Re: AEHD drive

[supertimer@aol.com (Supertimer)]

Pim Blokland <nipp@nipp.nl> wrote:

>supertimer@aol.com (Supertimer) wrote:
>
>> GCR is 800k and 1.6MB.  MFM
>> is 720k and 1.44MB.  When Apple later capitulated to the PC
>> world and switched to MFM, they had to make a new controller
>> for Macs, the SWIM.  They provided the capability for Apple II
>> users via the SuperDrive (SWIM based) card.
>
>*** warning: stupid question alert ***
>
>So I've got this Mac here, see? And it has a SuperDrive, right? It can 
>access MFM disks (720K and 1440K) - it can even create ProDOS 720K 
>disks, given the right software. And it can access GCR disks, OK? 
>And it handles HD disks, OK?
>
>Why then can this Mac not read 1600K floppies, so that I could use 
>&@#$#^& HD disks for exchange with my GS?!?

That's a good question.  Most likely, the floppy driver built into
MacOS is set to automatically assume a 1.44MB MFM format
when it detects a high density disk.

If you know how to program the Mac, you might want to try
writing your own driver.