Board:asus/a8n sli

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This HOWTO explains how to use coreboot on the A8N-SLI board.


Device/functionality Status Comments
CPU works OK Tested: TODO
L1 cache enabled OK CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
L2 cache enabled OK CPU: L2 Cache: 512K (64 bytes/line)
L3 cache enabled N/A
Multiple CPU support N/A
Multi-core support Untested
Hardware virtualization N/A
DDR WIP See known Issues, only DIMMs A2_B2 or B2 will allow boot.
Dual channel support Untested
ECC support Untested
On-board Hardware
On-board IDE 3.5"
On-board IDE 2.5" N/A
On-board SATA WIP See known Issues, Only SATA port 3 is tested as working
On-board SCSI Unknown
On-board USB
On-board VGA N/A
On-board Ethernet
On-board Audio WIP This is being worked on.
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
On-board Wifi N/A
On-board Bluetooth N/A
On-board SD card reader N/A
Add-on slots/cards
ISA add-on cards N/A
Audio/Modem-Riser (AMR/CNR) cards N/A
PCI add-on cards No see known issues
Mini-PCI add-on cards N/A
Mini-PCI-Express add-on cards Unknown
PCI-X add-on cards N/A
AGP graphics cards N/A
PCI Express x1 add-on cards
PCI Express x2 add-on cards N/A
PCI Express x4 add-on cards Untested
PCI Express x8 add-on cards N/A
PCI Express x16 add-on cards WIP Will boot with a card in PCIEX16_1, if card outputs to screen is untested
PCI Express x32 add-on cards N/A
HTX add-on cards N/A
Legacy / Super I/O
Floppy WIP
Serial port 1 (COM1) OK
Serial port 2 (COM2) N/A
Parallel port
PS/2 keyboard
PS/2 mouse
Game port WIP
Infrared N/A
PC speaker
DiskOnChip N/A
Trackpoint N/A
Touchpad N/A
Fn Hotkeys N/A
Fingerprint Reader N/A
Docking VGA N/A
Docking LAN N/A
Docking USB N/A
Docking Audio N/A
Docking Displayport N/A
Thinklight N/A
Webcam N/A
Sensors / fan control
Hardware watchdog N/A
SMBus Unknown
CAN bus N/A
CPU frequency scaling No Needs (at least partial) ACPI support.
Other powersaving features N/A
ACPI No There's no ACPI implementation for this board.
Suspend Unknown
Nonstandard LEDs
High precision event timers (HPET)
Random number generator (RNG) N/A
Wake on modem ring Untested
Wake on LAN
Wake on keyboard Untested
Wake on mouse Untested
TPM Unknown
Flashrom OK

Building coreboot

Note: you can use the same target as for the ASUS A8N-E board. At the time of writing there's no specific target for the ASUS A8N-SLI Standard.

$ svn co svn://
$ cd coreboot-v2/targets
$ ./buildtarget asus/a8n_e
$ cd asus/a8n_e/asus_a8n_e

Now place your payload in this directory and name it payload.elf. Complete the build with:

$ make

The resulting coreboot.rom file (512 KB) can now be flashed using e.g. flashrom.

Known issues

  • The MAC address is stored in flash for almost all CK804/MCP55 boards. All of these boards flashed with coreboot probably have the same MAC address. See src/southbridge/nvidia/ck804/ and src/southbridge/nvidia/mcp55/ for details. On some of these boards, the MAC address is stored in a separate EEPROM, but you can't count on that.
  • halt -p / shutdown -P fails due to no acpi
  • possible issue if PCI card in PCI_1 causing hang
  • SATA ports 1 and 2 will not allow disk to be found SATA port 3 works and 4 is untested.


  • 512mb ram, DIMM A1 ( 1x512mb ) - Boots
  • 512mb ram, DIMM A2 ( 1x512mb ) - Hangs
  • 512mb ram, DIMM B1 ( 1x512mb ) - Hangs
  • 512mb ram, DIMM B2 ( 1x512mb ) - Hangs
  • 1gb ram, DIMMs A2_B2 ( 2x512mb ) - Boots
  • 1.5Gb Ram, DIMMS A2_B2_B1 (3x512Mb) - Hangs on Ram2.00
  • 1.5Gb Ram, DIMMS A2_B2_A1 (3x512Mb) - Hangs on Ram2.00
  • 1.5Gb Ram, DIMMS A2_B2_B1_A1 (4x512Mb) - Hangs on Ram2.00

If you can help out with this, please join the mailing list and let us know!

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