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Windows XP/2000 Universal Driver SW600071 - Disabling Hardware Handshaking

NOTE: You can render your computer unusable if you do the wrong thing to the registry. If you are not familiar with editing the registry, you should follow these instructions precisely; better yet, you should find someone who is familiar with editing the registry.

Normally, touch will not function if any of the following serial signals are missing: TD (pin 3), DSR (Pin 6) or CTS (pin 8). Disabling handshaking, by adding a HardwareHandshake value to the Elo registry and setting it to zero, will allow touch to function if any of the above signals are missing. At a minimum, RD (pin 2) and ground (pin 5) must be connected. A reboot is required after adding the registry value.

To disable hardware handshaking:

• Click Start, click Run
• Enter regedt32 (note: no 'i'), then click OK
• Double-click HKEY_LOCAL_MACHINE
• Double-click SYSTEM
• Double-click CurrentControlSet
• Double-click Enum
• Double-click SERENUM
• Double-click ELOSERIAL
• Double-click the ID number for the monitor you want to affect (only one ID for single-monitor systems)
• Click Device Parameters
• From the list, click HardwareHandshaking
• Select Modify from the Edit menu (for Windows 2000 select DWORD from the Edit menu)
• Change Data in the DWORD Editor to a value of 0
• Close the registry and reboot the machine.