The Implementation

A pilot implementation of a text only system was undertaken using X11 R3, and the Athena Widget library, on a set of Unix workstations (from various different vendors: one advantage of the choice of X is its machine independence). The star (shared memory) model was used; a single process runs the conference with X protocol connections to each display. An example of the actual user interface is shown later in the chapter. Some simplifications were found to be necessary after some experience with several users: The current implementation includes the <#1318#> Valve<#1318#> to allow floor control, but none of the rich floor control mechanisms have yet been implemented. These will be added. Reports from users are that floor control is definitely required when more than two users are present. The main reason quoted is simply to limit the amount of text appearing at once.