From: utzoo!decvax!harpo!floyd!saf Newsgroups: net.general Title: UNIX tty protocol timing Article-I.D.: floyd.218 Posted: Mon May 17 13:25:34 1982 Received: Tue May 18 01:13:52 1982 I am building a tube for home use (based on an 8085). It has a 128 byte buffer for incoming data. I want to incorporate ^S/^Q protocol for high baud rates. The question is: How long does it take for a timesharing system like BSD 4.1 (or any system for that matter) to respond to ^S? I guess this could be expressed as the number of characters sent by the system after ^S is sent by the terminal or more likely as the number of milliseconds before ^S takes effect. I need this data to decide on the proper thresholds for my buffer. Specifically - how many characters should I let accumulate before sending ^S and how many of the accumulated characters I should process before sending ^Q? If you have any information on this topic please respond via mail to floyd!saf. Steve Falco (201) 386-4865 BTL WH