[coreboot] Upgrading SPI ROM chip?

[Juhana Helovuo]

Hello All,

How does a chipset know the size of the SPI BIOS ROM on board? I am 
thinking specifically the AMD RS780+SB7x0 chipset.

It could be that the chipset reads the SPI ROM size from the ROM chip 
itself at boot. In such case it should be possible to upgrade a 1 MByte 
chip to 2M or 4M just by plugging in another chip. Has anyone tried this?

Best regards,
Juhana Helovuo