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<?xml version="1.0" encoding="gb2312"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"/><title>Xon/Xoff(英文) turbolinux </title></head><body><center><h1>BBS 水木清華站∶精華區</h1></center><a name="top"></a>標 題: Xon/Xoff(英文) <br />發信站: BBS 水木清華站 (Fri Sep 13 11:41:21 2002), 站內信件 <br /> <br />Xon/Xoff (sometimes written "X-on/X-off" or "XON/XOFF" and pronounced <br />eks-AWN eks-AWF) is a protocol for controlling the flow of data between <br />computers and other devices on an asynchronous serial connection. <br /> <br />For example, a computer typically sends data to a printer faster than the <br />printer can print. The printer contains a buffer where data is stored until <br />the printer catches up with the computer. If the buffer becomes full before <br />the printer catches up, a small microprocessor in the printer sends back an <br />X/off signal to stop sending data. When enough data is printed and buffer <br />storage becomes free, the printer sends an X/on signal telling the computer <br />to resume sending data. <br /> <br />The "X" stands for "transmitter" so the X/on and X/off are signals to turn a <br />transmitter on or off. The actual signal for X/on is the same bit configuration <br />as the ASCII Ctrl-Q keyboard combination. The X/off signal is the Ctrl-S <br />character. <br /> <br />When you define your modem to your computer's operating system, you may need <br />to specify the use of flow control with X/on/Xoff or with CTS/RTS (Clear to <br />Send/Ready to Send). When sending binary data, Xon/Xoff may not be recognized <br />because it is character-encoded. <br /> <br /> <br /> <br /> <br />-- <br /> <br />※ 來源:·BBS 水木清華站 smth.edu.cn·[FROM: 166.111.65.245] <br /><a href="00000005.htm">上一篇</a><a href="javascript:history.go(-1)">返回上一頁</a><a href="index.htm">回到目錄</a><a href="#top">回到頁首</a></center><center><h1>BBS 水木清華站∶精華區</h1></center></body></html>
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