🚀 go-pugleaf

I recently posted to comp.sys.zenith asking for help with external 
floppy drives on a DTC hard/floppy controller in a Zenith 248.  Thanks
to the several people who sent me email for suggestions.    Most people
suggested a secondary controller or a bridge board be added to the
system for the external drives.    

I just found from another source that the Zenith/DTC controllers with
the DB-37 connector are capable of running external drives, but it
requires another driver, XFBIO.SYS.   Apparently if you purchase the 
controller from DTC, you get the driver with it.    If you get it from
Zenith the driver isn't supplied.   You still load the DRIVER.SYS as
in the DOS manual after XFBIO.SYS.    I obtained the driver and installed
it and it all works fine now.    If you try this, the external floppies use
drive select 3 and 4, as opposed to reusing 1 and 2 like on the old PC/XT
external drive connectors.    The same person also mentioned that if you
have the DTC controller that doesn't have the external DB-37, but does
have the appropriate place on the board, you can add the connector and
everything else is on the board to make it work.

--
Dave Chasey - Hardware Systems Engineer
Purdue University Engineering Computer Network
West Lafayette, IN 47905  (317) 494-6425
Internet: wn9nbt@ecn.purdue.edu         UUCP: ...!pur-ee!wn9nbt

--
Dave Chasey - Hardware Systems Engineer
Purdue University Engineering Computer Network
West Lafayette, IN 47905  (317) 494-6425
Internet: wn9nbt@ecn.purdue.edu         UUCP: ...!pur-ee!wn9nbt