Dec 102017
Device driver for 720K floppies.
File 720KDVR.ZIP from The Programmer’s Corner in
Category Utilities for DOS and Windows Machines
Device driver for 720K floppies.
File Name File Size Zip Size Zip Type
DVR35.COM 2427 995 deflated
FORMAT35.COM 4492 1570 deflated
README.DOC 2413 1123 deflated

Download File 720KDVR.ZIP Here

Contents of the README.DOC file

Installing the device driver for 720K drive in XT or AT:

Using a suitable editor make the following entry into your
CONFIG.SYS file on the root directory of your hard drive.
If you do not have a CONFIG.SYS file create one.


Replace "/d" with the drive parameter you chose from the
chart below depending on how the 720K drive was installed:

Firt floppy drive ... /0
Second floppy drive ... /1
Third floppy drive ... /2
Fourth floopy drive ... /3

Boot your system. The following message will appear during
the boot process.

DVR35 v1.xx External Disk Driver
Copyright 1986 J&M Systems, Ltd.
Driver loaded successfully for drive x:.

Formatting 720K diskettes:

FORMAT35.COM command syntax

[d:][path]FORMAT35 d:[/B][/V][/I=interleave factor]
Parameters: [d:][path] preceding FORMAT35 to indicate
drive and path; default is the current drive
and directory. Optional.

[/B] reserves sectors for system files to
be later installed by using the SYS command
in DOS. Optional.

[/V] will prompt user to enter a volume
label. Optional.

[/I=interleave factor {1..8}] resets the
interleave factor the disk is initialized to
when formatted. Valid factors 1 through 8.
Default is 1, which is the fastest in speed
of formatting. Optional.


If you are installing MACH 3.5 on a PC AT or compatible, be sure you
run your setup program and configure drive B: as a DOUBLE SIDED drive.


Note that if you are using version 2.x of DOS that the drive
letter designator used by the 3.5" drive will be 1 greater than
your last drive. For example, you have two 5.25" floppies
and one 3.5" floppy in addition to a single hard drive. The
following would be your configuration:

A: first 5.25" floppy360K
B: second 5.25" floppy360K
C: 3.5" floppy, 360K format
D: hard drive
E: 3.5" floppy, 720K format

Drives C: and E: are the same drive! Two LOGICAL devices are
implemented on the same PHYSICAL device. Use drive E: for
general use and drive C: when a mirror image copy of a 5.25"
disk is required.

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