Apple II 800K Diskettes?

From: Fred Cisin <>
Date: Mon Sep 24 20:31:13 2001

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

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
Received on Mon Sep 24 2001 - 20:31:13 BST

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