On 11/28/2005 at 10:46 AM Dwight K. Elvey wrote:
 Besides the HeathKit hard sectored controller
board,
used on both the H8 and the H89, Polymorphics also
used a serial chip to do data. In both of these
cases, as you state, they used synchronous serial
chips and not async. 
 To put a reverse twist on this, has anyone ever used two floppy controllers
 to transfer data between two systems?  I know it'd take a little extra
 hardware (something has to provide address headers outside of a format
 operation), but it should still be quite possible to do so.
  
Yes, I have. only because the system didnt' have a serial port, only a
centronics printer port (non PC style).
Depends on the floppy controller on the headers.
the 765 makes a good tape controller.
Allison