4 floppy disk drives on a PC?

From: Eric Smith <eric_at_brouhaha.com>
Date: Mon Jan 17 18:57:28 2005

Sellam wrote:
> I'd like to make a box with four floppy types: 5.25" 360 and 1.2, and
> 3.5" 720 and 1.44. I seem to recall someone here did this.

You don't really need a 3.5" 720K drive. Unlike the 360K/1.2M situation
with 5.25-inch drives, the 1440K 3.5" drives can reliably read and write
720K diskettes.

> I'll check the DOS manual to see if it says anything as Nico indicates.

IIRC, there was a driver supplied in some (but not all) versions of DOS
called DRIVER.SYS which had to be installed using a "DEVICE=" command
in CONFIG.SYS in order to support extra floppies. I don't recall whether
it allowed specifying a base IO address for a secondary controller.
They may have removed some functionality in later DOS releases.
Received on Mon Jan 17 2005 - 18:57:28 GMT