PReP interrupts now work again.
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Adding an "mp" demo to the demos directory.
Removing the AVR32 mode.
Removing the db64360 machine mode.
Removing the Olivetti M700 mode (broken and unsupported anyway).
Bug fix.
Removing the old i960, HPPA-RISC, x86, and IA64 modes, and the PC bios emulation.