Oh my. Use of non-ISO8601 format in any form of computer code need to be sanctioned.
On Wed, May 22, 2019 at 9:50 AM Sam Eiderman <shmuel.eider...@oracle.com> wrote: > > > On 20 May 2019, at 5:28, Kevin O'Connor <ke...@koconnor.net> wrote: > > On Fri, May 17, 2019 at 11:57:23PM +0300, Sam Eiderman wrote: > > From: Liran Alon <liran.a...@oracle.com> > > Windows kernel extracts various BIOS information at boot-time. > The method it uses to extract SystemBiosDate is very hueristic. > It is done by nt!CmpGetBiosDate(). > > nt!CmpGetBiosDate() works by scanning all BIOS memory from 0xF0000 to > 0xFFFF5 (FSEG) in search for a string which is formatted like a date. > It then chooses the string which represents the most recent date, and > writes it to: > > HKLM/HARDWARE/DESCRIPTION/System SystemBiosDate > > This date should usually be BiosDate located at FSEG(0xFFF5). > > > FWIW, if you want to ensure a stable date is found, it's probably > simpler to force a valid date string to be present in the f-segment. > Something like: char win_bios_date[] VARFSEG = " 04/01/2014 "; > > As with my previous emails, I'd recommend using a hard-coded date (not > a build date) - as this tends to improve reproducibility. > > > The thing is, if the date reported by smbios tables is 05/02/2015 (which is > bigger than 04/01/2014) so: > > - If smbios tables are in fseg - Windows will select the most recent > date - 05/02/2015 > - If not - Windows will select the most recent date (the only one it > found) - 04/01/2014 > > > So 'char win_bios_date[] VARFSEG = " 04/01/2014 “‘ will not help. > > Sam > > > -Kevin > > > _______________________________________________ > SeaBIOS mailing list -- seabios@seabios.org > To unsubscribe send an email to seabios-le...@seabios.org > -- Tech III * AppControl * Endpoint Protection * Server Maintenance Buncombe County Schools Technology Department Network Group ComicSans Awareness Campaign <http://comicsanscriminal.com>
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