How does Gigabyte's dual BIOS work?

[Vertigo]

Trying to understand how Gigabyte's dual BIOS feature works exactly.
As expected, the manual only explains the basics.

By default my board is in single BIOS mode at present. If I were to switch to dual BIOS mode then what image would be stored in the backup BIOS initially, anything at all?

When flashing a new BIOS, will this be stored in whichever BIOS is active at the time? Thinking about it that can't be the case as, if one BIOS became corrupted and thus you couldn't boot from it, you'd then never be able to re-flash it.

 

[Thekwango]

not sure if there's different implementations across different boards but on my x370 it's as follows;

2 x dip switches;

Switch 1: DB/SB = dual bios or single bios....in dual bios it will try whichever is set to primary bios and if that fails it tries secondary bios. in single bios it will boot loop on whatever is set as primary bios until it resets itself or you power it off.
Swithc 2: PB/SB = primary or secondary - your manual will indicate which is the default primary position.

 

[Vertigo]

Ah ok thanks. Yes I'm aware of the switches but not how they worked.

So, in dual-bios mode, the main/backup switch determines which it tries to boot first and it'll use the other if that fails?

Still don't understand how flashing works though.

Why are motherboard manufacturers so utterly useless with their documentation?