This article explains how to replicate touchscreen video splitter in the Windows NT v3.1c driver

NOTE: Windows NT is no longer supported by Microsoft or Elo Touch Solutions.

Replicated Touchscreens (Video Splitter), Windows NT v3.1c Driver

To set up for multiple touchmonitors driven by a video splitter (same video on each monitor), perform the following:

• Do the installation for the number of  touch monitors connected (up to four). When the Finish button comes up, select "No, I will Restart my computer later".
• Run REGEDT32

• Set the following keys to the values stated:
  • NumberOfScreens: (number of screens connected)
  • NumXScreens: 1
  • NumYScreens: 1
• Drill down to:

• Set the following keys to the values stated:
  • XlateXLow: 0
  • XlateXHigh: 7fff
  • XlateYLow: 0
  • XlateYHigh: 7fff
• Repeat steps 4 and 5 for all other screens connected.
• Close the registry editor.
• Reboot the computer.
• IMPORTANT Run the calibration routine manually. NOTE: Calibration from the control panel will cause errors to be generated.
  • From NT Explorer, double-click elocal32.exe in the winnt\system32 folder.
  • Calibrate each screen as the calibration targets are displayed.