrote:
Only for sure on Intel x86 processors. I believe that the NEC V20
assumes that the second byte is 0x0a
Did any one need REAL BCD math like the Big Boys had?
On Sat, 27 Apr 2024, Jon Elson via cctalk wrote:
No, this is a fallacy. Binary arithmetic is as "accurate" as decimal.
Handling VERY large numbers in floating point loses some precision, but any
computer can do multiple word binary quite
On Sat, 27 Apr 2024, Gary Grebus via cctalk wrote:
By the time frame mentioned in the article (1981) there were many
commercially available applications. There was also hardware (e.g. from DEC,
DG, HP) that was of a scale where it would be dedicated to one application.
At that time I worked
On Fri, 26 Apr 2024, Sellam Abraham via cctalk wrote:
It really is a momentous event, and should be properly honored and
celebrated. Wow, half a century.
Thanks for bringing this up.
Is this half a century from when they said, "Hey, you know what would be
neat to build?"
or from when they
On Wed, 24 Apr 2024, ben via cctalk wrote:
This would be great, but I live on the other side of the pond
and BBC anything is hard to find, let alone Micro's.
Where is my "Dr. Who".
Ben.
I was able, quite easily, to order DVDs from Amazon.co.uk.
That got me "Shada" (Doctor who written by
Did the Dimension 68000 (a multi-processor machine) have Z80 and 6502?
On Tue, 23 Apr 2024, Chuck Guzis via cctalk wrote:
Couldn't Bill Godbout's CPU-68K board co-exist with other CPU boards?
Did he, or anybody else, make an S100 6502 CPU board?
On Tue, 23 Apr 2024, Van Snyder via cctalk wrote:
I had a "Magic Sac" thing-y that plugged into the ROM port of my Atari
1040. When I put a Mac ROM into its socket, I could run most Mac
programs that I had.
That was pretty cool
The developer of it said that when he met with Apple's lawyers,
Did the Dimension 68000 (a multi-processor machine) have Z80 and 6502?
On Tue, 23 Apr 2024, Bill Gunshannon via cctalk wrote:
What about the Tandy 16 and 6000. M68K and Z80.
Yes.
But the original comment that I was responding to was asking Z80 and 6502.
Cromemco also had a 68000 and Z80
/2024 7:00 PM, Fred Cisin via cctalk wrote:
On Tue, 23 Apr 2024, Van Snyder via cctalk wrote:
I shared an office with a lady who got a computer from Ohio Scientific
that had both a Z80 and a 6502. It also had two 5/25" floppy drives.
She also got a tee-shirt that said "I have two floppie
On Tue, 23 Apr 2024, Van Snyder via cctalk wrote:
I shared an office with a lady who got a computer from Ohio Scientific
that had both a Z80 and a 6502. It also had two 5/25" floppy drives.
She also got a tee-shirt that said "I have two floppies." Except she
didn't.
aside from her floppies, .
Again, not impossible, but very likely not feasable.
On Mon, 22 Apr 2024, Mike Katz wrote:
Well not possible with the hardware available at the time.
Some stuff is getting faster, . . .
Can you estimate how much faster it would need to be?
(perhaps then, log(2) of that, times 18 months?
On Mon, 22 Apr 2024, Mike Katz via cctalk wrote:
Cycle accurate emulation becomes impossible in the following circumstances:
* Branch prediction and pipelining can cause out of order execution
and the execution path become data dependent.
* Cache memory. It can be very difficult to predict a
On 2024-04-22 1:02 p.m., Chuck Guzis via cctalk wrote:
I'd like to see a Z80 implemented with UV-201 vacuum tubes... :) --Chuck
On Mon, 22 Apr 2024, ben via cctalk wrote:
Real computers use glow tubes like the NE-2 or the NE-77.:)
I thought that real computers use gears
Gee! Have sales gone down?
One more reason to use the 8080 subset when writing CP/M programs.
Aren't there already some licensed second sources?
On Tue, 16 Apr 2024, CAREY SCHUG via cctalk wrote:
The wang calculator was hardly tiny, at least not the one I used in 1970-71.
IIRC the size of a large lunchbox or maybe an attache case.
AND...it could connect to four display units, an early timesharing system. I
think you could have
Although the HP-35 was the first "pocket calculator" from HP, it was not
the first handheld calculator.
On Wed, 17 Apr 2024, Adrian Godwin wrote:
I think it was the first *scientific* pocket calculator though.
I believe that that is correct.
and Casio CFX-40/CFX-400 (1984?) was the first
901B is the first pocket calculator I remember - I don't know if there were
earlier ones.
On Tue, 16 Apr 2024, Van Snyder via cctalk wrote:
The first one I remember is the HP Digital Slide Rule, about 1965. Six
digits. $600.
The HP-35 was marketed with a name of "Electronic Slide Rule"
On Mon, 15 Apr 2024, Don R via cctalk wrote:
At first I misread the subject as my 901lb wife….
Man I need my eyes checked! ;o)
Don Resor
Sent from someone's iPhone
Or read it on a larger screen.
It clearly says "90lb", not "901lb"
Bomar may be offended that you think that she gained 811
On Mon, 15 Apr 2024, Tom Gardner via cctalk wrote:
The IBM 350 disk storage (RAMAC) has 5 million 6-bit characters or 3.75 MB; the
actual recorded characters were 8-bits in length including a parity bit and a
stop bit for each recorded 6-bit character
It was announced as part of the IBM 305
On Fri, Apr 12, 2024 at 9:45 AM Christian Kennedy via cctalk
wrote:
While on the topic of odd IBM mass storage systems, does anyone recall
an IBM system that used rotating carousels holding sheets of magnetic
material? The carousel would rotate to position the selected sheet into
the
Did any one ever use a keyboard to magtape as input device?
On Sat, 13 Apr 2024, Paul Koning via cctalk wrote:
My wife did, sort of: for a while she worked with IBM MT/ST word processors.
Those were very early word processing systems that used a custom magnetic tape
cartridge for storage
IIRC, there were two main models of 5150, and a few sub-models.
All 5150 were five slot. (5160 (XT) had 8 slots)
There was the "16-64KB" that had one row of 4116 soldered in, and three
rows of sockets. It could be purchased with those other three rows
populated, at a rather high price for
On Mon, 8 Apr 2024, Bill Gunshannon via cctalk wrote:
I just can't believe none of he developers noticed or maybe that
was the point where they all gave up. :-)
Presumably, it worked on the machine that they were using.
Not everybody tests everything on all possible configurations.
SOME
Does the Turbo Pascal run on those machines with trivial source file?
or subsets of the Kermit code?
On Mon, 8 Apr 2024, Bill Gunshannon via cctalk wrote:
Haven't tried any other programs yet as I really wanted Kermit but
none of the other CP/M Kermits work on these machines (at least not
so
On Mon, 8 Apr 2024, Bill Gunshannon via cctalk wrote:
I'm having bit of fun with my various CP/M systems but I ran into
what I see as an interesting problem. I got Turbo Pascal on two
systems. A TRS-80 model 4P running Montezuma Micro CP/M and a TRS-80
Model II running Pickles & Trout CP/M.
On Thu, 4 Apr 2024, Bill Gunshannon via cctalk wrote:
Well, The SoftCard and the Language Card (why did they call it that?)
both go for $100 a piece. The one is a IIe, not a \\e.
Was that "IIe", "][e", or "//e"?
There are
some on eBay now for more than $2000. I wouldn't expect that but I
do
On Mon, 1 Apr 2024, Just Kant via cctalk wrote:
I have more then I need. All the working ones are HP w/color crts, and as far
as older, verifiably vintage tools (right down to the 680x0 processor in
either) I have to admit I favor them as a brand. Call we an oddball, weird egg,
badges I wear
OTOH, spammer mailing lists, and leaked personal and trade secrets
seem to last forever.
On Thu, 28 Mar 2024, ben via cctalk wrote:
You forgot Mickey Mouse.
Is the mouse's immortality due to his army of intellectual property
lawyers?
On Thu, 28 Mar 2024, Bill Gunshannon via cctalk wrote:
Remember when they said now that we had the web nothing would
ever be lost again? :-(
sho' nuff, the memory, attribution, and written forms of that concept are
lost. "The internet is written in sand."
For example, remember Howard
You say that like fsck is reliable now...
On Sat, 23 Mar 2024, Cameron Kaiser via cctalk wrote:
There's a reason it's only one letter off.
I've always wondered, . . .
"Feature" or "bug"?
Deliberate, or one of possibly many errors in development?
--
Grumpy Ol' Fred
CORRECTION:
GCR was used on Apple2, 400K/800K Mac, Commodore, Sirius/Vector, etc.
That should read Victor 9000, NOT Vector [Graphics]
Vector Graphics was hard sectored, and not GCR.
Northstar is probably the best known of the hard sector formats.
On Tue, 27 Feb 2024, CAREY SCHUG via cctalk wrote:
did not know about gcr/mfm on same floppy...if you respond, please mention who
does that. gaak, I don't even
recognize "gcr" at this point. I remember mfm and something else. mfm was
single density, right? was gcr
double density? does not
On Wed, 31 Jan 2024, Nigel Johnson Ham via cctalk wrote:
I do remember reading that lot of British computers were quite superior
to the rest of the world, but sold for inland use only. The reason given
was that we couldn't figure out ow to make them leak oil!
cheers,
Nigel
Did Lucas make
First time I am hearing of this. Are details up on the vcf site?-Ali
On Thu, 25 Jan 2024, Sellam Abraham via cctalk wrote:
Forgive me, I should not have assumed everyone already knew about it.
February 17-18 at the Hotel Fera Event Center in Orange, California.
https://www.vcfsocal.com/
and we can all stop copy and pastin from wikipedia to act like we know what
we're talking about.
On Wed, 24 Jan 2024, Tony Jones via cctalk wrote:
You keep saying this. Why? It's rather childish. Most of my knowledge
comes from personal interest (I wrote a Smalltalk VM in the late 80's),
and, of course, with anything that people caan get too close to, you will
get "blind men and the elephant" discrepancies between any two accounts of
the event.
--
Grumpy Ol' Fred ci...@xenosoft.com
Well, if you compare a complete Mac, with a complete PC, including
comparable hardware and software, they actually came out close to even!
BUT, if you compare a complete Mac with an absolutley bare 5150PC, and
shop for reasonable prices on RAM, drives, monitor, etc., with shareware
software
On Wed, 24 Jan 2024, Murray McCullough via cctalk wrote:
The Apple Mac, 40 years old, came from Xerox PARC’s GUI and Apple’s LISA.
Not sure that it really changed computing though! Financially it didn't
help Apple until after 1997 and Gate's investment.
Although they still needed help, the Mac
Motorola tended to redesign from scratch, whereas Intel would modify their
previous design.
On Wed, 22 Nov 2023, Paul Koning wrote:
Which might explain why the x86 ISA is such a convoluted tangle.
Although redesign from scratch will tend to produce a better product,
modifying previous
On Wed, 22 Nov 2023, ED SHARPE via cctalk wrote:
Was there ever a COMPUTER using a 4004 that you cud really do something
or did tat finally arrive with the 8008 as in the skelby shelby sp? 8008 i
now there was an Intel INTELIC 4 (?sp) could n that use 4004 or one of
the
me off the mailing list.
Carl Yoder
hummer51...@gmail.com
On 11/21/2023 12:24 PM, Fred Cisin via cctalk wrote:
> ISTR a 4004 on one of the boards of my DTC300 Hytype I daisy wheel
> printers.
>
> (or has unrefreshed wetware dynamic RAM lost its content?)
>
>
> --
>
On Tue, 21 Nov 2023, Brent Hilpert via cctalk wrote:
. . . the same time-frame
(measured in months) of the 4004. IIRC, there's some argument there
about development vs production vs release vs availability dates.
also, "announcement" (cf. vaporware)
Hence, it makes sense to acknowledge a
ISTR a 4004 on one of the boards of my DTC300 Hytype I daisy wheel
printers.
(or has unrefreshed wetware dynamic RAM lost its content?)
On Tue, 21 Nov 2023, Peter Wallace wrote:
I think thats a 4040
Peter Wallace
Sorry about that. Not sure whether to blame that on old-timers memory
ISTR a 4004 on one of the boards of my DTC300 Hytype I daisy wheel printers.
(or has unrefreshed wetware dynamic RAM lost its content?)
--
Grumpy Ol' Fred ci...@xenosoft.com
On Mon, Oct 2, 2023 at 5:18 AM Stefan Skoglund via cctalk
wrote:
The main problem with that lorry hurtling down the freeway is latency.
I need to move 1 PB . how long will it take filling and packing
enough IBM LTO-9 tapes to send 1 PB ?
How long does it takes to fill 1 tape with 18
In the 1990s, I started writing about floppy disks, how FM/MFM worked,
IBM/WD track and sector structure, directory structures, DOS Utilities,
disk repair, etc. But, got bogged down with too much to do, such as
closing my office, etc., . . .
On Sun, 10 Sep 2023, Ali wrote:
Now this would be
If you want to build a ship, don't drum up people to collect wood and
don't assign them tasks and work, but rather teach them to long for the
endless immensity of the sea.
On Sun, 10 Sep 2023, Sellam Abraham via cctalk wrote:
We must teach Fred to long for the endless immensity of the written
On Sun, 10 Sep 2023, Will Cooke via cctalk wrote:
I make an official motion that Fred write his own "Everything I Know
About Floppy Disks" page / book /encyclopedia.
I suspect that what is inside his head is the greatest collection of
knowledge about floppies on the planet.
Fred, you will be
On Sun, 10 Sep 2023, Chuck Guzis via cctalk wrote:
Can't say, but probably. I've got an 8" disk here written by an Apple
II. Encoding is weird--basically the Apple RWTS encoded as 8 bit FM
(3740) bytes. Haven't bothered to see from whence it came.
On 9/10/23 13:31, Fred Cisin via c
On Sun, 10 Sep 2023, Chuck Guzis via cctalk wrote:
Can't say, but probably. I've got an 8" disk here written by an Apple
II. Encoding is weird--basically the Apple RWTS encoded as 8 bit FM
(3740) bytes. Haven't bothered to see from whence it came.
Sorrento Valley Associates sold an FDC for
On Sun, 10 Sep 2023, Chuck Guzis via cctalk wrote:
Can't say, but probably. I've got an 8" disk here written by an Apple
II. Encoding is weird--basically the Apple RWTS encoded as 8 bit FM
(3740) bytes. Haven't bothered to see from whence it came.
Sorrento Valley Associates sold an FDC for
On Sun, 10 Sep 2023, Chuck Guzis via cctalk wrote:
Now, let's talk about 2.8" and 3.25" drives; UK readers are certainly
familiar with 3.0 inch CF drives used on Amstrads.
Amdek? sold a dual 3" drive in USA, marketed as external drives.
There were ads for it in one or more of the Coco
On Sun, 10 Sep 2023, Chuck Guzis via cctalk wrote:
There are 40 track derivatives; used for word processing, particularly
on some Brother models. No big deal; when reading those, one simply
double-steps a "normal" drive. In any case, as far as I recall, they
all used Brother's proprietary GCR
It's odd that he brings up things such as 100tpi drives (VS 96tpi)
and 3" (but not 3.25" on which Dysan bet the company), the very early 40
track 3.5",
On Sun, 10 Sep 2023, Joshua Rice via cctalk wrote:
What confused me, is that i believe the 3.5" Sony Microfloppy originally had
70 tracks.
On Fri, 8 Sep 2023, Bill Degnan via cctalk wrote:
I have had better luck with a P-III motherboard that connects to the 34-50
pin adapter in the middle and 8" on the other end. This way you can trick
the BIOS of the computer to think the 8" drive is a 1.2Mb 5 1/4". With
this set up I have made
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