Hi,
this is just to report that I succeeded reading the BIOS using FlashROM 0.9.0 from my VIA EPIA EN12000EG motherboard. I haven't tried writing the BIOS yet. The only small issue I had was that my motherboard is reported to be from the "CN" rather than the "EN" series:
Calibrating delay loop... OK. No coreboot table found. Found chipset "VIA VT8237", enabling flash write... OK. Found board "VIA EPIA-CN", enabling flash write... OK. Found chip "SST SST49LF004A/B" (512 KB) at physical address 0xfff80000. Reading flash... done.
I don't know if it's even technically possible to distinguish the CN and EN series, or if they are simply too close / almost identical from a chipset etc. view, but I'd be happy to help out improving this, if I can.