The following command ran successfully on an eMachines 333cs. (I checked that my.rom was the same as the original ROM file flashed to the BIOS.)
flashrom -rV my.rom > flashrom.txt
The smolt URL for this machine is
http://www.smolts.org/client/show/pub_7982b3d7-a650-4770-8128-d385918bf9bd
The file flashrom.txt is attached.