# RTCMemoryFixup

**Repository Path**: softxing/RTCMemoryFixup

## Basic Information

- **Project Name**: RTCMemoryFixup
- **Description**: https://github.com/acidanthera/RTCMemoryFixup
- **Primary Language**: Unknown
- **License**: BSD-3-Clause
- **Default Branch**: master
- **Homepage**: https://github.com/acidanthera/RTCMemoryFixup
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-01-05
- **Last Updated**: 2022-06-11

## Categories & Tags

**Categories**: Uncategorized

**Tags**: Kext

## README

RTCMemoryFixup
==============

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An open source kernel extension providing a way to emulate some offsets in CMOS (RTC) memory. It can help you to avoid some conflicts between macOS AppleRTC and firmware/BIOS of your PC.

It can also help you to find out at which offsets you have a conflict. In most cases it is enough to boot with some offsets in boot-args, perform sleep, wake and reboot. If you don't see any CMOS errors or some unexpected reboots, it means you have managed to exclude conflicted CMOS offsets.

Offsets in boot-args `rtcfx_exclude` can have value from 00 to FF (wihout prefix 0x). Be careful:

- Offsets from 0 to 0D usually are more or less 'compatible' and should not cause any conflicts.
- Offsets from 0x80 to 0xAB are used to store some hibernation information (IOHibernateRTCVariables). If any offset in this range causes a conflict, you can exclude it, but hibernation won't work.
- In my case it was only the one offset: B2. B0 - B4 offsets are used for PowerManagement features, but they don't work on hacks anyway)

#### Compilation
- This kext is not Lilu-plugin, but it still relies on some useful methods from Lilu libraries, so you have to put Lilu.kext into project folder.

#### Boot-args
- `rtcfx_exclude=offset1,offset2,start_offset-end_offset...` -  list of offsets or ranges of offsets where writing is not allowed
- `-rtcfxdbg` turns on debugging output

#### Credits
- [Apple](https://www.apple.com) for macOS  
- [vit9696](https://github.com/vit9696) for [Lilu.kext](https://github.com/vit9696/Lilu) and great help in implementing some features 
- [lvs1974](https://applelife.ru/members/lvs1974.53809/) for writing the software and maintaining it