XON/XOFF values

XON is ^Q, XOFF is ^S -- I just remember that they are S and Q, with the S standing for Stop and the Q for Qontinue. ^A has a hex value of 1 (0x01), so if you know that T is the twentieth letter in the alphabet, then you can figure out that ^S is 0x13 and ^Q is 0x11. SOme ASCII charts have them as DC3 and DC1, respectively -- the DC part stands for Device Control.

--t. alex

"Mud, mud, glorious mud. Nothing quite like it for cooling the blood!"
--Michael Flanders and Donald Swann

Comment on XON/XOFF values

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Re: XON/XOFF values by BrowserUk (Patriarch) on Aug 01, 2002 at 03:21 UTC
++. I couldn't remember, its been a long time since I played with comm ports. 14 & 15 are of course ShiftIn and ShiftOut which are (or maybe have been) used for similar handshaking purposes under some protocols.	[reply]