Handshaking

XON/XOFF handshaking capability, not available in HP BASIC, has been added to HTBasic. This capability is turned on by CONTROL 9,100;1 and turned off by CONTROL 9,100;0. It is on by default. XON is ^Q (DC1) and XOFF is ^S (DC3).

Hardware handshaking is also supported. It is turned on by

CONTROL 9,5;0 ! use DTR and RTS

CONTROL 9,12;0 ! read DSR, CD, and CTS

CONTROL 9,100;0 ! make sure XON/XOFF is disabled

It is turned off by

CONTROL 9,5;3 ! hold DTR and RTS active

CONTROL 9,12;176 ! ignore DSR, CD, and CTS

CONTROL 9,100;1 ! optionally enable XON/XOFF

By default, hardware handshaking is off.