Technical information

Serial Solutions Newcom Parameters
Xon-Xoff Handshaking.
Switch: /X [range] [,xon,xoff]
Purpose:
Set port COMn to XON/XOFF handshaking. In this mode
the hardware handshake lines are ignored and the characters
XON and XOFF are used to control the flow of characters on
the serial line.
’range’
specifies the COM port. Range may be a SINGLE port OR
a RANGE of ports. If range is not specified the
XON/XOFF handshake is applied to all serial ports.
’xon, xoff’
The optional parameters XON and XOFF are decimal
numbers which are to be used as the XON and XOFF
characters. Their default values are 17 (DC1) and 19
(DC3) respectively.
Single port example:
/X2 XON/XOFF handshake used by COM2
/X3,18,20 XON/XOFF handshake used by COM3
Data flow started by char code 18 and stopped by
char code 20.
If the port range is not given, then XON/XOFF handshaking and
any specified handshake characters are set for all ports, as
/X XON/XOFF handshake used by all ports.
/X,18,20 XON/XOFF handshake used by all ports.
Data flow started by char code 18 and stopped by
char code 20.
When a range of ports is given the XON/XOFF handshake
applies to all the ports within the specified range.
Range port examples:- (new method:- less typing, easy to
understand)
/X-4 XON/XOFF handshake used by COM1 to COM4.
/X8-10 XON/XOFF handshake used by COM8 to COM10.
/X13- XON/XOFF handshake used by COM13 to maxport.
eg NEWCOM.SYS supports up to 16 COM ports.
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