Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Kevwords
ERROR Statement
ERROR code
Simulates a specified error during program execution.
Code is an integer expression in the range 0 to 255 specifying
one
of BASIC's error codes.
This statement
is used mainly for testing an ON ERROR GOTO
routine. When the computer encounters an
ERROR statement, it
proceeds as if the error corresponding
to that code has occurred.
(Refer
to Chapter 12 for a listing of error codes and their
meanings.)
Example
ERROR 1
causes a "NEXT without FOR" error (Code 1) when BASIC
reaches this line.
Sample Program
110 ON ERROR GOTO 400
120 INPUT "WHAT IS YOUR BET"; B
130 IF B>5000 THEN ERROR 21 ELSE GOTO 420
400 IF ERR = 21 THEN PRINT "HOUSE LIMIT IS
$5 0 0 0"
410 IF ERL = 130 THEN RESUME 500
420 S = S+B
430 GOTO 120
500 PRINT "THE TOTAL AMOUNT OF YOUR BET 1S";S
510 END
This program receives and totals bets until one of them exceeds
the house limit.
157

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