Contents, cont'd. - Intermec

ON BREAK GOSUB
Chapter 2 Program Instructions
Field of Application Statement for branching to a subroutine, when break interrupt instruction
is received.
Syntax ON BREAKGOSUB|
↔
is one of the following communication channels:
0 = "console:"
1 = "uart1:"
2 = "uart2:"
3 = "uart3:"
4 = "centronics:"
| is the number or label of the program line to be branched to.
Remarks This statement is closely related BREAK and BREAK ON/OFF. When
break interrupt is enabled (see BREAK ON) and the operator issues a break
interrupt instruction (see BREAK), the execution of the currently running
program will be interrupted and branched to a specified line in a subroutine.
Examples In this example, the printer emits a special signal when a break interrupt is
issued from the printer's keyboard:
10 ON BREAK 0 GOSUB 1000
20 GOTO 20
. . . . .
. . . . .
1000 FOR A%=1 TO 3
1010 SOUND 440,50
1020 SOUND 349,50
1030 NEXT A%
1040 END
The same example without line numbers will look like this:
IMMEDIATE OFF
ON BREAK 0 GOSUB QQQ
WWW: GOTO WWW
. . . . .
. . . . .
QQQ: FOR A%=1 TO 3
SOUND 440,50
SOUND 349,50
NEXT A%
END
IMMEDIATE ON
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