Psystar goes Open Source

pαuℓzurrr. · #1 11-18-2009, 09:29 AM

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Welcome to the PSYSTAR open source repository and project management system. Feel free to check out any of our open source projects, report bugs and if you can submit patches where appropriate. Bear in mind SVN access is read-only until you become a trusted developer. Initial patch submissions should be posted as unified diff's via the bug reporter.

New projects welcome! If you currently are the maintainer of an open source OS X project geared towards the x86 architecture and need hosting and/or a project management system we can help. Email osprojects <at> psystar.com with the details and a member of our team will get back to you with additional information. Please note we will not host any projects that use binary patching and/or replace existing extensions provided by Apple in its OS releases (this includes replacing newer extensions with older versions).

Currently the following projects are available,

Darwin Universal Boot Loader
DUBL is short for Darwin Universal Boot Loader. Originally based boot-132 from Apple. This software builds on prior open source and incorporates advanced graphics capabilities along with a few new features. In it current form it allows initialization of 10.6 (Snow Leopard) XNU kernels. Default boot architecture is i386 although K64 (native 64bit) can be achieved via arch=x86_64 boot option. Note when using K64, kernel extension compatibility may vary including Apple's own, hence our theory why they haven't brought K64 to the masses.

Null CPU Power Management
NullCPUPowerManagement is an XNU kernel extension for use with OS X to prevent a kernel panic caused by incorrectly configured HPET devices on generic x86 hardware. Note, this extension overrides the CPU power management functionality making the CPU run at full throttle all the time. This in turn gives better performance but reduces battery life on mobile units.

Elliott Force Legacy RTC
ElliottForceLegacyRTC is an extension that fixes ACPI issues which became problematic with 10.6 without patching/replacing the DSDT (prevent bios settings reset on Snow Leopard). Thank you Dave for coming up with this idea...patching sucks. Note, this extension does no detection and blatantly forces the RTC length to 2 bytes, which should be the correct value on x86 systems.

Open Halt Restart
OpenHaltRestart is a kernel module solution to a problem most generic x86 computers experience when restarting OS X. This module makes sure all cores are properly shutdown so that the system actually reboots instead of hitting the while(1) infinite loop in the restart function of the xnu kernel. Note this extension does not support K64 operation. Due to K64 strict KPI dependency requirements, we can't use symbols present in com.apple.kernel to retrieve the cpu count, fix should be straight forward in many ways....takers?

Realtek R1000
Realtek kernel extension for 8111(X) chip sets for 10.6.X. Note this extension does not support K64 operation. It will compile x86_64 and load but does not function correctly. Patches welcome.

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At the current time, this repository is limited to source only releases which require, at minimum, knowledge of the Xcode development environment to produce usable binaries. Not to worry, an automated build system is in the works and should be available in the coming days. This will allow you to test current releases without the need to compile anything!

Link: https://foundry.psystar.com/