What Is The IIGS Disk Images

The What Is The Apple IIGS people have come through again.

They appear to have recently gotten onto a CompactFlash kick, by way of the CFFA card. And they've published 10 .hdv hard drive partitions on this page. I've been installing a game or two at a time onto my (Microdrive Turbo) CF card as time permits, but they were way ahead of me. Someone out there actually made sense of all the HD installers and patches.

After playing with the .hdv images in KEGS-OSX and seeing that they were in fact awesome, I ran to Walgreens and paid way too much for a new 256M CF card. Here's the procedure I followed, using a Mac with USB CF reader (which came up as /dev/disk1):

1. Insert old (256M, 8-partition) IIGS CF card, and

dd if=/dev/disk1 of=cfimage bs=512 count=256

This gave me a backup image of my original CF card. The first 256 blocks hold the Microdrive configuration and the partition map, and I need to carry that information over to the new card.

2. Insert new IIGS CF card, and use Disk Utility to re-partition it as 1 partition of 'free space', to keep it from automounting, which kept me from being able to use /dev/disk1. Then,

dd if=cfimage of=/dev/disk1 bs=512

3. Select .hdv partitions to use and install them:

cat WhatIs/System\ 6\ +\ Free\ Games.hdv  WhatIs/Action\ Games.hdv  WhatIs/Adventure\ and\ Sim\ Games.hdv  WhatIs/Sports\ and\ Unreleased\ Games.hdv WhatIs/Social\ History\ and\ Computers.hdv  WhatIs/Reading\ Writing\ and\ Maths.hdv WhatIs/Board\ Games\ and\ RPGs.hdv WhatIs/Productivity\ and\ Graphics.hdv > cfimage

dd if=cfimage of=/dev/disk1 bs=512 seek=256

Bingo, just like that, it worked. But understand that because of that 256-block header, the last partition is going to be 128Kbytes short, so some files or directories might not exactly work properly (I think just Emerald Visions 2 in this case).


Between this, and a Golden Orchard CDROM in the AppleCD drive, a stunning percentage of All Things IIGS is available for the clicking. Forgive me as I waste another beautiful Key West Sunday playing games on the Apple IIGS.