Virtual Motherboard Sources

[umps]: include h/main.h in systembus.cc

workin on the gdb remote interface
intermediate state not finished

removing interactive stuff

added two functions to cancel waiting for
loads to complete or for events. Usefull if the user
wants to interrupt the regular operation of a simulator.

first successful compile, no test nor debugging yet

These files are from the old mmix motherboard projct and
are used as a starting point for the new implementation.

this is going to be the gdb version of the mmix simulator on
the virtual motherboard. Initialy it contains the basic files
from the normal mmix simulator for the virtual motherboard.

It will be stripped from all interaction with the user.
A remote interface to gdb will be added.
A tracing facility will remain.
There will be no loading of application programms as
this will be done through gdb in the elf format.

A special implementation of gdb for the mmix architecture
is required but I hope this can be incorporated into
the regular gdb distribution.

improved tracing with and without operating system
and for RESUME. the -B option is now optional

making mmix survive a reset

[umps]: more cleanup.