Re: how to tell linux (on x86) to ignore 1M or memory

2007-06-22 Thread Rene Herman
On 06/23/2007 01:00 AM, Bodo Eggert wrote: The real mode on i386+ can actually access the whole 4GB address range due to a former-bug-now-feature in the i386+. Generally called "unreal mode". Yes, sure. Just a hack though. Rene. - To unsubscribe from this list: send the line "unsubscribe linu

Re: how to tell linux (on x86) to ignore 1M or memory

2007-06-22 Thread Bodo Eggert
Rene Herman <[EMAIL PROTECTED]> wrote: > The point was that real mode could only access the first 1M, not > the first 16... :-) The real mode on i386+ can actually access the whole 4GB address range due to a former-bug-now-feature in the i386+. This "bug" causes the segment limit to not be reset

Re: how to tell linux (on x86) to ignore 1M or memory

2007-06-22 Thread Rene Herman
On 06/22/2007 03:46 AM, H. Peter Anvin wrote: Rene Herman wrote: On 04/19/2007 04:18 PM, Bart Trojanowski wrote: I need to preserve some state from the bios before entering protected mode. For now I want to copy it into some ram accessible by real-mode, say the last megabyte visible in real-

Re: how to tell linux (on x86) to ignore 1M or memory

2007-06-21 Thread H. Peter Anvin
Rene Herman wrote: > On 04/19/2007 04:18 PM, Bart Trojanowski wrote: > >> I need to preserve some state from the bios before entering protected >> mode. For now I want to copy it into some ram accessible by >> real-mode, say the last megabyte visible in real-mode. >> >> What's the easiest way to

Re: how to tell linux (on x86) to ignore 1M or memory

2007-04-20 Thread Bodo Eggert
Rene Herman <[EMAIL PROTECTED]> wrote: > On 04/19/2007 04:18 PM, Bart Trojanowski wrote: >> I need to preserve some state from the bios before entering protected >> mode. For now I want to copy it into some ram accessible by real-mode, >> say the last megabyte visible in real-mode. >> >> What's

Re: how to tell linux (on x86) to ignore 1M or memory

2007-04-20 Thread Rene Herman
On 04/19/2007 04:18 PM, Bart Trojanowski wrote: I need to preserve some state from the bios before entering protected mode. For now I want to copy it into some ram accessible by real-mode, say the last megabyte visible in real-mode. What's the easiest way to have linux ignore the megabyte st

Re: how to tell linux (on x86) to ignore 1M or memory

2007-04-19 Thread Paolo Ornati
On Thu, 19 Apr 2007 10:18:04 -0400 Bart Trojanowski <[EMAIL PROTECTED]> wrote: > I need to preserve some state from the bios before entering protected > mode. For now I want to copy it into some ram accessible by real-mode, > say the last megabyte visible in real-mode. > > What's the easiest way

how to tell linux (on x86) to ignore 1M or memory

2007-04-19 Thread Bart Trojanowski
I need to preserve some state from the bios before entering protected mode. For now I want to copy it into some ram accessible by real-mode, say the last megabyte visible in real-mode. What's the easiest way to have linux ignore the megabyte starting at 15M? Cheers, -Bart - To unsubscribe from t