Re: Embedded systems!
An ordinary 3.5" 720K DS drive works fine on a PCW, and the 3" PCW drive on a PC (though you need utillity SW for the CP/M FS), it's a dumb adaptor cable is all that is needed. Also 37 way 8" floppies work on 3" or 3.5" drive cable with a dumb cable adaptor.
There was a HDD for the PCW, but that didn't use the floppy cable.