[syslinux] "Tick-counting" vs "Tick-less" timekeeping issues on VMs emulating BIOS PCs

[Michael Brown]

On 02/03/16 22:47, Patrick Masotta via Syslinux wrote:
> Not really, a virtual environment can easily emulate the BIOS_timer	at 0x046C
> but it has problems emulating a "real" timer interrupt to be hooked...
> That's the real problem.

The timer interrupt works fine in at least KVM, Xen, VMware, and 
Hyper-V.  (I've tested iPXE in all of those virtual environments, and 
iPXE relies on the timer interrupt actually triggering a call to an ISR 
within the VM.)

Michael