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How compatible are USB based Serial Ports? What should I be aware of?

April 26, 2017based compatible ports serial USB

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How compatible are USB based Serial Ports? What should I be aware of?

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Applications written for Windows 98/SE/ME/XP or 2000 which use the standard Windows drivers will work properly. Older software written for DOS or which only works with Com1 to Com4 in Windows 95/98/SE/Me may have problems. This includes many PLC utilities and software attempting RS-485 transmitter control using RTS. Automatic Send Data Control is recommended for RS-485 use in Windows. Contact the software manufacturer to inquire if their application works with USB & PCI based Com ports. If not, you will need to use a motherboard or ISA bus com port set to a legacy address and IRQ.