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• Demo Night
• IIgs Disk Creation

We have a Apple IIgs, which can be neat to run demos on. Using hardware that is actually old makes the demo night more fun, and it's neat just for elementary school nostalgia.

This does not describe how to transfer disk images using a serial null modem cable. That will soon be another viable option, once I find software for doing ZModem on the IIgs.

3.5" Disks

The unfortunate thing is that Apple uses a special encoding for double density 3.5" disks. This gives 800k of disk space rather than 720k, but no PC floppy drives can write disks for the machine.

Prerequisites

1. kegs (or some other IIgs emulator)
   • Asimov Disk Imager
2. A Macintosh with a floppy drive
   • Disk Copy (6.3.3 works, other versions may also)

Outline

1. launch Asimov Disk Imager in kegs
2. save image in Disk Copy 4.2 format

3. transfer images to Mac (i.e. AppleTalk)

4. due to resource mumble, can only use Disk Copy to mount image, but can't make floppy
5. use Disk Copy to create an image from the mounted image
6. save the newly created image somewhere, as this makes disk creation much simpler in the future
7. use the newly created image to make a floppy

5.25" Disks

These are a bit easier, mostly because the disk images are only 140k.

Prerequisites

1. A IIgs with a 5.25" Apple floppy drive
   • Asimov Disk Imager
2. A Macintosh with a floppy drive
   • Need support for formatting 800k ProDOS floppies

Outline

1. transfer disk images to Mac (i.e. AppleTalk, or an MSDOS formatted 3.5" floppy)

2. format a 3.5" floppy in the ProDOS format (if using an HD disk, cover the HD hole with tape)
3. copy the disk images to that floppy (as many as 5 will fit)
4. set up a RAM disk on the Apple IIgs (big enough to hold the disk images)
5. copy the disk images from the floppy to the RAM disk
6. use Asimov Disk Imager to make floppies from the images