Hi, > We have a software that runs on MS-DOS and must communicate with a specific > card installed on port isa. > We want to use this software in Qemu with a machine that runs XP. > Is it possible to access to the ISA port with Qemu in this case? > > Do we have to do a specific development? > Can you help us in this development, how much would it cost?
I believe some people already implemented PCI pass-through, or ported it from other emulators (Bochs had one IIRC), you'd have to check the mailing list : http://search.gmane.org/?query=pci+pass+through&group=gmane.comp.emulators.qemu Essentially you'd have to write the same kind of thing but for ISA, except you'll have to specify the resources manually since the card isn't published as a specific entity on ISA busses (PnP ones excepted). Passing through I/O ports should be easy, but IRQ forwarding or even DMA if you need it might require some more work. François.
