Lesson #2 Saving Programs - Radio Shack TRS-80 Model 100 Basic Manual

Lesson #2 Saving Programs
In this lesson you will learn how to save programs in memory and on cassette tapes.
You will IJ.lso learn how to recall a program from storage and how to merge a stored
program with another program.
Experiment #1 Saving a Program In RAM
As it was mentioned before, the Model 100 can hold several files, many 9f which can
be program files, In Lesson 1 you learned to write simple BASIC programs in the
BASIC system of the Computer. When you have written a program that you intend to
use repeatedly, it is a good idea to save it in memory (also known as RAM, for
Random Access Memory). When you save a program in RAM, in effect, you create a
program file.
The following program serves to demonstrate how any program can be saved in RAM:
10 PRINT "THIS IS A TEST"
20 PRINT "OF THE MODEL 100 COMPUTER"
Access BASIC. Clear working memory with the NEW command and then type the
program as it appears above.
Execute the program, The following will be displayed:
THIS 1::'1 A
TEf3'T
OF THE MODEL 100 COMPUTER
Uk
II
The first step for saving a program in RAM is to decide upon a filename. This
filename appears listed as a file in the Main Menu and it serves to identify the
program. Filenames cannot exceed six characters in length.
You may use any combination of letters and digits for a filename. However, the first
character in a filename must always be a letter. The following are examples of valid
filenames:
MYPROG
SKETCH
ACCNT2
15