ACPI Tables

Surface RT ACPI Tables.

ACPI Tables

• APIC - Advanced Programmable Interrupt Controller

• BGRT - Boot Graphics Resource Table

• DBG2 - Debug Port Table 2

• CSRT - Core System Resource Table

• DSDT - Differentiated System Description Table

• FACP - Fixed ACPI Description Table

• FPDT - Firmware Performance Data Table

• MSDM - Microsoft Data Management table

• RSDP - Root System Description Pointer

• SSDT - Secondary System Description Table

• TPM2 - Trusted Platform Module 2.0

• WDSA - Windows Specific Table. Contains tCover information

• XSDT - Extended System Description Table Fields

17KB

ACPI-Tables-SurfaceRT.zip

archive

Open

41KB

ACPI-Tables-SurfaceRT-decompiled.zip

archive

Open

Get ACPI-Tables from Surface RT

You need to be able to run unsigned EFI apps. get ShellBinPkg.zip from https://github.com/tianocore/edk2/releases/tag/edk2-stable201911 And use the startup script below. Dumped tables should be in the dump folder

564B

startup.nsh

Open

Decompile ACPI-Tables

To decompile ACPI on Linux you would normally use IASL. But all Tables are compiled with the Microsoft ASL compiler. Since MS_ASL isn't as strict as IASL, IASL detects some errors and won't decompile all tables.

IASL

Decompile with IASL

iasl -da APIC0000.bin BGRT0000.bin CSRT0000.bin  DBG20000.bin  FACP0000.bin  FPDT0000.bin  MSDM0000.bin TPM20000.bin XSDT0000.bin

MS ASL

https://docs.microsoft.com/en-us/windows-hardware/drivers/bringup/microsoft-asl-compiler

155KB

microsoft_asl.exe

Open

Decompile with MS_ASL

wine microsoft_asl.exe /u /e DSDT0000.bin
wine microsoft_asl.exe /u /e SSDT0000.bin 
wine microsoft_asl.exe /u /e SSDT0001.bin
wine microsoft_asl.exe /u /e WDSA0000.bin

You can't decompile RSDP0000.bin but it only contains 2 Pointers