ASUS P8Z77-V
This page describes how to run coreboot on the ASUS P8Z77-V.
Flashing coreboot
+---------------------+----------------+ | Type | Value | +=====================+================+ | Socketed flash | yes | +---------------------+----------------+ | Model | W25Q64FVA1Q | +---------------------+----------------+ | Size | 8 MiB | +---------------------+----------------+ | Package | DIP-8 | +---------------------+----------------+ | Write protection | yes | +---------------------+----------------+ | Dual BIOS feature | no | +---------------------+----------------+ | Internal flashing | no | +---------------------+----------------+
The flash IC is located between the black and white PCI Express x16 slots (circled): 
How to flash
The main SPI flash cannot be written because the vendor firmware disables BIOSWE and enables BLE/SMM_BWP flags in BIOS_CNTL for their latest BIOSes. An external programmer is required. You must flash standalone, flashing in-circuit doesn‘t work. The flash chip is socketed, so it’s easy to remove and reflash.
Working
- PS/2 keyboard with SeaBIOS 1.14.0 and Debian GNU/Linux with kernel 5.10.28
- Integrated Ethernet NIC
- S3 Suspend to RAM
- USB2 on rear and front panel connectors
- USB3 (Z77‘s and ASMedia’s works)
- Integrated SATA of Z77
- Integrated SATA of ASM1061 (works under GNU/Linux but not under SeaBIOS)
- CPU Temp sensors (tested PSensor on GNU/Linux)
- TPM on TPM-header (tested tpm-tools with TPM 1.2 Infineon SLB9635TT12)
- Native raminit
- Integrated graphics with libgfxinit (VGA/DVI-D/HDMI tested and working)
- PCIe in PCIe-16x/8x slots (tested using an S3 Matrix GPU)
- Debug output from serial port
- Atheros AR9485 half-height mini PCIe WNIC adapted with Wi-Fi Go! Adapter
- Default PCIe config (PCIEX_16_3 as 1x, PCIe Port 4 to ASM1061 SATA, see below for other potential options)
Untested
- EHCI debugging
- S/PDIF audio
- PS/2 mouse
Not working
- PCIEX_1_2 (expected under default PCIe config)
- Other PCIe configs (see below)
PCIe config
On Asus vendor firmware, other than the default config already supported here, there remain another two configs: “PCIEX_16_3 as x4, with PCIEX_1_1, PCIEX_1_2 and onboard ASM1061 disabled” and “PCIEX_16_3 as x1, but PCIe Port 4 to PCIEX_1_2, with onboard ASM1061 disabled”.
Configuring PCIEX_16_3 as x4 needs to program 0x3 to the LSB of PCHSTRP9, but also needs to configure GPIOs in the Super I/O chip different than the default config in this board's override tree.
Configuring PCIe Port 4 to PCIEX_1_2 needs to configure GPIOs in the Super I/O chip differently than the default config.
I have tried a lot, but sadly I am unable to produce the same result as the vendor firmware.
Asus Wi-Fi Go!
Asus Wi-Fi Go! has several versions. P8Z77-V has the earliest version. See Asus Wi-Fi Go! v1.
Technology
+------------------+--------------------------------------------------+ | Northbridge | :doc:`../../northbridge/intel/sandybridge/index` | +------------------+--------------------------------------------------+ | Southbridge | bd82x6x | +------------------+--------------------------------------------------+ | CPU | model_206ax | +------------------+--------------------------------------------------+ | Super I/O | Nuvoton NCT6779D | +------------------+--------------------------------------------------+ | EC | None | +------------------+--------------------------------------------------+ | Coprocessor | Intel Management Engine | +------------------+--------------------------------------------------+