There is no dedicated software or manufacturer driver for the eMachines KB-0705 keyboard

The good news is that you do not actually need a specific driver to make it work. The Plug-and-Play Reality

was a staple pack-in for budget-friendly eMachines desktop towers. It was a standard, rugged membrane keyboard—nothing fancy, just white or silver plastic with a reliable PS/2 or USB connection. The Problem: A Windows Native in a Mac World

Conclusion

References and further reading

  • Apple Developer docs: USB and HID device handling (searchable).
  • Karabiner-Elements documentation.
  • Hammerspoon and BetterTouchTool documentation.