Fairlight-CMI

--- In Fairlight-CMI@yahoogroups.com, Alexander Guelfenburg
<vmebay@...> wrote:
> 
> stupid question: If the PC can read 8" disks with 
> a modified adapter, it should be possible to 
> install a 3,5" PC drive to a CMI with a modified adapter, shouldn´t
it?!?

This does work with the Series III, I built an adapter for mine a
while back (and I sent one to KMI a few years ago).

Note that there are at least 3 versions of the ROM for the QFC9 floppy
controller: DQFC910, DFC911, and DFC912.  If anyone has any other
versions, I'd be very interested in getting a copy.

Fairlight appears to have sold a 3.5" drive retrofit for the Series
III, and the DFC912 seems to be the ROM that went with that.  The
driver in the ROM seems to be the same as the DFC911, with some
formatting parameters changed (I believe this is to get the full
1.44MB from the 3.5" drive, vs. the 1.2MB you get with an 8" drive).

I wasn't able to get the adapter to work with the IIx, however.  I
think it's because of a dependency on the DISK CHANGED signal, which
the 3.5" drives don't (usually) provide.  Some 3.5" drives apparently
have jumpers or can be modified to provide DISK CHANGED, but I haven't
experimented with that.

Joe