Enables or disables data communications event trapping on the specified port.
COM
(n) ON
COM
(n) OFF
COM
(n) STOP
n is the number of the communications adapter 1 or 2.
Execute a COM(n) ON
statement before ON COM(n) statement to allow trapping. After COM(n) ON
, if a nonzero number is specified in the ON COM(n) statement, BASIC checks every new statement to see if any characters have come in the communication adapter.
With COM(n) OFF
, no trapping takes place, and all communications activity will be lost.
With COM(n) STOP
, no trapping takes place. However, any communication that takes place will be remembered so that immediate trapping will occur when COM(n) ON
is executed.
ON COM(1) GOSUB ComHandler
COM(1) ON