GXemul Code2

Updating for next step in potential VoCore emulation.

Some basic info about the VoCore address space.

Implementing the rorv (aka rotrv?) MIPS instruction.

Adding info to the unsupported page about how to start experimenting with Linux/VoCore kernels.

Adding a dummy VoCore machine skeleton using the old framework (with the wrong CPU type 4KEc instead of 24K).

Ooops, fix bug.

Minor update.

Allow testmips programs to detect whether the X11 framebuffer is in use or not (returns 0x0 as resolution if not).

When reading disk sectors from the disk device (for e.g. testmips), automatically move to the next sector after reading (or writing).

Comment about attempting relogon for ULTRIX.