There is no BIOS in the traditional sense.
The device uses U-Boot, and a custom one at that. Thats about the sum of what I know, more good info is avail here https://github.com/longsleep/u-boot-pine64 thanks to longsleep.
Bios was a function set for larger implementations. Keep in mind that SOC based platforms are usually designed for very specific and very code limited application when it comes to OS launching. That means that the BIOS wasnt needed. Good generic info on U-Boot is avail here http://www.denx.de/wiki/U-Boot/DesignPrinciples
The device uses U-Boot, and a custom one at that. Thats about the sum of what I know, more good info is avail here https://github.com/longsleep/u-boot-pine64 thanks to longsleep.
Bios was a function set for larger implementations. Keep in mind that SOC based platforms are usually designed for very specific and very code limited application when it comes to OS launching. That means that the BIOS wasnt needed. Good generic info on U-Boot is avail here http://www.denx.de/wiki/U-Boot/DesignPrinciples