To access the BASIC interpreter, simply position the Cursor over the word BASIC
and press
CEmR.l.
The Display will then look like this:
TRS-8~
Model
100
Software
(cpr.
1983
Microsoft
21190
Bytes
free
Ok
The number 2
11
9
QI
indicates the number of free bytes for creating any programs and
it may vary depending upon the capacity
of
your machine and whether any other files
have been created and saved.
The word 0
k and the flashing cursor symbol below it, indicate that you are in the
Command Mode
of
BASIC and ready to begin programming.
Experiment
#1
Entering a Command
A command
is
an instruction to the Computer ordering it to
do
something
immediately. In this experiment you will learn how to enter a simple command.
First you will attempt to have the Model
100 print out a name on the display. Type
the name:
JOHN
SMITH
You may use any other name. Now, press
~.
As soon as you do this, the
Computer displays the message:
?8N
Error
This message indicates that an error, specifically a syntax error, has been made. The
syntax error occurred because the Computer doesn't recognize John Smith
as
part
of
its vocabulary (also known
as
the Instruction Set).
The correct way to instruct the Computer to print the name
is
to type:
PR
I
NT
II
JOHN
8M
I
TH
II
(ENTER)
Be
sure to press
~
at the end
of
the line. The key word PRINT and the
quotation marks enclosing the name are recognized as part
of
the Computer's
vocabulary. This way no syntax error occurs and the name appears printed right below
the command.
4
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