1772 floppy controller hack...

Chris M chrism3667 at yahoo.com
Thu Jan 10 18:51:47 CST 2008

which *Ampro* are you talking about, and how did you
manage the overclocking? If asked, I would have
suggested, from memory, that the LittleBoard/PC
already supported high density floppy drives, but I
could be mistaken.

--- Gene Buckle <geneb at deltasoft.com> wrote:

> In my quest to use 1.44MB 3.5" floppy drives on my
> Ampro, I've found that 
> the 1772-02-02 variant of the floppy controller chip
> can be "overclocked" 
> to 16Mhz in order to correctly read/write 3.5" high
> density disks.
> Beyond needing to adjust the step rate to 6ms to
> compensate for the 
> doubled clock rate, is there anything else I should
> be aware of?  I've 
> seen many mentions of this particular hack on the
> Atar ST line of 
> computers to achieve the same goal, but I wasn't
> sure if there was some 
> other factor I had to be aware of.
> Thanks all!
> g.
> -- 
> Proud owner of F-15C 80-0007
> http://www.f15sim.com - The only one of its kind.

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