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TRS-80 PC-3
Radio Shack TRS-80 PC-3 User Manual
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Input
Display
3.0/5
Pressing
DELete
causes
all
the
characters
to
shift
one
space
to
the
left.
It
deletes
the
character
that
the
cursor
is
"on
top
of"
and
the
space
the
character
occupies.
The
flashing
cursor
stays
in
the
same
position
indicating
the
next
location
for
input.
Since
you
have
no
other
changes
to
make,
complete
the
calculation.
Input
Display
60.
I
(Note:
Pressing
the
SPaCe
key,
when
it
is
positioned
over
a
character,
replaces
the
character
leaving
a
blank
space.
DE
Lete
eliminates
the
character
and
the
space
it
occupies.)
Errors
Recalling
your
last
entry
is
essential
when
you
get
the
dreaded
ERROR
message.
Let
us
image
that,
unintentionally,
you
typed
th
isentry
into
the
PC-3:
Input
ERROR
1
31
32
34
Table of Contents
Table of Contents
5
Default Chapter
10
Introductory Note
10
Chapter 1 How to Use this Manual
11
Chapter 2 Introduction to the
13
ALL RESET Button
19
Installing the Batteries
21
Chapter 3 Using the Pc-3 as a Calculator
25
Start up
25
Shut down
25
Auto off
26
Some Helpful Hints
26
Simple Calculations
27
Recalling Entries
28
Errors
33
Serial Calculations
34
Negative Numbers
36
Compound Calculations and Parentheses
38
Using Variables in Calculations
39
Chained Calculations
41
Chapter 4 Concepts and Terms of Basic
43
Numeric Constants
43
Scientific Notation
43
Limits
45
Hexadecimal Numbers
45
String Constants
46
Variables
47
Simple Numeric Variables
47
Simple String Variables
47
Numeric Array Variables
48
String Array Variables
49
Preallocated Variables
49
Expressions
51
Numeric Operators
51
String Expressions
52
Relational Expressions
53
Logical Expressions
54
Parentheses and Operator Precedence
57
Calculator Mode
58
Functions
58
Chapter 5 Programming the
60
Programs
60
BASIC Statements
60
Line Numbers
60
BASIC Verbs
61
BASIC Commands
61
Modes
62
Beginning to Program on the
62
Example 1 - Entering and Running a Program
63
Example 2 - Editing a Program
64
Example 3 - Using Variables in Programming
67
Example 4 - more Complex Programming
70
Storing Programs in the PC-3'S Memory
71
Chapter 6 Shortcuts
73
The DEF Key and Labelled Programs
73
Reserve Mode
74
Templates
76
Chapter 7 Using the Pc-3 Printer/Cassette Interface
77
Introduction of the Machine
77
Power
79
Connecting the PC-3 Pocket Computer to the PC-3 Printer/Cassette Interface
81
Loading the Paper
83
Using the Printer
85
Using a Cassette Recorder
87
Care and Maintenance
90
Errors
90
Chapter 8 Basic Reference
95
Commands
96
Verbs
97
Functions
98
Pseudovariables
98
Numeric Functions
98
String Functions
98
Table of Contents
237
Newton's Method for Finding Roots of Equations
238
Average, Variance and Standard Deviation
243
Intersection between Circles and Straight Lines
250
Number of Days Calculation
256
Typing Practice
260
Softlanding Game
265
Memory Checker
270
Bughunt
276
Double Rotation
282
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Radio Shack TRS-80 PC-3 Specifications
General
Type
Programmable Calculator
Model
TRS-80 PC-3
Category
Calculator
RAM
1.9 KB
Display
24-character LCD
Power Source
2x CR2032 batteries
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