speaking of 3.5" floppies, is 720K R.I.P.?

[Chuck Guzis]

On 1 Feb 2009 at 10:11, Chris Elmquist wrote:

> What's particularly nasty is that I chose these drives, Samsung SFD-321B,
> because I had a recent datasheet that clearly showed they supported
> this mode--  until of course they arrived and the switch/sensor is not
> even installed!

Chris, the OEM manual for the SFD-321B is online at:

www.techtravels.org/amiga/SAMSUNG-SFD321B-070103.pdf 

I note that they do use pin 2 as a density select pin and the OPA and 
OPB PCB jumpers to determine the operating mode.  You might want to 
play with this a bit to see if you can coax it into operating in 2D 
mode.

Whatever, please report back because I note that these drives are (1) 
cheap and (2) have a provision to supply a READY signal instead of 
DISK CHANGE.  That could come in useful.

Cheers,
Chuck