Note: Any flag can be added to your ist but these are just the common ones. Needs testing.Ĭpu=x = Number of physical cpu's installed NOT CORES.
#Iatkos l2 boot flags 64 Bit#
force64 = Force 64bit mode for AMD 64 bit cpu's. vmware = Force vmware support, with hacked kernels. Hopefully hardcoded front side bus speeds can be added to SMBIOS files at some point in the future by netkas or Mac.Nub. You would need to test with a benchmark app to see the gain.
#Iatkos l2 boot flags mac#
This may not change the FSB in about this mac on a hack, it did not for me.
I have not tested the fsb= flag but the -y gave me the correct 800fsb (100mhz x 8) and boosted my performance to where it should be in OSX. * You can easily add either the -y, -g, or -z options to your ist file or use the fsb= flag to give it an exact figure. z = For frequency's multiplied by 166 Mhz y = For frequency's multiplied by 133 Mhz g = For frequency's multiplied by 100 Mhz If you want different value, you have a few possibilities.Įx: fsb=800 or use one of these flags below: Do testing with the below values to see what works for you. These flags DO NOT work with any known vanilla kernel. Kernel name "mach_kernel" This flag simply tells the system to boot from another kernel available in / (aka root).įsb= Most of the hacked kernels include the possibility at boot to chosen FSB frequency. Pci=noacpi = Don't use ACPI to set up PCI interrupt routing.
The kernel tries to set a sensible default. Needs testing.ĭisable_8254_timer / enable_8254_timer = Enable interrupt 0 timer routing over the 8254 in addition to over Assuming you're using 64bit then you can try apicmaintimer or apicpmtimer. Sometimes there are timer routing problems on some Nvidia and ATI chipsets. Useful when your PIT timer is totally broken. Do APIC timer calibration using the pmtimer. Useful when this option was auto selected, but doesn't work.Īpicpmtimer=1 Either set to 0 or 1. Noapicmaintimer = Don't do time keeping using the APIC timer. This is useful when the PIT/HPET interrupts are unreliable. This can work around problems with incorrect timer initialization on some boards.Īpicmaintimer = Run time keeping from the local APIC timer instead of using the PIT/HPET interrupt for this. No_timer_check = Don't check the IO-APIC timer. Noapictimer = Don't set up the APIC timer Nolapic = Don't use the local APIC (alias for i386 compatibility) Default is 1Ģ: SIGBUS or log uncorrected errors, log corrected errorsģ: never panic or SIGBUS, log all errors (for testing only) Mce= tolerancelevel (number from list below)Ġ: always panic on uncorrected errors, log corrected errorsġ: panic or SIGBUS on uncorrected errors, log corrected errors. Mce=nobootlog = Disable boot machine check logging. On Intel systems it is enabled by default. If your BIOS does not do that it's a good idea to enable this log to make sure you log every machine check event that result in a reboot. Mce=bootlog = Enable logging of machine checks left over from booting.ĭisabled by default on AMD because some BIOS leave bogus logs. Once more info is gathered They will be categorized into the lists above This list needs extensive testing & feedback but most of these flags do work in OSX. This list is mostly AMD specific boot options & for 64bit CPU's.
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