1400 HD  (250-3505)     Hard Disk and Floppy Drive      Faxback Doc. # 1059

You use the floppy disk drives to start up MS-DOS and to store programs and
data on diskettes. To insert a diskette into a drive, gently slide it, label
side up, into the drive.

A drive's activity light is on whenever the drive is reading from or writing
to a diskette.

CAUTION: Removing a diskette from a drive when the drive's activity light is
on can destroy the data on diskette.

To remove a diskette from a drive, be sure the drive activity light is off.
Push the diskette eject button until the diskette pops out, and pull out the
diskette.

A hard disk can store much more information than a diskette, and your
computer takes less time to find information on a hard disk. The Tandy
1400 HD has an internal hard disk and a floppy disk drive. The hard disk
drive can store 20 million characters (20M). It is referred to as Drive C.
The 720K floppy disk drive is referred to as Drive A. An optional external
floppy disk drive is referred to as Drive B. The operating system and most
application programs can be operated either from Drive A or Drive C.

The hard disk drive's activity light is on whenever the computer accesses
the hard disk.

CAUTION: Do not turn off the computer when the activity light is on. It can
destroy data on the disk.

When you store programs (such as MS-DOS) and other information on a hard
disk, you should keep backup copies of the programs and data if the hard
disk is accidentally damaged.

┌────────────────────────────────┐
│External Floppy (Weltec Drive): │
└────────────────────────────────┘

External 5 1/4 inch floppy     900-2220  (available Third Party Products)

Note: The Weltec drive uses the floppy drive connector on the back of the
      computer.

When you use an external floppy disk drive, you can change the drive
designations. Use the drive select switch on the right side of your system.
With the drive select switch set to INT, the drives are designated as 
follows:

    Left Drive              Drive A
    Hard Disk               Drive B
    External Drive          Drive C

With the drive select switch set to EXT, the drives are designated as 
follows:

    Left Drive              Drive B
    Hard Disk               Drive C
    External Drive          Drive A

The 250-1087 1.2 MEG external floppy disk drive can also be used with the 
1400 HD computer.  Follow the instructions for the software driver included
with that unit.  DO NOT USE THE DRIVE SELECT SWITCH.  It expects something
to be connected to the external floppy port, which the 25-1087 does not
use.

(jej/tmc-04/21/95)