• it appears the form factor of the computer inside follows the Open Pluggable System (OPS) standard
• This means it's possible the computer could be replaced plug-and-play by any OPS computer such as found on eBay
  • confirmed. Bought $85 16GB RAM 256GB SSD i7 11th gen Win10 home and everything including multitouch worked (except no sound). No driver issues in Device Manager
• The OPS plug must also support the multitouch in this model as there's nothing else plugged in except an ethernet plug and unplugging that did not break touch
• Unit shipped with i3 8G RAM
• At one point there was an SDK available but I can't seem to find it now.
• 1920×1080 resolution

SDK must be built under .NET framework 3.5. Updating the framework breaks the SDK

• this repo has the DLLs needed for the SDK
• needs VS 2017 (2022 will not work with .NET framework v3.5)
• Needs .NET framework 3.5 developer pack installed. Install via VS Installer:
  • in Visual Studio Community 2017 “cell” click on Modify
  • choose the individual components tab
  • choose .NET Framework 3.5 development tools
  • click modify

• The Open Pluggable Specification is on wikipedia and shows audio out on pins 69 and 70
• These pins were apparently left disconnected on the upgrade Boxlight unit I bought to replace the original i3 the 442i came with
• A primary source for OPS corroborates using pins 69 and 70 for audio out
• For the Boxlight unit I wired the audio out directly to these 2 pins to get the built-in audio of the table to work