Remote-processing BASIC 52 Instrukcja Użytkownika Pobierz pdf (Strona 95)

RPBASIC-52 PROGRAMMING GUIDE

2-76

The overall speed of RPBASIC-52 slows down by about 3% when all ON LINE tasks are enabled.

Review HARDWAR E AND SOFTWARE INTERRU PTS in the first part of this manual for interrupt

handling and multitasking information.

RELATED none

ERRORS

BAD ARGUM ENT when number > 7 or I/O line is not between 0-7 or 100-123.

EXAMPLE

The following example sets up several interrupts.

10 ON LINE 0,1,1000

20 ON LINE 5,2,2000

30 ON LINE 3,3,3000

1000 PRINT "In LINE 0 interrupt"

1100 RETURN

2000 PRINT "In LINE 5 interrupt."

2010 PRINT "Suspending other line interrupts."

2020 ON LINE OFF

2300 PRINT "Resuming line interrupts."

2310 ON LINE ON , CLEAR

2320 RETURN

3000 PRINT "In LINE 3 interrupt."

3010 RETURN

Lines 10-30 set up ON LINE interrupts for lines 1, 2, and 3. For this example, line 5 cannot be interrupted by

any other line changes. Line 2020 suspends interrupts. The program continues to process this subroutine and

lines are still checked for changes. Line 2310 resumes line interrupts but it also clears out previous changes.

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Remote-processing BASIC 52 Instrukcja Użytkownika Strona 95