Picking a flash device with a boot block that cannot be rewritten just via any possible software routine alone and only by being combined with hardware intervention will work.
The parts that require a higher programming voltage that Richard mentions is one good possible way. This would also recover a damaged BIOS attacked by even phishers. If the flash update was somehow corrupted via power interruption, infected BIOS update with a good checksum, etc. the boot section would still have an good booter. -Bari Richard Smith wrote: >> >>I think that having a 'you can never write this' bios image would be >>useful. The power fail scenario is a concern. >> > > > Many flash parts support a hardware lock where you can set a split. > Areas that have been hardware locked can only be reprogrammed via the > right programming voltage which is normally much higher than Vcc. > > -- > Richard A. Smith -- linuxbios mailing list [email protected] http://www.openbios.org/mailman/listinfo/linuxbios
