I was thinking about the poor guy in Finland that was going to have to
rewire his PDP-7 backplane tonight, and did some digging for bit/sleeve
part numbers. Amazingly, you can still buy the right stuff from Cooper
Tools. They have a really neat pdf catalog
http://www.cooperhandtools.com/catalog/pdffiles/electcat_00/Brands/WireWrap…
>From a 1967 DEC Logic Handbook, you need a gardner-denver 26263 bit and 18840
sleeve for #24 wire and 504221 bit and 500350 sleeve for #30 wire. The #24
unwrapping tool is 500130
These may also work for 1401 connectors, which are quite similar to the H800
DEC single sided module blocks with rectangular shaped pins.
Are hard sectored 8" floppies of any use to anyone? I've got several boxes of still shrink-wrapped SSSD hard sector disks. I've sold a couple boxes on epay, but action on them was lower than I'd imagined. Some folks who resell alot of 8" floppies told me "good luck" because hard sectored just don't sell.
I've seen new soft sectored disks advertised online for fairly hefty prices (don't know if they are selling at that price or not). What systems made use of these? Any that I might own or want to own some day that it'd be worth me holding on to these if I can't sell them for a price worth it to drive to the post office and ship them?
Huw Davies <huw.davies(a)kerberos.davies.net.au> wrote:
> to avoid waste water from the computer room contaminating the
> mouse rooms below.
What's a mouse room?
MS
On Jun 3, 13:08, Fred Cisin wrote:
> > > I'm almost sure I've seen a 16 hard sectored 8 inch disk
someplace.
>
> On Wed, 2 Jun 2004, Don Maslin wrote:
> > I suppose that is possible, Dwight, but it may be a surprise to 3M!
>
> Although I do not have any examples handy, it would not surprise
> me at all to find out that there exist SOME media that weren't
> available from 3M!
The original IBM hard-sectored 8" floppies had 8 sectors, and I don't
think 3M ever made those :-)
--
Pete Peter Turnbull
Network Manager
University of York
Something I've wanted for quite a while is a Sony SMC-2000 computer with
the LDP-2000 laserdisc player. Today I finally got it! This unit had
been used by a local school and they needed to get rid of it. It came
with some laserdiscs and ... four service manuals for both the computer
and laserdisc player! Apparently this runs MS-DOS 2.11 and I don't think
that came with it. But unless that is a special OEM version of MS-DOS,
it won't be a problem. Also included were 8 laserdiscs including three
volumes of Dream Machine and two volumes of Space Archive discs.
They also had several shrinkwrapped packages of IBM DOS 3.30, and I put
one of them on VCM. Also listed on VCM was a copy of the IBM Guide to
Operations for the Personal Computer XT, and Volume 1 of the Hardware
Maintenance and Service for the Personal Computer XT (these are
duplicates of what I already have.) BTW, the money received for these
will go back to the school computer lab.
They had quite a bit of stuff that will either be sold or sent to that
great storage location in the sky. It looked like there were quite a few
ISA sound cards, network hubs (10 Mb/sec), etc.
I've never seen any Wabash or Elephant 8" disks.
Joe
At 05:52 PM 6/3/04 -0400, you wrote:
>you forgot Wabash and Elephant disks... at least I have those laying
around the house...
>
>best regards, Steve Thatcher
>
>
>-----Original Message-----
>From: "Joe R." <rigdonj(a)cfl.rr.com>
>Sent: Jun 3, 2004 5:09 PM
>To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
>Subject: Re: 8" hard sectored floppies
>
>At 01:08 PM 6/3/04 -0700, Grumpy Ol' Fred wrote:
>>> > I'm almost sure I've seen a 16 hard sectored 8 inch disk someplace.
>>
>>On Wed, 2 Jun 2004, Don Maslin wrote:
>>> I suppose that is possible, Dwight, but it may be a surprise to 3M!
>>
>>Although I do not have any examples handy, it would not surprise
>>me at all to find out that there exist SOME media that weren't
>>available from 3M!
>
> Let's see; IBM, Tektronix, Verbatim, Memorex, Digital, Maxell, Intel,
>Centech, Radio Shack, Data Systems. That's just some that I have laying
>around the house.
>
> Joe
>
>
>
>From: "Don Maslin" <donm(a)cts.com>
>
>
>On Wed, 2 Jun 2004, Frank Smith wrote:
>
>> --On Wednesday, June 02, 2004 13:22:39 -0400 Damien Cymbal
<d_cymbal(a)hotmail.com> wrote:
>>
>> > Are hard sectored 8" floppies of any use to anyone? I've got several boxes
of still shrink-wrapped SSSD hard sector disks. I've sold a couple boxes on
epay, but action on them was lower than I'd imagined. Some folks who resell
alot of 8" floppies
>> > told me "good luck" because hard sectored just don't sell.
>> >
>> > I've seen new soft sectored disks advertised online for fairly hefty prices
(don't know if they are selling at that price or not). What systems made use of
these? Any that I might own or want to own some day that it'd be worth me
holding on to these
>> > if I can't sell them for a price worth it to drive to the post office and
ship them?
>>
>> I'd be willing to buy a box or two of them to use in my Altair floppy drives
if
>> they are 32 sector floppies.
>>
>> Frank
>
>To the best of my knowledge, all 8" hard sectored disk are 32
>sector. The only difference is between the 'normal' hard sector
>arrangement where the sector holes encircle the hub hole, whereas
>the 'Vydec' compatible disks have the sector holes around the
>periphery. They are not common, however.
>
> - don
>
Hi Don
I'm almost sure I've seen a 16 hard sectored 8 inch disk someplace.
Dwight
I found my Millenium MicroSystem Analyzer manual while searching for the
manual for the Brikon 723 FD tester. I thought I'd scan it but it's bound
into a paper back book. What's the best way to cut it apart so that I can
scan it? My scanner has a feeder and it's th only way to scan something.
--
If the glue has dried out, just break the binding and peel the pages apart.
clean the hardened glue off the edge before feeding through the scanner.
Alternatively, go to a print shop and have them cut the binding with a
paper shear, making sure the spine of the book is flat.
As it seems my mail server has been having some problems,
I`m very sorry that my replys have been delayed so many days.
for some unknown reason my replyes had been frozen in exim.
with delayed regards
Jacob Dahl Pind
--
CBM, Amiga,Vintage hardware collector
Email: rachael(a)rachael.dyndns.org
url: http://rachael.dyndns.org
>From: "Pete Turnbull" <pete(a)dunnington.u-net.com>
>
>On Jun 3, 10:39, Dwight K. Elvey wrote:
>
>> There is a difference between single and double
>> density that is related to the position of the index hole.
>
>Are you thinking of the different position of the index hole in 8"
>disks? That differentiates single-sided from double-sided, not
>densities.
Yep, that is it.
Dwight
>
>> My
>> understanding is that unlike the 5-1/4 disks, the 8 in. media
>> is the same for the single and double density, just higher
>> quality. In fact, I punch a new index window in some of my
>> double density 8 inch floppies and I've been using them, with
>> no troubles, as single density.
>> The 5-1/4 disk are a different story. Single/Double don't mix.
>
>Sure they do. Same coercivity. There might be a difference in quality
>on early ones, but barring flaws in the emulsion coating, they're
>interchangeable, and you can always use DD as SD.
>
>It's single/double density and high density that are different.
>
>--
>Pete Peter Turnbull
> Network Manager
> University of York
>
