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Member Since 27 Mar 2012
Offline Last Active Today, 07:43 PM

Topics I've Started

Asrock Boards with unlocked MSRs

13 June 2014 - 05:03 PM

Yesterday I got my new mainboard, an Asrock Fatal1ty B85 Killer. The first thing I did was upgrading the BIOS to the latest version available (V1.30). Next I wanted to patch it with PMpatch in order to unlock the MSRs but I was very surprised that PMpatch didn't found a match pattern in the power management module. This made me curious and I tried to boot Mavericks with the vanilla BIOS and it succeeded. No KP, no early reboot.


Obviously Asrock has decided to change their policy with regard to the CPU's MSRs in some of their latest BIOS releases for at least a few of their boards because I don't think that the Fatal1ty B85 Killer is the only board with unlocked MSRs. I wouldn't be surprised in case other members of their Fatal1ty series of mainboards are affected of this change of mind too. It would be great if anybody with access to one of these boards could confirm this.




I downloaded the BIOS files of the following boards from Asrock's website and tried to patch them with PMPatch but it didn't find a matching pattern in any of these BIOS files. It looks like all these boards have unlocked MSRs too. Well, it might also be the case that PMPatch lacks some matching patterns but you would need a board in order to verify this.

  • Asrock Fatal1ty H97 Killer (Version 1.10)
  • Asrock Fatal1ty Z97 Killer (Version 1.30)
  • Asrock Fatal1ty Z87 Killer (Version 1.40)


Driver for Realtek's RTL810x Fast Ethernet Series

18 February 2014 - 11:43 PM

Being asked to add support for Realtek's Fast Ethernet PCIe NICs to my RTL8111 driver I got tired of answering the same old question again and again so that I finally decided to write a separate driver for these chips and to make a few of you guys and gals happy. :)


As of now the driver supports the following members the RTL810X Fast Ethernet family:

  • RTL8101E
  • RTL8102E
  • RTL8103E
  • RTL8401E
  • RTL8105E
  • RTL8402
  • RTL8106E
  • RTL8106EUS

Here is a list of the driver's basic features:

  • Supports Mavericks, Mountain Lion and Lion.
  • 64 bit architecture only.
  • Support for multisegment packets relieving the network stack of unnecessary copy operations when assembling packets for transmission.
  • No-copy receive and transmit. Only small packets are copied on reception because creating a copy is more efficient than allocating a new buffer.
  • TCP, UDP and IPv4 checksum offload (receive and transmit).
  • TCP segmentation offload under IPv4.
  • Support for TCP/IPv6 and UDP/IPv6 checksum offload.
  • Supports Wake on LAN.
  • Support for Energy Efficient Ethernet (EEE) which can be disabled by setting enableEEE to NO in the drivers Info.plist without rebuild. The default is YES.
  • The driver is published under GPLv2.
  • Built using Xcode 4.6.3.


  • Version 1.0.0 (2014-05-24):
    • First offical release.
Before you install the driver you have to remove any installed driver for RTL810X.
  1. Goto /S/L/E and delete the old driver.
  2. Recreate the kernel cache.
  3. Open System Preferences and delete the corresponding network interface, e. g. en0. If you forget this step you might experience strange problems with certain Apple domains, iTunes and iCloud later.
  4. Install the new driver and recreate the kernel cache.
  5. Reboot
  6. Open System Preferences again, select Network and check if the new network interface has been created automatically or create it manually now.
  7. Configure the interface.
  • Make sure you have followed the installation instructions especially when you have issues with certain domains while the others are working fine.
  • In Terminal type "kextstat" or "grep RealtekRTL8100 /var/log/system.log" to verify that the driver loads.
  • Use the debug version to collect log data when trying to track down problems. The log messages can be found in /var/log/system.log. Include the log data when asking for support or giving feedback. I'm an engineer, not a clairvoyant.
  • Check your BIOS settings. You might want to disable Network Boot and the UEFI Network Stack as these can interfere with the driver.
  • Double check that you have removed any other Realtek kext from your system because they could prevent the driver from working properly.
  • Verify your bootloader configuration, in particular the kernel flags. Avoid using npci=0x2000 or npci=0x3000.
  • In Terminal run netstat -s in order to display network statistics. Carefully examine the data for any unusual activity like a high number of packets with bad IP header checksums, etc.
  • In case auto-configuration of the link layer connection doesn't work it might be necessary to select the medium manually in System Preferences under Network for the interface.
  • Use Wireshark to create a packet dump in order to collect diagnostic information.
  • Keep in mind that there are many manufacturers of network equipment. Although Ethernet is an IEEE standard different implementations may show different behavior causing incompatibilities. In case you are having trouble try a different switch or a different cable or disable EEE.


Getting the driver



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