Rick John

Committing experimental code (mostly NCD88K terminal related) that I had lying around; updating the TODO. Some of the committed changes perhaps do not actually work.

Fix for ARM carry flag update for some instructions (patch from Nick Hudson). Also updating the NetBSD/cats installation instructions to 9.2.

Only print the arm memory fault messages at appropriate level (debug).

Switch to normal color before the less-than sign when printing symbol names.

Storing to memory is not allowed until the CPU has initialized completely; this code was for ARM OpenFirmware, which is not currently in use by any machine.

The ARM "permanently undefined" instructions now result in an und exception (patch from Nick Hudson).

Updating the TODO.

Some better bailout in case breakpoints cannot be allocated.