User`s guide

TouchWare for Windows NT User's Guide38
touchscreen controller, which in turn sends signals to the touchscreen
driver through the COM port.
The options in the Hardware Controls dialog box control the hardware
settings of the COM port through which the touchscreen driver
communicates with the touchscreen controller. You usually do not
need to change these settings. You may have occasion to change the
settings, for example if you move the touchscreen controller to a
different COM port or if you add a new device that uses the same IRQ
or address as the touchscreen controller. If you are using a TouchPen
controller, you may want to adjust the baud rate for the COM port
through which the touchscreen driver communicates with the
controller.
Setting the Communication Port
Use the COM port radio buttons to select the serial communication
port for the touchscreen controller and touchscreen. The touchscreen
controller can work in any COM port configuration. In most cases,
the touchscreen controller is connected to a standard COM1–COM4
port.
When selecting a COM port, keep the following issues in mind:
COM1 is usually paired with IRQ4. COM2 is usually paired
with IRQ3. The IRQ values are automatically assigned by the
system when you choose a COM port.
A mouse usually uses COM1 and IRQ4. If you also have a mouse
installed on your system, make sure you do not specify the same
COM port and IRQ for the touchscreen controller and
touchscreen.
If you installed the MicroTouch PC Bus touchscreen controller,
remember that you used the jumpers to set the port and interrupt.
The default settings on the PC Bus controller are COM3 and
IRQ4. Be sure the information in the Hardware Controls dialog
box matches the settings you defined on the controller.