Tandy 1000 MS-DOS Reference Manual page 357

Appendix C / Installable Device Drivers
IC
specifies that changeline (doorlock) support is required. This
is a hardware feature that lets the software know if the drive
! '
door is open.
IF:n specifies the form factor index, where n can be:
o
=
320/360K floppy
1
=
1.2M floppy
2
=
720K floppy (3lfz-inch drive)
3
=
8-inch single-density floppy
4
=
8-inch double-density floppy
5
=
hard disk
6
=
tape drive
7
=
other
If you omit IF, DRIVER.SYS uses a default of 2 (720K).
IH:n
specifies the maximum head number.
n
is a value in the
range 1 to 99.
IN tells MS-DOS that the device is non-removable.
IS:n
specifies the number of sectors per track.
n
is a value in the
range 1 to 99.
IT:n
specifies the number of tracks per side.
n
is a value in the
range 1 to 999.
KEYCNVRT.SYS
(For Key Conversion)
KEYCNVRT.8YS lets you generate keyboard characters other
than Tandy scan codes. This driver is for application software
compatibility.
Include the following DEVICE command in your CONFIG.SYS
file to install the KEYCNVRT.SYS driver:
DEVICE
=
KEYCNVRT.SYS
333