VIA EPIA-CN

This page describes how to use coreboot on the VIA EPIA-CN mainboard.

This page is a work in progress.

VIA EPIA CN13000G
VIA EPIA CN10000EG

The earlier versions of the Epia-CN use a Winbond Super I/O vs the VIA in the later versions.

Until a few patches get fixed, please use coreboot rev 3556 and FILO rev 52 for good build success on any C7+CN700+vt8237 board.

Status

Device/functionality	Status	Comments
CPU
CPU works	OK
L1 cache enabled	OK	Always on
L2 cache enabled	OK	Always on
L3 cache enabled	N/A
Multiple CPU support	N/A
Multi-core support	N/A
Hardware virtualization	N/A
RAM
EDO	N/A
SDRAM	N/A
SO-DIMM	N/A
DDR	N/A
DDR2	OK
DDR3	N/A
Dual channel support	N/A
ECC support	N/A
On-board Hardware
On-board IDE 3.5"	OK
On-board IDE 2.5"	OK
On-board SATA	OK
On-board SCSI	Unknown
On-board USB	OK	UHCI and EHCI
On-board VGA	OK	Openchrome works without vgabios or bochs
On-board ethernet	OK
On-board audio	OK
On-board modem	N/A
On-board FireWire	N/A
On-board smartcard reader	N/A
On-board CompactFlash	N/A
On-board PCMCIA	N/A
Add-on slots/cards
ISA add-on cards	N/A
Audio/Modem-Riser (AMR/CNR) cards	N/A
PCI add-on cards	OK
Mini-PCI add-on cards	Unknown
PCI-X add-on cards	Unknown
AGP graphics cards	N/A
PCI Express x1 add-on cards	N/A
PCI Express x2 add-on cards	N/A
PCI Express x4 add-on cards	N/A
PCI Express x8 add-on cards	N/A
PCI Express x16 add-on cards	N/A
PCI Express x32 add-on cards	N/A
HTX add-on cards	N/A
Legacy / Super I/O
Floppy	N/A
Serial port 1 (COM1)	OK
Serial port 2 (COM2)	Not tested
Parallel port	Not tested
PS/2 keyboard	OK
PS/2 mouse	OK
Game port	N/A
Infrared	Not tested
PC speaker	OK
DiskOnChip	NA
Miscellaneous
Sensors / fan control	Not tested
Hardware watchdog	OK
SMBus	Unknown
CAN bus	N/A
CPU frequency scaling	OK
Other powersaving features	N/A
ACPI	Not Yet
Reboot	OK
Poweroff
Suspend	Unknown
Nonstandard LEDs	OK
High precision event timers (HPET)	Not tested
Random number generator (RNG)	N/A
Wake on modem ring	N/A
Wake on LAN	Untested
Wake on keyboard	Untested
Wake on mouse	Untested
Flashrom	OK	SST 512KB + 1MB, PMC 512KB, 2MB not yet

VIA vgabios currently does some very strange things to clobber USB and Networking. Ubuntu 8.04 unichrome drivers support X without the need for bochs or vgabios. viafb support as a payload is in the works.

See also

• http://www.coreboot.org/pipermail/coreboot/2008-February/030101.html (old status post)
• http://www.coreboot.org/pipermail/coreboot/2008-May/034736.html (new patch which got committed later)

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