波士电子：RS-232/RS-485正宗专业厂家
BOSI electronics：RS-232/RS-485 expert English 中文
About BOSI Products Software Sales
scommassistant:RS-232 test software for Windows.
NTPort:General PC hardware port I/O read/write dll (Windows XP/2000/NT/Me/98/95,
regist code is delievered with type S812A data acquistion system)
commix:Serial port debug tool