I tried to flash the bios of an ASUS P5LD2-VM motherboard and it failed.
flashrom v0.9.1-r706
No coreboot table found.
Found chipset "Intel ICH7/ICH7R", enabling flash write... OK.
This chipset supports the following protocols: LPC,FWH.
Calibrating delay loop... OK.
Found chip "SST SST49LF004A/B" (512 KB, FWH) at physical address 0xfff80000.
Flash image seems to be a legacy BIOS. Disabling checks.
Writing flash chip... ERASE FAILED at 0x00002ee8! Expected=0xff, Read=0x50, failed byte count from 0x00000000-0x0000ffff: 0xd032
ERASE FAILED!
ERASE FAILED!
ERASE FAILED!
ERASE FAILED!
FAILED!
Your flash chip is in an unknown state.
------------------------------------------------------------
DO NOT REBOOT OR POWEROFF!
I've used this bios P5LD2-VM-ASUS-1303.ROM.