Inside Macintosh: Networking With Open Transport / Part 2 - Open Transport Reference

Chapter 31 - Serial Endpoint Reference

Serial-Specific Commands

Serial endpoints support several serial-specific commands that use the OTIoctl function. The csCode value for each routine is listed in each command's description. For information about Device Manager functions for opening, closing, and communicating with device drivers, see the book Inside Macintosh: Devices.