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68 lines
2.1 KiB
Markdown
68 lines
2.1 KiB
Markdown
# Fixing NVRAM: Manual
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* [Finding the ACPI path](#finding-the-acpi-path)
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* [Edits to the sample SSDT](#edits-to-the-sample-ssdt)
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* [Compiling the SSDT](#compiling-the-ssdt)
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* [Wrapping up](#wrapping-up)
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## Finding the ACPI path
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Finding the ACPI pathing is quite easy actually, first open your decompiled DSDT you got from [Dumping the DSDT](/Manual/dump.md) and [Decompiling and Compiling](/Manual/compile.md) with either MaciASL(if in macOS) or any other text editor if in Windows or Linux(VSCode has an [ACPI extension](https://marketplace.visualstudio.com/items?itemName=Thog.vscode-asl) that can also help).
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Next, search for the following:
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* Finding the LowPinCount path:
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* Search `Name (_ADR, 0x001F0000)`
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* Finding the PCI path:
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* Search `PNP0A08` (If multiple show up, use the first one)
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You should get something like the following show up:
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LPC Pathing | PCI Pathing
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:-------------------------:|:-------------------------:
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Now with the pathing, you can head here: [Edits to the sample SSDT](#edits-to-the-sample-ssdt)
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## Edits to the sample SSDT
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Now that we have our ACPI path, lets grab our SSDT and get to work:
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* [SSDT-PMC.dsl](https://github.com/acidanthera/OpenCorePkg/tree/master/Docs/AcpiSamples/Source/SSDT-PMC.dsl)
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By default, this uses `PCI0.LPCB` for the pathing. you'll want to rename accordingly.
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Following the example from above, we'll be renaming it to `PCI0.LPC`:
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**Before**:
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```
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External (_SB_.PCI0.LPCB, DeviceObj) <- Rename this
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Scope (_SB.PCI0.LPCB) <- Rename this
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```
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Following the example pathing we found, the SSDT should look something like this:
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**After**:
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```
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External (_SB_.PCI0.LPC, DeviceObj) <- Renamed
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Scope (_SB.PCI0.LPC) <- Renamed
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```
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## Compiling the SSDT
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With the SSDT done, you're now [ready to compile the SSDT!](/Manual/compile.md)
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## Wrapping up
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Once you're done making your SSDT, either head to the next page to finish the rest of the SSDTs or head here if you're ready to wrap up:
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* [**Cleanup**](/cleanup.md)
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