On Tue, 9 Feb 2010, Anthony Liguori wrote: > On 02/09/2010 05:25 PM, Aurelien Jarno wrote: > > On Wed, Feb 10, 2010 at 01:41:01AM +0300, malc wrote: > > > > > On Tue, 9 Feb 2010, Natalia Portillo wrote: > > > > > > > > > > Xenix is currently working (when copied from real hardware). > > > > As well Interactive UNIX and some other non-DOS from 8086 and 286 era. > > > > > > > > I'm not really sure that operating systems (specially the 8086 ones that > > > > do > > > > mmu functions in software) will be happy with the PCI bus present. > > > > > > > > Same for first 386 operating systems (OS/2 2, UNIX, Xenix, so on). > > > > > > > News to me that OS/2 worked.. I don't quite remember which version > > > someone (you?) asked me to try on IRC a few years back, but it definitely > > > didn't work. > > > > > > > > I have got OS/2 warp working under QEMU a few years ago. I couldn't give > > more details though, I just remember it was working nicely. > > > > The problem with isapc is that it uses a different chipset (or rather, doesn't > use a PCI chipset). I think the current thinking with target-i386 config > files is that while you should be able to customize the system, some of the > core bits would always be there. For instance, the PCI chipset, the APIC, > etc. These things are very tied to a platform.
APIC is almost as good as useless without ACPI and we have a switch to disable that. > > Firmware is really hard to implement if you have to deal with supporting > multiple chipsets. > > Also, if we don't have a workload that actually needs isapc, that suggests > that there's no real way to test that isapc doesn't have non-ISA things creep > into it. > > Given that, I'm inclined to suggest that we mark isapc as deprecated, give > people some time to comment on it, and then provided that we still don't think > it's necessary, change isapc to simply use isa devices while still using a PCI > chipset. Not to comment, to give hard evidence that something is working with isapc and doesn't otherwise, in which case it must stay. -- mailto:av1...@comtv.ru
