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

This article explains how to configure multiple touchmonitors driven by a video splitter (displaying the same video on each monitor) using the legacy Windows NT v3.1c touch driver from Elo — Now part of Zebra Technologies.

Registry Setup Instructions

1. Perform the driver installation for the total number of touch monitors connected (up to four). When the Finish prompt appears, select No, I will Restart my computer later.
2. Open the registry editor by running REGEDT32.

3. Navigate to the following registry path:

   HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Monmouse
4. Set the following keys to the stated values:
   • NumberOfScreens: [Enter the number of screens connected]
   • NumXScreens: 1
   • NumYScreens: 1

5. Next, navigate down to the specific touchscreen parameters path:

   \TouchScreen 0\Parameters
6. Set the following keys to the stated values:
   • XlateXLow: 0
   • XlateXHigh: 7fff
   • XlateYLow: 0
   • XlateYHigh: 7fff
7. Repeat steps 5 and 6 for all other screens connected to the splitter (e.g., TouchScreen 1, TouchScreen 2, etc.).
8. Close the registry editor and restart the computer.

Calibration Instructions

1. From Windows NT Explorer, navigate to the \winnt\system32 folder and double-click elocal32.exe.
2. Calibrate each screen individually as the calibration targets are displayed on the monitors.