View source for Board:asrock/939a785gmh

[http://www.asrock.com/mb/overview.asp?Model=939A785GMH/128M&s=939 Official site]

== Hardware details ==

=== Clock Chip ===

The clock chip is ICS 9LPRS485CGLF - Could be used for overclocking.

=== Sideport memory ===

It uses Elixir n2tu1g16dg-ac, DDR2 800 Mhz.

=== SuperIO ===

It uses Winbond W83627DHG. Its GPIOs are connected this way: 

GP20 - sideport voltage 1 = 1.82V 0 = 1.92V

GPO40 | GPO41 | GPIO23 GPU voltage - 000 - 1.45V step 0.05 -- 111 - 1.10V

GPO35 - loadline control (0 enabled)

GPO44 | GPO45  | GPO46 - DDR memory voltage

Suspend LED is the power LED - register 0f3 in SIO. Low = on

=== PCIe x16 ===

Reset signal is through GPIO - GPM8,GPM9, 0 asserts reset, 1 de-asserts reset.

== Status ==
For the entries marked as WIP, please see below.

{{Status|

|CPU_status = OK
|CPU_comments = AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
|CPU_multiple_status = N/A
|CPU_multicore_status = OK
|CPU_multicore_comments = AMD Athlon(tm) 64 X2 Dual Core Processor 3800+: htop and /proc/cpuinfo

|RAM_EDO_status = N/A
|RAM_SDRAM_status = N/A
|RAM_SODIMM_status = N/A
|RAM_DDR_status = WIP
|RAM_DDR2_status = N/A
|RAM_DDR3_status = N/A
|RAM_ecc_status = N/A
|RAM_dualchannel_status = OK

|IDE_status = OK
|IDE_comments = checked with a CD-ROM drive
|IDE_25_status = N/A
|SATA_status = OK (check note)
|Onboard_SCSI_status = N/A
|USB_status = OK
|USB_comments = only checked two ports so far, for mouse and keyboard.
|Onboard_VGA_status = WIP
|Onboard_ethernet_status = OK
|Onboard_audio_status = WIP
|Onboard_audio_comments = Front works, Surround doesn't
|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 = OK
|Mini_PCI_cards_status = N/A
|PCIX_cards_status = N/A
|AGP_cards_status = N/A
|PCIE_x1_status = OK
|PCIE_x2_status = N/A
|PCIE_x4_status = N/A
|PCIE_x8_status = N/A
|PCIE_x16_status = OK
|PCIE_x32_status = N/A
|HTX_status = N/A

|COM2_status = N/A
|Game_port_status = N/A
|DiskOnChip_status = N/A

|CAN_bus_status = N/A
|Reboot_status = OK
|Poweroff_status = OK
|LEDs_status = N/A
|RNG_status = N/A
|Flashrom_status = OK
}}

== Known Issues ==

=== SATA ===

External and SATA port 4 is not detected. This is due to bug in Coreboot code with regards of Combined mode handling.

=== RAM ===

==== Ruik tests ====

* use 2x 512MB  CAS 2.5 DDR400 
* blue slots populated = dualchannel mode (works)
* all slots populated (with additional RAM) - strange UMA artefacts
* only channel0 populated (DDR1 and DDR3 slot, DDR1 is closest to CPU) - strange UMA artefacts
* single memory stick in DDR1 slot - works

==== Lennart tests ====

* blue slots populated - works
* all slots populated -- doesn't boot
** hangs on "Clearing initial memory region:"
* only channel0 populated - doesn't boot
** hangs on "Clearing initial memory region:"
* single DIMM in DDR1 - works.

=== Onboard VGA ===
* In regard to the vendor BIOS the output numbers were switched. DVI-0 (vendor BIOS) was named HDMI-0 using coreboot.
* Both VGA and DVI output worked.

=== PCI-E graphics adapter ===
* Should be now fixed - r6384


=== Keyboard in Grub ===
* The (USB) keyboard in Grub doesn't respond correctly. Every keypress triggers multiple actions.

=== Kernel ===
* Linux 2.6.35.2 wouldn't boot. It would start, then the screens were going blank and the machine hung.