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Radio Shack TRS-80 III User Manual

Radio Shack TRS-80 III
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SYSTEM OVERVIEW
The
Radio Shack TRS-80 Model
II
I Microcomputer
is
an
enhanced
version
of
Radio Shack's
popular
TRS-80
Microcom-
puter
(Model
I).
The
TRS-80
Model
III
is
software
compatible
with
the
Modell
so
that
owners
of
either system can
take
advantage
of
the
large
number
of
programs available.
Features
of
the
TRS-80 Model
III
which are
common
to
the
TRS-80 Model I include:
Availability
of
Level I
or
Level
II
BASIC in
ROM
Full size
typewriter
style keyboard
A 12-inch video display
Built-in cassette interface
Character display
of
16
lines
of
64
characters
Graphics
under
control
of
BASIC (128 H x
48
V)
UL recognized
construction
In
addition,
the
Model
III
has
the
following standard features:
12-key
numeric
keypad
for
rapid
entry
of
numbers
Rugged
cabinet
housing
keyboard,
electronics, video display, and power supply
Direct drive video
monitor
for improved resolution
Internal power supply
Parallel
printer
port
for
use with Radio Shack printers
Several
other
features are available when Level
II
BASIC
is
used;
features such as: real
time
clock,
upper
and lower case
characters,
RAM
internally
expandable
to
48K
bytes,
I/O
port
for
peripheral
expansion,
and
cassette interface available
with
500
and
1500
baud rates.
Optional peripherals
for
the
TRS-80 Model
III
include disk drives (two built-in,
two
external)
with
double
density
for
increased storage
capacity,
and
a built-in RS-232 serial interface
for
communications
and peripheral interface.
The
Block Diagram shows
the
various internal
components
and
connections
of
the
Model
III
Microcomputer.
3

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Radio Shack TRS-80 III Specifications

General IconGeneral
BrandRadio Shack
ModelTRS-80 III
CategoryDesktop
LanguageEnglish

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