On Sun, Jul 25, 2021 at 11:46:17AM -0600, Grant Taylor via cctalk wrote:
> On 7/24/21 10:26 PM, Chuck Guzis via cctalk wrote:
>> My recollection of the DMF Microsoft period was that if you purchased a
>> retail MS product using the DMF format and couldn't get it read on your
>> system, a call to
On Sat, 24 Jul 2021 at 01:29, Grant Taylor via cctalk
wrote:
>
> On 7/23/21 11:23 AM, Liam Proven via cctalk wrote:
> > Win95: 13 disks.
>
> That's fewer than I remember.
>
> Though, Windows 3.1 was 6 disks and Windows for Workgroups 3.11 was 8
> disks. That was on top of MS-DOS 6.22 which was 3
On Mon, 26 Jul 2021, Peter Corlett wrote:
When writing, PC-style disk controllers scan for the appropriate sector
header then switch to write mode to overwrite the old sector data. This
requires guard bands between sectors and sector headers. The PC's
This is not called a guard band. A guard
On Sat, 24 Jul 2021 at 19:52, Kevin Anderson via cctalk
wrote:
>
> Here is an inventory of what I have for parts that I am desiring to pass on
> to others if they are interested or to seek permission to pitch to an
> electronics recycler (or rubbish bin) if these things are of limited value
>
The bottom line on floppy disks, in my view, is that they're a design
compromise out of late 1960s technology.
The platform (drive) is made to be inexpensive (for the time), as is the
media--all limited by, at best, early 1970s technology. Back then,
almost all drive spindles were belt-driven
On Mon, 26 Jul 2021, Peter Corlett via cctalk wrote:
HD disks can hold "up to" 2MB (12,500 bytes per track, times two sides, times 80
tracks), as printed on some of the more misleadingly-labelled brands. However,
splitting that into sectors and adding guard bands reduces the usable space.
On 7/26/21 9:44 AM, Fred Cisin via cctalk wrote:
> On Mon, 26 Jul 2021, Peter Corlett via cctalk wrote:
> "inter sector gaps", "write splice", etc. not "guard bands" any "bands"
> (synonym for circle) would be between tracks.
>
> But, VERY good important point that you bring up.
> If a disk
On Sat, 24 Jul 2021 at 18:41, Grant Taylor via cctalk
wrote:
>
> Talk about a chicken and egg / priming problem. How do you get the
> CD-ROM drivers off of the CD-ROM that you need a driver to access. ;-)
> The quintessential answer is to have (access to) another system (or
> driver) assist.
Hi,
A plea, does anyone have a copy of OpenVMS Alpha V7.3-2? I have looked at all
my archives and only have it for VAX. An upgrade would also work as I have V7.3.
If someone has a copy in VMS so-called ISO format that would be great.
Just got a Personal Workstation 500au fully working and
On Fri, 21 May 2021, Maciej W. Rozycki wrote:
> ISTR upstreaming some fixes to Linux UFS support 20+ years ago to address
> this very problem (IIRC OSF/1 or Digital Unix CD-ROMs were also UFS, and I
> had a need to access them under Linux for some reason) and with them in
> place I thought
On Mon, Jul 26, 2021 at 6:02 AM Peter Corlett via cctalk
wrote:
> The Amiga could get 880kiB on a DD disk, and 1760kiB on a HD disk if you have
> one of those hen's teeth drives which spin at 150RPM. It does this by doing a
> read-modify-reformat of the entire track of 11 or 22 sectors, which
I would have borrowed a 2nd floppy drive from another system, done the
copy, and returned the floppy drive. It would probably have been faster.
On Mon, 26 Jul 2021, Liam Proven via cctalk wrote:
You know, that's an excellent idea and I wish I'd thought of it then.
My desktop was an IBM PC-AT
On 7/26/21 10:33 AM, Fred Cisin via cctalk wrote:
> I had several A-B-C-D DC37 switch boxes. One for the multiple
> controller boards (Cordata, EiconScript, JRAM+?) for my Cordata (CX
> engine) laser printer; and a few for machines where I had multiple
> external floppy drives.
On more recent
I wanted to take a moment to say thank you to everyone who has
contributed to the recent threads related to floppy disk capacity.
I have found the threads to be very insightful and have saved things off
for re-reading when I update my personal notes on the subject.
Thank you!
--
Grant. .
On 7/26/21 5:36 AM, Liam Proven via cctalk wrote:
I got it down to 14MB and it would, just barely, boot from the 16MB
SSD, although you could barely do anything as there was almost no
free disk space. It was a vain effort in the end -- being so minimal,
it booted in a few seconds from any
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