7.2.2. Control System

Keyboard interrupts are still dubious. This has been improved over the 1a1 release.

The frames described in the doco are now implemented, more or less. Still needs some work.

No threads yet, but the frame implementation is good preparation for supporting them.

The SGML input filter is too primitive.

There's no error handling system. There's error handling, but i wouldn't call it a 'system' :-)

The markup filters are in the wrong place.