17 Jan
2005
17 Jan
'05
10:57 a.m.
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.