Removing the old i960, HPPA-RISC, x86, and IA64 modes, and the PC bios emulation.
Changing the testmips and baremips machines to a MIPS64 r2 CPU by default, instead of r1.
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Commenting out the dyntrans_device_danger stuff in memory_rw.c.
Experimenting with removing the wdc interrupt slowness hack.
Changing from 60 to 120 dyntrans instructions per loop.
