> > Jonathan Lemon <jle...@americantv.com> says: > > : > > : Not true. VM86 is also required to support VESA. Also, it is used > > : for reliable memory detection (which is why I want to make it mandatory). > > : No more "My Stinkpad only detected 64M, what do I do now??!" questions. > > > > Actually, even with VM86, the kernel still doesn't correctly detect the > > StinkPad's memory.
This is because the BIOS probe results are still ignored. 8( > It just occurred to me that we might be able to use initial MTRR settings > by BIOS for memory detection (P6 and above, of course). Don't know how > reliable that is. Not at all. If there's 640k chopped off the end of eg. 128M of physical memory, you'd have to use a 64M segment, a 32M segment, a 16M segment, an 8M segment, a 4M segment, a 2M segment, a 1M segment, a 256k segment and a 128k segment to map it accurately. That's 9 variable MTRRs, and the P6 only has 8. -- \\ The mind's the standard \\ Mike Smith \\ of the man. \\ msm...@freebsd.org \\ -- Joseph Merrick \\ msm...@cdrom.com To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-current" in the body of the message
