Re: [SeaBIOS] IDT issue

[Kevin O'Connor]

On Thu, Mar 19, 2015 at 06:59:19PM +0530, Naresh G. Solanki wrote:
> Hi,
>
> With respect to the auto reset issue,
>
> I did detailed memory test on my board and found the following
> 0xA0000 - 0xBFFFF & 0xE0000 - 0xFFFFF region is not writable and every byte
> reads as 0xFF.

0xA0000-0xC0000 is the legacy vga range, it's not normally mapped to
memory, and can not (in normal cicrcumstances) be used as memory.

The 0xC0000-0x100000 region is the historic BIOS and option rom
location.  It almost certainly can be used as memory on your board,
but it's common for chipsets to have some magic bit that makes the
region read-only.  So, I think you need to find that magic bit and set
it properly.

-Kevin

IDT issue

[Naresh G. Solanki]

As per the document

http://www.intel.com/content/www/us/en/intelligent-systems/queens-bay/atom-e...

Table 15 specifies about how to enable 0xE0000/0xF0000 segment.
As per that I have enabled the segment. Is that OK.

.

On Thu, Mar 19, 2015 at 7:12 PM, Kevin O'Connor  wrote:
> On Thu, Mar 19, 2015 at 06:59:19PM +0530, Naresh G. Solanki wrote:
> > Hi,
> >
> > With respect to the auto reset issue,
> >
> > I did detailed memory test on my board and found the following
> > 0xA0000 - 0xBFFFF & 0xE0000 - 0xFFFFF region is not writable and every
>
> byte
> > reads as 0xFF.
>
> 0xA0000-0xC0000 is the legacy vga range, it's not normally mapped to
> memory, and can not (in normal cicrcumstances) be used as memory.
>
> The 0xC0000-0x100000 region is the historic BIOS and option rom
> location.  It almost certainly can be used as memory on your board,
> but it's common for chipsets to have some magic bit that makes the
> region read-only.  So, I think you need to find that magic bit and set
> it properly.
>
> -Kevin