Re: Apple II 3.5" Controller and SuperDrive problems...

[spec@vax2.concordia.ca (Mitchell Spector)]

In article supertimer@aol.com (Supertimer) writes...

>Correct.  When the IIc Plus came along, it was fast enough to use
>the GS & Macintosh style 3.5" drives.  

    Increased speed was only part of the reason--it also had some
extra circuitry added to the motherboard to help deal with data
flow from an Apple 3.5 drive. There is the equivalent of a ZipChip
built-in to the IIc Plus, and it takes more than just adding one
of those to make the machine get along with "dumb" floppies drive.

>Ironically, I am not so sure the IIc Plus could use a UniDisk 3.5 
>because of this.

    The IIc Plus handles the UniDisk 3.5 just fine, as well as the
Apple 3.5 and Apple SuperDrive (the latter will work only in 800K
mode though, you cannot use it with high density disks or make use
of its MFM capabilities).

Mitchell Spector
spec@vax2.concordia.ca