Lately I have tried
flashrom -p internal:laptop=force_I_want_a_brick
on my Fujitsu Siemens Amilo Xi 3650 laptop and it has worked quite well.
Found chipset "Intel ICH9M-E".
Found Winbond flash chip "W25X16" (2048 kB, SPI) at physical address
BIOS (according to dmidecode) is
Release Date: 04/15/2010
I would love to see it under 'supported boards' in the future.
More information can be found in the attachements.