Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Keywords
TROFF, TRON
Statements
TROFF
TRON
Turn the trace function on/off.
TRON turns on the tracer and TROFF turns it
off.
The tracer lets you follow program flow. This is helpful for de-
bugging and for analyzing the execution
of a program. After a
program
is debugged, you can remove the TRON and TROFF
statements
.
Each time the program advances to a new line, the tracer dis-
plays that line number inside a pair
of brackets.
Sample Program
2290 TRON
2300 X = X * 3.14159
2310
TROFF
Lines 2290 and 2310 assure you that Line 2300 is actually
being executed, because
[23001 is printed on the display each
time it is executed.
5 TRON
10 K=10
20
FOR J=l TO 2
30 L=K+10
40
PRINT J;K;L
50 K=K+10
60
NEXT J
70
TROFF
80 END
When you run this program, BASIC prints:
[101[201[301~401 1 10 20
~501~601[301[401 2 20 30
[501[601[701
332

Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200