Terminal Emulation

The lft interface is a stream-based tty subsystem. The lft interface provides VT100 (or IBM® 3151) terminal emulation for the standard part of the ANSI 3.64 data stream. All line discipline handling is performed in the layers above the lft interface. The lft interface does not support virtual terminals.

The lft interface supports multiple fonts to handle the different screen sizes and resolutions necessary in providing a 25x80 character display on various display adapters.