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AIX Version 4.3 Kernel Extensions and Device Support Programming Concepts

Chapter 9. Low Function Terminal Subsystem

This chapter discusses the following topics:

The low function terminal (lft) interface is a pseudo device driver that interfaces with device drivers for the system keyboard and display adapters. Beginning with AIX Version 4.1, the lft interface adheres to all standard requirements for pseudo device drivers and has all the entry points and configuration code as required by the AIX Version 4.1 (or later) device driver architecture. This section gives a high-level description of the various configuration methods and entry points provided by the lft interface.

All the device drivers controlled by the lft interface are also used by AIXwindows. Consequently, along with the functions required for the tty sybsystem interface, the lft interface provides the functions required by AIXwindows interfaces with display device driver adapters.

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