1.2M HD / 300kbps / single-density

[Chuck Guzis]

Dave, that's very strange.  I just went and tried it on one of my 
"regular" systems, a box with an Intel TC430HX mobo in it.  The 
controller on this board is a National PC87306B (serial/parallel, 
clock, floppy, IrDA and keyboard) that does just fine with FM.  I 
repeated on another "regular" box with an Intel PD440FX board (uses 
the NS PD87307) with the same results.

In both cases, the drive was a Teac FD55GFR running at 360 RPM.

'Matter of fact, I have to be very careful with the first machine--
it's got a Toshiba 1.44M 3.5" on it that will automatically change 
spindle speed if a 1.3MB 3.5" diskette is inserted without giving any 
external indication.

In both machines, I coiuld format, write and read 48 and 96 tpi SD 
formats in the 55GFR.

(Those intel 400-series mobos are great because they use the NS Super 
I/O chip--it's 8473-compatible, which means it'll also handle writing 
128-byte MFM sectors, unlike its NEC-based relatives.)

I wonder what's up with your setup?

Cheers,
Chuck