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 the easiest way to have linux ignore the megabyte starting at 15M?
>
> Note that real-mode can only access the first megabyte (*) and not the first
> 16. 16MB is the 16-bit protected mode (286) limit.
>
> (*) well, the first 1M + 64K - 16 bytes using segment FFFF assuming A20 is
> enabled and x > 1 in x86...
Interrupt 15h, function 87h allows copying from/to extended memory.
You might like to look into Ralph Brown's interrupt list for more details.
You could also cpio-gzip the data and append it to the initramfs.
--
Fun things to slip into your budget
Does that line item say 'Personal Massage System' Oops, it's supposed to be
'Message'. Go ahead and sign the authorization, Boss; I'll correct it later.
(Iike Hell I will)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
