[issue995] DFly doesnt work on Vmware and Virtualbox

[Matthew Dillon]

    We still use the 8254 to generate timer interrupts for the
    systimer API.

    A great project, if you want one, would be to use the APIC on cpu #0
    (not ACPI)... the actual APIC timer, which can also generate interrupts,
    instead of the 8254.  So if the APIC is present, we'd use that.

    I do not think it would be very hard to do, and that combined with
    using the acpi timer for our real-time timebase would allow us to
    avoid the use of the 8254 entirely.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>