SeaBIOS - Basic

Background

• BIOS will enumerate all PCI devices in POST stage.
• The details about POST stage can be found here

Compile

• SeaBIOS is Kconfig style, so run make menuconfig
• Choose the options you want in the pop-up menu
• A new file ".config" will be generated after you exit the menu.
• Finally, Just make

To learn how to launch your first BIOS, please follow this

Q&A

1. How QEMU communicate with SeaBIOS?
A: fw_cfg:
• Emulated IO ports 0x510 (address) and 0x511 (data)
• Used to communicate various tables to the qemu BIOS (e820 map,ACPI tables, etc)
• Also provides support for exporting writable tables to the BIOS.
2. Where is option ROM?
A: /usr/share/qemu/