With the last patch from Nick Barker, after booting I only see on the serial console:

LinuxBIOS-1.1.8.0Fallback Sat Oct 29 13:55:37 CEST 2005 starting...

Enabling mainboard devices

I have solved this issue by changing enable_mainboard_devices function in src/mainboard/via/epia-m/auto.c . I have modified the 2th pci_write_config

line from :

pci_write_config8(dev, 0x51, 0x10);

to

pci_write_config8(dev, 0x51, 0x1f);

With this modification, the epia-m system is booting and I can use it.

Regards