https://github.com/pgkt04/tp2-driver-reversal

Windows drivers firmware findings for Thinkpad Trackpoint Keyboard II
https://github.com/pgkt04/tp2-driver-reversal

Last synced: about 2 months ago
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Windows drivers firmware findings for Thinkpad Trackpoint Keyboard II

• Host: GitHub
• URL: https://github.com/pgkt04/tp2-driver-reversal
• Owner: pgkt04
• Created: 2024-09-11T10:23:09.000Z (4 months ago)
• Default Branch: main
• Last Pushed: 2024-09-11T10:56:12.000Z (4 months ago)
• Last Synced: 2024-09-11T16:03:30.721Z (4 months ago)
• Language: C
• Homepage:
• Size: 12.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# tp2-driver-reversal

Windows drivers firmware findings for Thinkpad Trackpoint Keyboard II.  

You can find the official software being looked at here: [https://support.lenovo.com/au/en/accessories/trackpoint_keyboard](https://support.lenovo.com/au/en/accessories/trackpoint_keyboard)

  

this isn't a remake/rebuild of the firmware, just some findings so I can hack together some improvements for the keyboard on macos in the future

## findings

### scrolling

scrolling related functionality can be found within the logonset files.  

it looks like its mostly a wrapper around the hid interface sending these bytes:

```c

var_14 = 0;

memset(var_1C, 0, sizeof(var_1C));

var_1C[0] = 0x18;   // Set lower byte

var_1C[1] = 0x09;   // Set higher byte

var_1C[2] = input_char;  // Set input character into third byte

OutputToDevice(0x17EF, 0x60E1, 0xFF01, var_1C); // vendor id, product id probably, ... buffer(var_1c)

```

and

```c

var_8 = 0;

memset(var_10, 0, sizeof(var_10));

var_10[0] = 0x13;   // Set lower byte

var_10[1] = 0x09;   // Set higher byte

var_10[2] = input_char;  // Set input character into third byte

SetKbdFeatures(0x17EF, 0x60EE, 0x0C, var_10); // vendor id, product ..., buffer(var_10)

```

it also has other helpers working in conjunction with `HScrollFun.exe` to create the "Preferred Scrolling" feature