100 REM TRY
110 ONERR GOTO 160"CATCH
120 PRINT 1E99
130 POKE 216,0
140 PRINT "NEVER REACHED."
150 GOTO 200"END TRY
160 REM CATCH
170 POKE 216,0
180 LET E = PEEK (222)
190 PRINT "ERROR "E" OCCURRED."
200 REM END TRY