12.04.2012 17:28, Paul Crawford wrote: > I noticed in the dosemu configuration file the comment "Note that IRQ > passing does not work on x86-64". > > I wondered if this is going to be fixed, or it is something fundamental > broken in 64-bit CPUs as compared to working with the vm86 option that > 32-bit CPUs provide? I can't comment on whether it is going to be fixed (haven't looked into dosemu for 6 years), but there is certainly nothing wrong with the CPUs: it is just an unimplemented feature in dosemu. The ad-hoc solution was to register the IRQ-triggered SIGIOs via the vm86() syscall. This syscall doesn't exist on the 64bit kernels, so dosemu "broke".
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