This version of the lines demo was compiled with Lattice C 3.04, beta B.
It was run and tested under Workbench 1.2, Alpha 9.

When compiled with Manx 3.20b it crashes the machine.

The executable seems to be somewhat "flakey".  That is, it doesn't
always work correctly.  Moving the window and resizing to about 4 inches
by 4 inches seems to help get it started.

-Fred