Log Message:
Update to 0.4.3.

Changes between release 0.4.2 and 0.4.3 include, among other things:

    o)	SuperH (SH4) emulation is now stable enough to let a NetBSD/dreamcast
	GENERIC_MD (ramdisk) kernel reach userland.

    o)	There is now a simple framework for letting emulated clocks, as seen
	by guest operating systems, run at the same speed as the host clock.

	So far, the DECstation, MobilePro (hpcmips), NetWinder, CATS, Malta
	(evbmips), Cobalt, Algor, Dreamcast, and testmips machine modes
	use the new clock/timer framework.

    o)	Some changes to the way expressions are evaluated in the built-in
	debugger, and some changes in command behaviour:

	  x)  Expressions (including assignments) can now be arbitrarily
	      complex, using parentheses, and the following operators:

	          + - * /    % (modulo)  ^ (xor)  & (and)  | (or)

	  x)  Some internal emulator variables can now be read/written using
	      normal expressions. Examples of commands that did not work
	      earlier, but should work now:

		  print verbose
		  r5 = sp - arch_pagesize * 4
		  machine[0].statistics_enabled = 1

	  x)  To force a name to be interpreted as a setting/register name,
	      a hash sign (#) is now used instead of the percentage sign (%).
	      (In the new expression evaluator, % means arithmetic modulo.)

	  x)  The 'focus' command now also selects a cpu, in addition to
	      selecting machine and emul.

	  x)  The 'reg' command only prints registers for one cpu now, not
	      all cpus in the currently focused machine.

    o)	The wdc (standard IDE controller) had a bug which prevented disk
	images larger than 2 GB to work correctly. This has been fixed.

    o)	For MIPS emulation, some combinations of emulated processor + guest
	operating system should now work better when idling (i.e. the host
	should not run at 100% CPU):

	  x)  For MIPS32/MIPS64 and RM5200, the 'wait' instruction should
	      now work more or less as expected.

	  x)  For VR41xx (e.g. MobilePro) emulation, the standby instruction
	      should work like the 'wait' instruction.

	  x)  For R3000 emulation, where there is no hardware wait instruction,
	      I've implemented "instruction combination" hacks for both
	      NetBSD/pmax and Debian/pmax, so that their cpu idle loops are
	      detected and treated almost as a wait instruction.

    o)	MIPS 64-bit address translation (X=1) was not fully working before;
	TLB exception handling for xkseg and larger-than-2GB-userland should
	now actually work. (Thanks to Juli Mallett and Carl van Schaik for
	noticing these problems.)

    o)	The mouse cursor update routines in DECstation (LK201) emulation
	previously used the fact that guest OSes set the _hardware_
	cursor position. In order to support X Windows when emulating
	modern versions of NetBSD/pmax, which don't set the hardware
	position anymore, a workaround has been implemented which only
	sends relative coordinates to the guest OS. This has two drawbacks:

	1. Ultrix emulation with dual- and tripple-head emulation will
	   most likely feel very strange. It will still work, though.

	2. Cursor movement feels "accelerated", because the emulator
	   sends unaccelerated movements to the guest OS, which then
	   accelerates them. This can however be compensated to some
	   degree by running 'xset m 1 0' in the guest OS.

	Having weird accelerated mouse movement is better than having no
	mouse support at all, so this change was necessary.