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中国DOS联盟论坛 » DOS开发编程 & 发展交流 （开发室） » Serial Communication and Connecting Cables View 1,517　Replies 4
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Original Poster Posted 2003-12-18 00:00　·　 中国 江苏 淮安 电信
xdb
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Under DOS, I'm using the serial port to transfer files between two 586 machines, using tc20, with the function int86(0x14,&reg,&reg). The serial port uses only three wires, and the other signal lines are not handled, but it cannot connect. LapLink 3.0 works normally. I'd like to ask everyone: when programming with the int14 interrupt, is a three-wire serial connection not workable? How should a three-wire serial connection be programmed (under DOS)? How should serial-port power stealing be programmed? Thanks! Very urgent.
Please email to xdb@29299.com
Floor 2 Posted 2006-05-12 10:48　·　 中国 陕西 西安 电信
luyanl
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Did you get your problem solved? I've run into the same problem too. Could you share the solution?
Floor 3 Posted 2006-05-12 11:18　·　 中国 甘肃 兰州 中移铁通
arding
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I don't really understand it well, just thinking out loud: during (handshaking? flow control) there are hardware methods and software methods. The hardware method needs several lines in addition to the three wires; the software method sends a few special characters to achieve it.
What I do know for sure is that PC serial port - PC serial port does not need power stealing.
Floor 4 Posted 2006-05-13 08:57　·　 中国 湖北 荆州 电信
jawbin
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Three wires will work, no need for power stealing
Floor 5 Posted 2006-05-24 01:01　·　 中国 浙江 宁波 电信
zjnbwdj
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