View source for ASUS M4A78LT-M

== Status ==
{{Status|

|CPU_status = OK
|CPU_comments = Tested: AMD Athlon II X2 245e.
|CPU_L1_status = Untested
|CPU_L1_comments = Not tested yet
|CPU_L2_status = Untested
|CPU_L2_comments = Not tested yet
|CPU_L3_status = N/A
|CPU_multiple_status = N/A
|CPU_multicore_status = OK
|CPU_virt_status = Untested
|CPU_virt_comments = Not tested yet

|RAM_EDO_status = N/A
|RAM_SDRAM_status = N/A
|RAM_SODIMM_status = N/A
|RAM_DDR_status = N/A
|RAM_DDR_comments =
|RAM_DDR2_status = N/A
|RAM_DDR3_status = OK
|RAM_DDR3_comments = 2G works, see also [[#Known issues]].
|RAM_dualchannel_status = Untested
|RAM_ecc_status = Untested
|RAM_ecc_comments = 

|IDE_status = Untested
|IDE_comments =
|IDE_25_status = N/A
|IDE_CF_status = Untested 
|IDE_CF_comments = 
|CDROM_DVD_status = -
|CDROM_DVD_comments = 
|SATA_status = OK
|SATA_comments = Tested on port 1, untested for the rest
|USB_status = OK
|USB_comments = Untested
|Onboard_VGA_status = Untested
|Onboard_VGA_comments =
|Onboard_ethernet_status = Untested
|Onboard_audio_status = No
|Onboard_audio_comments = Linux driver crashes / Kernel panic. See also [[#Known issues]].
|Onboard_modem_status = N/A
|Onboard_firewire_status = N/A
|Smartcard_status = N/A
|Onboard_CF_status = N/A
|Onboard_PCMCIA_status = N/A

|ISA_cards_status = N/A
|AMR_cards_status = N/A
|PCI_cards_status = Untested
|Mini_PCI_cards_status = N/A
|PCIX_cards_status = N/A
|AGP_cards_status = N/A
|PCIE_x1_status = Untested
|PCIE_x1_comments = 
|PCIE_x2_status = N/A
|PCIE_x4_status = N/A
|PCIE_x8_status = N/A
|PCIE_x16_status = Untested
|PCIE_x16_comments = 
|PCIE_x32_status = N/A
|HTX_status = N/A

|Floppy_status = N/A
|Floppy_comments =
|COM1_status = OK
|COM1_comments = COM1 is only pin header on board. DB-9 serial connector is available, but not included with board.
|COM2_status = N/A
|PP_status = Untested
|PP_comments =
|PS2_keyboard_status = Untested
|PS2_keyboard_comments = 
|PS2_mouse_status = N/A
|PS2_mouse_comments = 
|Game_port_status = N/A
|IR_status = N/A
|Speaker_status = Untested
|DiskOnChip_status = N/A

|Sensors_status = Untested
|Sensors_comments = 
|Watchdog_status = N/A
|CAN_bus_status = N/A
|CPUfreq_status = Untested
|CPUfreq_comments = 
|Powersave_status = Untested
|ACPI_status = Untested
|Reboot_status = Untested
|Poweroff_status = Untested
|LEDs_status = Untested
|LEDs_comments = 
|HPET_status = Untested
|HPET_comments = 
|RNG_status = Untested
|WakeOnModem_status = Untested
|WakeOnLAN_status =  Untested
|WakeOnKeyboard_status = Untested
|WakeOnMouse_status = Untested
|Flashrom_status = OK
|Flashrom_comments = The chip is SPI

}}

== Introduction ==
This pages is about the port to the M4A78LT-M, this mainboard is very similar to the M4A785-M, but:
* it has DDR3 instead of DDR2


== Building Coreboot ==
To build coreboot:
* Apply that diff:
 diff --git a/src/mainboard/asus/m4a785-m/Kconfig b/src/mainboard/asus/m4a785-m/Kconfig
 index 84cc06c..25b3345 100644
 --- a/src/mainboard/asus/m4a785-m/Kconfig
 +++ b/src/mainboard/asus/m4a785-m/Kconfig
 @@ -4,7 +4,8 @@ config BOARD_SPECIFIC_OPTIONS # dummy
         def_bool y
         select ARCH_X86
         select CPU_AMD_SOCKET_AM3
 -       select DIMM_DDR2
 +       select DIMM_DDR3
 +       select DIMM_REGISTERED
         select NORTHBRIDGE_AMD_AMDFAM10
         select SOUTHBRIDGE_AMD_RS780
         select SOUTHBRIDGE_AMD_SB700
* select expert in make menuconfig and remove the microcode loading
* make


== Known issues ==
* microcode update through coreboot leads into a freeze [http://www.coreboot.org/pipermail/coreboot/2011-December/067721.html see also]
* snd-hda-intel causes a [http://www.coreboot.org/pipermail/coreboot/2011-December/067733.html Kernel panic], blacklist it
* The PCIe graphics card will be ignored completely, so not even listed by lspci [http://www.coreboot.org/pipermail/coreboot/2011-December/067733.html see also]
* A G.Skill 2G RAM Stick ([http://www.gskill.com/products.php?index=223 F3-10666CL7D-4GBRH]) didn't work while the [http://www.gskill.com/products.php?index=243 F3-12800CL7D-4GBRM] works fine, [http://www.coreboot.org/pipermail/coreboot/2011-December/067721.html see also]
* The P-State (Performance State) table isn't complete compared to the vendor BIOS [http://www.coreboot.org/pipermail/coreboot/2011-December/067733.html see also]