Ronald G Minnich <[EMAIL PROTECTED]> writes: > On 6 Jul 2002, Eric W. Biederman wrote: > > > It depends on the architecture. In particular x86 doesn't do that, > > it fails silently. I believe alpha will give you a processor exception. > ^^^^^^^^^^^^^^^^^ > > well, that is braindead. Foolish me, I assumed that a modern chipset would > consider "issuing addresses to vapor" is a problem.
I think on some of them you can configure it so an exception is raised but that is definetily not the default. > On the other hand, > many of the designers of this hardware come from the background of the > microprocessor world with busses that didn't really support DTACK-style > hardware, so I guess I can understand it. > > OK, never mind my earlier comments. But at the very least let's make sure > that physical addresses are allocated on page granularity -- that > definitely has been an issue for me with standard BIOSes. I can explain > more why if anyone wants to know. For what I'm doing page granularity doesn't sound like a problem. Pages shouldn't affect the packing granularity very much. I have a hunch why this could be an issue but hearing a supporting story would be nice. > ron > > p.s. Anybody remember "DTACK grounded :-)" DTACK grounded. Nope sorry I'm just a software pretending he know how the hardware works :) Eric
