GXemul Code2

Minor update.

Fixing the LK201 keyboard self-test codes so that the 5000/125 PROM does not complain.

Continuing on making 5000/125 emulation work again: rewriting the interrupt code for the scc serial controller, and connecting TURBOchannel graphics cards.

Make the PROM run further.

Rewrote/refactored enough of the dec_ioasic code to make the 5000/125 original PROM output its first boot messages again (and NetBSD/pmax and OpenBSD/pmax too).

DECstation 5000/125 "3MIN" mode has been broken for quite a while; attempting to rewrite/resurrect it.

Updating the Sprite/DECstation URLs.

Applying a patch from Andreas Gustafsson (gson) for the MIPS div and ddiv instructions, which checks for divide overflow manually before doing the divide.

Updating HelenOS from 0.7.1 to 0.7.2.

Adding another VoCore linux kernel example.