Radio Shack TRS-80 Model III - Page 6

TRS-80
MODEL
III
Contents
Operation
Section
1/ A Brief
Description
of
the
Computer
1
2/
Installation
5
3/
Operation
9
Power-On
RESET
Switch
Power-Off
D
Start-Up
Dialog
Modes of
Operation
Sample
Session
4/ Using
the
Keyboard
19
Capitals
and
Lowercase
Special
Keys
Control
Codes
5/
Using
the
Video
Display
23
Character
Size
Cursor
Scroll
Protection
Text
Graphics
Space
Compression
Special
Characters
6/
Using
the
Cassette
Interface
29
Cassette
Transfer
Speed
Loading
Errors
Saving
a BASIC
Program
on
Tape
Loading
a BASIC
Program
from
Tape
D
How
to
Search for
a
Program
Loading
a
SYSTEM
Tape
Searching
for
a
Program
7/ Using
a Line
Printer
35
Line
Printer
vs
Video
Display
Output
Printer
Control
Features
Print
Screen
Function
8/
Using
the
RS-232-C
Interface
41
What is
an
Interface?
Using
the
Model
III
as
a
Terminal
Programming
the
RS-232-C
9/ Routing
Input/Output
49
To
Route
from
One
Device
to
Another
Routing
Multiple
Devices
10/
Real-Time
Clock
53
To
Set
the
Clock
To
Read
the
Clock
To
Display
the
Clock
11/
Input/Output
Initialization
57
12/
Technical
Information
59
To
Protect
High
RAM
ROM
Subroutines
D
Memory
Map
Summary
of
Important
ROM
Addresses
Summary
of
Important
RAM
Addresses
13/ Troubleshooting
and
Maintenance
85
Symptom/Cure
Table
AC
Power
Sources
D
Maintenance
14/
Specifications
89
Power
Supply
Microprocessor
\J
RS-232-C
Interface
D
Parallel
(Printer)
Interface
D
Cassette
Interface