Messages in this thread |  | | Date | Tue, 05 Dec 2000 17:10:08 -0800 | From | "H. Peter Anvin" <> | Subject | Re: That horrible hack from hell called A20 |
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Linus Torvalds wrote: > > Actually, I bet I know what's up. > > Want to bet $5 USD that suspend/resume saves the keyboard A20 state, but > does NOT save the fast-A20 gate information? > > So anything that enables A20 with only the fast A20 gate will find that > A20 is disabled again on resume. > > Which would make Linux _really_ unhappy, needless to say. Instant death in > the form of a triple fault (all of the Linux kernel code is in the 1-2MB > area, which would be invisible), resulting in an instant reboot. > > Peter, we definitely need to do the keyboard A20, even if fast-A20 works > fine. >
Yup. It's a BIOS bug, oh what a shocker... (that never happens, right)?
I might hack on using INT 15h to do the jump to protected mode, as ugly as it is, but I won't have time before my trip. It would require quite a bit of restructuring in setup.S, and would probably break LOADLIN.
-hpa
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