Radio Shack TRS-80 Trsdos & Disk Basic Reference Manual

Mini
Disk
Operation
Introduction
The
TRS-80
Mini
Disk
drive is a
mass
storage
device
custom
manufactured
for
use
with the
TRS-80
Microcomputer.
It combines
the
compactness
of a
cassette
recorder
with the
high-speed,
reliable
data
access of
the larger
disk drive
units.
Information
is
magnetically
recorded
on
and
read from
flexible
("floppy")
diskettes.
In
simplified
terms,
the
Mini
Disk consists
of a
magnetic
read/write
head,
similar
to
that on a
tape
recorder;
a
stepper
motor to
move the
head
across
the
diskette
surface; a
drive
motor
and hub
assembly
to
rotate
the
diskette;
and
the
necessary
logic
circuitry to
control
the
read/write
process
and
the motor
speed.
See
Figures
1
and
2.
There are
two types
of drives,
distinguished by
their
Radio
Shack
Catalog
Numbers,
26-1
160 and
26-1
161.
Your
disk system
must include
one
(and
only one)
26-1
160 and
may
include up to
three
26-1
161
drives.
Included
with
26-1160
Drive unit:
Incorporates
special
terminating resistors
not
present in
the
26-1
161
units.
Interconnect
cable:
For con-
nection of
26-1
160 and
up to
three
optional
26-1
161
drives
to
the
Expansion
Interface.
1
TRSDOS diskette:
Contains
the
operating
system software,
utilities,
DISK BASIC, etc.
Included with
each
26-1
161
Drive unit:
Does not
incorpo-
rate
terminating
resistors.
Blank diskette:
Can be
formatted
or backed
up
for
use
with
TRSDOS.
\i
Figure
1. Mini
Disk
Drive.
MAGNETIC
READ/WRITE
HEAD
DISKCONTROLLE
Figure 2.
Functional
components
in
a
Mini Disk
drive.
2-2

Radio Shack TRS-80 Specifications

General

Brand	Radio Shack
Model	TRS-80
Category	Desktop
Language	English