SAXTON@SLACSLD.BITNET.UUCP (04/14/87)
> Has anyone ever written (or knows) a program to generate a BREAK > character and send it down a VAX terminal line in order to get the > attention of another computer (connected to that terminal line) > which "wakes up" only on BREAK characters ? I did once write a program to send a break signal on a specified DZ11 terminal line, but with VMS version 4, such a program is redundant. There is now a "parity flag" value of TT$M_BREAK that can be specified with the $QIO IO$_SETMODE function to turn on the break state. A second $QIO (sent after the appropriate time, usually 0.2 sec) with the TT$M_BREAK bit turned off is needed to turn the break state off again. This is documented in section 8.4.3 of the (version 4.4) I/O User's Reference Manual: Part I. Owen Saxton Bitnet: SAXTON@SLACSLD Hepnet: SLD::SAXTON