XP_DSDT – eXtract & Patch DSDT v0.4

About

XP_DSDT is a tool running on ‘win7’ that can eXtract the vanilla DSDT table from the registry and Patch it as required to run on HackOSx systems keeping the vanilla-BIOS. It was initially targeted at EeePCs netbooks based on the GMA950 graphics chip. Later, has also been successfully used on other laptops.

In essence it is:
1. a DSDT extractor; 2. a GUI to the iasl.exe compiler/decompiler; 3.  a simple DSDT patcher.

Credits are due to many net-contributors, specially: fassl, PentiumPC and many others.

I – Extract the DSDT table from the Registry (ACPI)  to a binary ‘DSDT.aml’ file

1. Using ‘regedit’ select the registry key containing the DSDT table and copy its name to the clipboard (right-click + ‘Copy Key Name’).

2. Paste the DSDT-key-name
(eg: “HKEY_LOCAL_MACHINE\HARDWARE\ACPI\DSDT\A1028\A1028000000000”)  as shown below:

3. Specify a name for the target DSDT.aml file and press button ‘GetDSDT’ to extract the DSDT table to a binary file ‘DSDT_BIOS2204.aml’ (specify the name beforehand!)

II – Decompile the binary DSDT.aml to  a source format  DSDT.dsl  (‘Patch’ tab)

4.  Press button ‘Decompile’

5 – Have a look at the Logger tab. Notice that the decompilation is carried out by the auxiliar Intel Compiler/decompiler console app (iasl.exe):

III – Run the DSDTPacher to apply selected fixes to the decompiled DSDT.dsl
(actually the vanila DSDT.dsl is preserved, the tool makes copies of it as the patching proceeds)

6.  Under point 2, in the ‘Patch’ tab, ‘Select fix options and Patch:’  you have a list of several fixes. Only 3 of them are optional. The others are only shown for reference (check ‘Show Tips’ for a brief explanation)

6.1 – Select the optional fixes you want to apply. For the EeePC1000H(E) I suggest to select ‘new HPET’ and ‘GMA950 Injection’ (no need for ‘BIOS CMOS Reset’). For other systems without GMA950, there’s no need for GMA950 injection,  but ‘BIOS CMOS Reset’ may be needed (eg. Dell 1564 needs it!). Try out different combinations.

6.2 – Press ‘Patch’ button.

6.3 – Have a look at the ‘patching’ log to see a list of the applied fixes:

IV – Recompile the patched-DSDT source file to re-create your fixed DSDT_BIOS2204_Fixed.aml

7.1 – Go back to the Patch tab and press Compile button

7.2 – Again, have a look at the Logger to check for possible compile errors/warnings. In case of error (if you ever get one) you may need to manually edit the ‘dsdt_fixed.txt’ file and recompile…

7.3 – LBNL,  you can always manually add any missing ‘fix’ to  ‘dsdt_fixed.txt’  (which already contains most of the mandatory fixes)  and recompile it using the ‘iasl.exe’.

Conclusion

This is a handy tool to generate/patch a DSDT for your EeePC HackOsX.
Hope you can make some use of it too as I have done.

TonyCr (AniV),  05May10

Download: XP_DSDTv0.4

Edit1: (14Feb13): Have updated the download link.
Edit2: (01May13): Yet another download link update.
Edit3: (01Apr16): Yet another download link update!