Non-legacy Serial Port Requirements

This section defines PC 98 requirements for non-legacy implementations in support of serial port capabilities.

9. Serial port meets device class specifications for its bus

Required

As required for all PC 98 devices, a serial port implementation that uses a non-legacy bus must meet the specific device class requirements for that bus.

For example, a USB serial port implementation must comply with all related USB specifications, including:

Universal Serial Bus Specification, Version 1.0 or higher (also known as the USB core specification)

Universal Serial Bus Device Class Definition for Communication Devices, Version 1.0 or higher
The “Standard Serial Interface Circuit Emulation” appendix in the USB Device Class Definition for Communication Devices specifically addresses serial-port compatibility.