From: et472@FreeNet.Carleton.CA   
      
   Dave Griffith (dgriffi@cs.csbuak.edu) writes:   
   > Richard VanHouten  wrote:   
   >> I seem to recall that the original Mac floppy drives were 3.5" 180k   
   >> drives.  If these are those, they won't be compatible with anything else.   
   >   
   > No.  The original Mac floppies were 400k   
   >   
   Yes.   
      
   Single sided 3.5" would have been 400k (for the Macintosh) or 360K for   
   the "IBM PC types".   
      
   Single density and single sided 3.5" drives would have given about 180K.   
      
   The portable drive for the Radio Shack Model 100 laptop had something   
   low like that, most definitely single sided and since it was such a low   
   value it must have been single density.   
      
   Of course, by the time the 3.5" drives were introduced, it seems hard   
   to believe anyone was interested in single density.   
      
   Also, there were a number of also-rans in the smaller floppy disk   
   war.  There were 3" drives (the poor people who bought into those   
   expecting it to be the future) and there were 3.5" drives that   
   used an actual floppy disk, ie they were 3.5" but looked like 5.25"   
   floppies except for the metal hub.  I seem to recall there were   
   some others.  I once bought some 3.5" drives, circa 1994, and I could   
   never figure out what they were for.  They had an odd connector, and   
   I was never able to track down what they were supposed to be.   
      
     Michael   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)