On Sun, 2006-03-12 at 01:35 +0100, Tobias Netzel wrote: > Am 12.03.2006 um 00:21 schrieb Daniel Gimpelevich: > > > On Sat, 11 Mar 2006 20:38:18 +0100, Tobias Netzel wrote: > > > >> I also modified your C translation to use the "in_8" and "out_8" > >> functions that should do everything necessary - "include/asm-ppc/io.h" > >> says that they include "barrier" what I think is the same thing as > >> eieio does. > >> But there is no difference in behavior to the versions without > >> "barrier" or the ones created by PortAsm. > > > > Part of the difficulty may be that the m68k architecture has no native > > support for PIO, only MMIO. Trying to figure out where the code should > > use > > PIO and where it should use MMIO is not something for which I was > > prepared. > > > The NuBus PMacs are not much more than 68k Macs with a PowerPC CPU. > Everything is mapped into memory and there are no I/O ports. > When one compares the developer notes of the PowerBook 190 (68k) and > the PowerBook 5300 (PPC) one will not find many differences. > The difference ia an adapted memory controller in that case - > everything else is the same. > So there shouldn't be a problem with PIO. > > But the swim driver is far from being complete (no write support) and > in my opinion it isn't worth the effort putting much time into getting > it to work True, floppies aren't of much use any more. I'd like to see it supported for completeness.
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