Is there nothing related to the serial port under DOS?
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中国DOS联盟论坛 » DOS开发编程 & 发展交流 （开发室） » Is there nothing related to serial ports under DOS?
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Original Poster
Posted 2007-08-27 22:45 · 中国 广东 广州 鹏博士宽带
Floor 2
Posted 2007-09-15 02:45 · 中国 黑龙江 哈尔滨 电信
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Posted 2007-09-27 09:08 · 中国 四川 德阳 电信
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Posts 13
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How to program to control the RS232 serial port in pure MSDOS 6.22 with detailed information and source code
http://www.cn-dos.net/forum/viewthread.php?tid=33505
http://www.cn-dos.net/forum/viewthread.php?tid=33505
Floor 4
Posted 2007-10-16 19:06 · 中国 广东 东莞 电信
Floor 5
Posted 2007-10-25 21:47 · 中国 福建 泉州 电信
Floor 6
Posted 2007-11-12 11:58 · 中国 福建 厦门 电信
MSC51 uses 5V CMOS levels, which are different from RS232's ±12V levels. If directly connected to MSC51, only current loops can be used and optocoupler isolation is required. Now it is usually recommended to use a 232 chip (such as MAX232) for level conversion before connection.
Floor 7
Posted 2007-12-27 23:11 · 中国 广东 广州 鹏博士宽带
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