24 Sep
2001
24 Sep
'01
3:25 p.m.
I just acquired an Apple IIgs (thanks Rich!) and am anxious to try it out. I
have downloaded the system software from the Apple site but an unsure how to
go about making 800K disks for use on the IIgs as none of my local computer
stores stock 800K floppies. Is it possible to cover over the hole that tells
the drive that it is a HD disk and format it as an 800K disk? Will the 800K
drive on the IIgs be able to read it? Or do I have to find a source for real
800K media?
24 Sep
24 Sep
3:39 p.m.
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5:46 p.m.
On Monday, September 24, 2001, at 08:39 PM, Tony Duell wrote:
I don't know what machine you're intending to
write the disk images to
disk on, but I am almost certain that a PC floppy controller is
incapable
of writing the Apple 800K format (which uses GCR encoding, not MFM as
PCs
do).
I'm going to write them on a Macintosh which should be able to write
800K disks successfully.
25 Sep
25 Sep
12:13 a.m.
I'm going to write them on a Macintosh which should
be able to write
800K disks successfully.
It will work fine as long as it's an older Mac. Most of your
PPC based Mac's, especially those running OS 8.6 and newer, have
trouble with the 400k and 800k formats.
Jeff
--
Home of the TRS-80 Model 2000 FAQ File
http://www.cchaven.com
http://www.geocities.com/siliconvalley/lakes/6757
2:48 p.m.
I've never had troupble with my 8100, 8500 or 9500 writing 800K floppies,
and they are all running 8.6 or 9.1
At 05:13 AM 9/25/01 -0400, you wrote:
I'm going
to write them on a Macintosh which should be able to write 800K
disks successfully.
It will work fine as long as it's an older Mac. Most of your PPC
based Mac's, especially those running OS 8.6 and newer, have trouble with
the 400k and 800k formats.
Jeff
--
Home of the TRS-80 Model 2000 FAQ File
http://www.cchaven.com
http://www.geocities.com/siliconvalley/lakes/6757
12:28 p.m.
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26 Sep
26 Sep
4:59 a.m.
Yes, I am pretty sure the Mac disk controller can
write the 800K //gs
format (presumably it's similar to the Mac 800K format). I've never
tried
it,though, so I can't be absolutely sure.
It turns out I had one or two 800k disks from the days of my Macintosh
Plus. I tried writing IIgs software on one using my Quadra 650 and was
able to use it on my IIgs. I guess I'll just have to order more DSDD
720k disks rather than trying to mess around with HD disks with their
holes covered.
Thanks to everyone who responded to my question!
David
24 Sep
24 Sep
8:43 p.m.
I just
acquired an Apple IIgs (thanks Rich!) and am anxious to try it out. I
have downloaded the system software from the Apple site but an unsure how to
go about making 800K disks for use on the IIgs as none of my local computer
stores stock 800K floppies. Is it possible to cover over the hole that tells
the drive that it is a HD disk and format it as an 800K disk? Will the 800K
AFAIK the Apple 800K disks are the same physically as PC 720K disks (aka 
25 Sep
25 Sep
1:36 p.m.
Tony Duell skrev:
AFAIK the Apple 800K disks are the same physically as
PC 720K disks (aka
DD (double density) disks). They have a difference coercivity to HD
(1.44M disks) and in general it is not reliable to use HD disks as 720K
(or 800K) ones.
Why do people insist on calling them 720 K disks? There is no such stupid
invention. They're 1 MB disks, not 720 K, not 800 K, not 880 K.
Oh, and there are no 1.44 MB disks either.
I believe that DD disks are still available (they
certainly were in the
UK when I needed some a couple of months back). It's worth getting the
right thing. The physical disk is a lot cheaper than your data :-)
Amiga shops should be able to supply them. But they haven't been easy to find
for the last five years or so. MicroWarehouse still features them in their
catalogue, though at a premium.
I don't know what machine you're intending to
write the disk images to
disk on, but I am almost certain that a PC floppy controller is incapable
of writing the Apple 800K format (which uses GCR encoding, not MFM as PCs
do).
OTOH, Macs with SuperDrives should do it.
--
En ligne avec Thor 2.6a.
When cherry tree blooms, people go and walk there, eat dumpling, bring sake
and talk each other such things as "A superb view!" and "Full of spring
here",
and they become very happily and cheerful. But this is a lie. People gather
below cherry trees and get drunk, vomit, fight, which are happening since the
old days of Edo period. From long time ago.
THE FULL OF CHERRY BOOLMS, CHAPTER 1
24 Sep
24 Sep
3:46 p.m.
----- Original Message -----
From: "David Betz" <dbetz(a)xlisper.mv.com>
To: <classiccmp(a)classiccmp.org>
Sent: Monday, September 24, 2001 8:25 PM
Subject: Apple II 800K Diskettes?
I just acquired an Apple IIgs (thanks Rich!) and am
anxious to try
it out. I
have downloaded the system software from the Apple
site but an
unsure how to
go about making 800K disks for use on the IIgs as none
of my local
computer
stores stock 800K floppies. Is it possible to cover
over the hole
that tells
the drive that it is a HD disk and format it as an
800K disk? Will
the 800K
drive on the IIgs be able to read it? Or do I have to
find a source
for real
800K media?
I have a lead on another IIgs. It should be available as soon as the
owner finished copying the files from it.
I also have a spare IIsi.
Collector of Vintage Computers (www.ncf.ca/~ba600)
4:31 p.m.
On Mon, 24 Sep 2001, David Betz wrote:
I just acquired an Apple IIgs (thanks Rich!) and am
anxious to try it out. I
have downloaded the system software from the Apple site but an unsure how to
go about making 800K disks for use on the IIgs as none of my local computer
stores stock 800K floppies. Is it possible to cover over the hole that tells
the drive that it is a HD disk and format it as an 800K disk? Will the 800K
drive on the IIgs be able to read it? Or do I have to find a source for real
800K media?
800K diskettes (aka 720K) are about 600 Oerstedt. 1.4M diskettes are about
750 Oerstedt. While it's not "right", it is close enough that you will
usually get away with it, most of the time, for unimportant stuff, if
you're lucky. (unlike 360K v 1.2M, which are 300 and 600 Oerstedts
respectively and too different)
IOW, you CAN make a poor quality 800K diskette out of a good 1.4M
diskette.
MOST 720K/800K drives don't even have a media type sensor, and won't
care. But to use a 1.4M diskette as 720K/800K in a modern 1.4M drive,
cover the hole with opague tape.
--
Grumpy Ol' Fred cisin(a)xenosoft.com
6:16 p.m.
I buy 720K 3.5 inch diskette on eBay for about $20 per 100. (You can find a
box of 10 if you don't need a 100.) I search for "floppy 720K". Every week
there is someone selling new-in-box floppies. I also have bought 360K 5.25
disks.
I have no connection with the following eBay auction (Item # 1277913625).
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1277913625
If someone needs a boot disk for their SWTPC 6800 or 6809 computer, I can
provided one.
Michael Holley
----- Original Message -----
From: "David Betz" <dbetz(a)xlisper.mv.com>
To: <classiccmp(a)classiccmp.org>
Sent: Monday, September 24, 2001 5:25 PM
Subject: Apple II 800K Diskettes?
I just acquired an Apple IIgs (thanks Rich!) and am
anxious to try it out.
I
have downloaded the system software from the Apple
site but an unsure how
to
go about making 800K disks for use on the IIgs as none
of my local
computer
stores stock 800K floppies. Is it possible to cover
over the hole that
tells
the drive that it is a HD disk and format it as an
800K disk? Will the
800K
drive on the IIgs be able to read it? Or do I have to
find a source for
real
800K media?
25 Sep
25 Sep
8:32 p.m.
New subject: 3b1 taken..
Thanks to all who posted, the 3b1 has gone away with Richard
Schauer. If I ever find another one, I'll be sure to stick it up here,
too..
Greg Linder
glinder(a)uiuc.edu
24 Sep
24 Sep
8:06 p.m.
On Mon, 24 Sep 2001, David Betz wrote:
I just acquired an Apple IIgs (thanks Rich!) and am
anxious to try it out. I
have downloaded the system software from the Apple site but an unsure how to
go about making 800K disks for use on the IIgs as none of my local computer
stores stock 800K floppies. Is it possible to cover over the hole that tells
the drive that it is a HD disk and format it as an 800K disk? Will the 800K
drive on the IIgs be able to read it? Or do I have to find a source for real
800K media?
David, I believe that I will be able to pick up some once written
720/800k diskettes come next swapmeet on the 6th of September at a
reasonable price if you - or anyone else - are interested. I bought a
batch of 1.44s a while back from the same vendor and they have been
quite satisfactory. They were Compaq diagnostic disks and carried
rather easily removable labels.
Let me know.
- don
25 Sep
25 Sep
4:24 a.m.
"David Betz" <dbetz(a)xlisper.mv.com> wrote:
I just acquired an Apple IIgs (thanks Rich!) and am
anxious to try it out.
I
have downloaded the system software from the Apple
site but an unsure how
to
go about making 800K disks for use on the IIgs as none
of my local
computer
stores stock 800K floppies. Is it possible to cover
over the hole that
tells
the drive that it is a HD disk and format it as an
800K disk? Will the
800K
drive on the IIgs be able to read it? Or do I have to
find a source for
real
800K media?
I just purchased a LOT of 3.5" DD disks from
http://www.supermediastore.com/ -- they sell bulk packs of 500 for $20 each.
(The $20 is listed as a "sale price", but it has been for a few months now.)
Of course you'll have to pay for shipping, and you'll need to pick up
separate labels, but you should be set for a long time, mediawise.
My attempts to cover the hole on HD disks and format them have been less
than successful; none of them passed the "verify" stage of the format cycle.
Of course, those were old, cheap HD disks... but why take the chance when
the correct media is so cheap?
GSL
8340
days inactive
8342
days old
14 comments
12 participants
participants (12)
-
ard＠p850ug1.demon.co.uk -
cisin＠xenosoft.com -
dbetz＠xlisper.mv.com -
donm＠cts.com -
geoffr＠zipcon.net -
glinder＠ews.uiuc.edu -
glindsey＠ssinc.com -
jhellige＠earthlink.net -
KenzieM＠sympatico.ca -
mikeford＠socal.rr.com -
optimus＠canit.se -
swtpc6800＠home.com