AskDavis/Getting-Started-With-ACPI
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Massive overhaul(hopefully helps new users a bti)

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Mykola Grymalyuk
2020-05-30 23:54:37 -06:00
parent 1f776dfb8c
commit 0c2d4b492d
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Universal/smbus.md
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# Fixing SMBus support
# Fixing SMBus support (SSDT-SBUS-MCHC)
* [What this SSDT does](#what-this-ssdt-does)
* [Methods to make this SSDT](#methods-to-make-this-ssdt)
## What this SSDT does
This section of the guide refers to fixing AppleSMBus support in macOS, what is AppleSMBus? Well this mainly handles the System Management Bus, which has many functions like:
@@ -12,65 +17,8 @@ This section of the guide refers to fixing AppleSMBus support in macOS, what is
For install purposes, this SSDT isn't needed but for post-install it's recommended to put the final touches on your hack.
So to get started, we'll want to grab our SMBus SSDT:
## Methods to make this SSDT
* [SSDT-SBUS-MCHC.dsl](https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/AcpiSamples/SSDT-SBUS-MCHC.dsl)
To make this SSDT, you only got 1 method: Doing it manually
So the important parts we care about are:
```text
External (_SB_.PCI0, DeviceObj) <- Rename this
External (_SB_.PCI0.SBUS.BUS0, DeviceObj) <- Rename this
Scope (_SB.PCI0) <- Rename this
{
Device (MCHC)
{
Name (_ADR, Zero) // _ADR: Address
}
}
Device (_SB.PCI0.SBUS.BUS0) <- Rename this
```
To find the correct pathing for your devices, grab [Hackintool](https://www.tonymacx86.com/threads/release-hackintool-v3-x-x.254559/) ([Github link](https://github.com/headkaze/Hackintool)) and head to the PCI tab:
![](/images/Universal/smbus-md/pci.png)
Look for the SMBus device under Subclass, then look beside and you'll see the ACPI path(under IOReg Name). To convert , omit `@...`
* `/PC00@0/SMBS@1F,4` -> `PC00.SMBS`
Once finished, it'll look something like this:
```text
External (_SB_.PC00, DeviceObj) <- Renamed
External (_SB_.PC00.SMBS.BUS0, DeviceObj) <- Renamed
Scope (_SB.PC00)
{
Device (MCHC)
{
Name (_ADR, Zero) // _ADR: Address
}
}
Device (_SB.PC00.SMBS.BUS0) <- Renamed
```
![](/images/Universal/smbus-md/smbus.png)
For those having issues, you can also check Device Manager -> CPU -> BIOS device Name
**Note**: The MCHC is actually the DRAM controller, similar idea to SMBus for fixing memory reporting
## [Now you're ready to compile the SSDT!](/Manual/compile.md)
## Verify it's working
To check if the SSDT is working correctly, run the following in terminal:
```
kextstat | grep -E "AppleSMBusController|AppleSMBusPCI"
```
![](/images/Universal/smbus-md/verify.png)
* [Manual](/Universal/smbus-methods/manual.md)