User`s guide

Chapter 4 Using the Microcal Diagnostic Utility 81
If you choose Search All Ports, Microcal begins to scan all
communication ports (COM1 – COM7) and the mouse port trying to
find a touchscreen. For each communication port, Microcal searches
the various IRQs (interrupts requests), baud rates, and communication
settings (parity, data bits, and stop bits). Remember that you can press
Esc at any time to cancel the search for a touchscreen.
If you choose Exit, Microcal cancels the search and returns to the
DOS prompt.
Options When Running Microcal
By default, Microcal only searches COM1 and COM2 trying to find
the touchscreen. If the touchscreen is not found, Microcal displays
menu options that let you search all communication ports (1–7) and
the mouse port or just the mouse port. You need to run the search
again.
If you know your touchscreen is connected to COM3 through COM7,
you can specify the COM port when you enter the MICROCAL
command. For example:
MICROCAL /C4
In this case, Microcal searches only COM4 for the touchscreen
controller. Microcal still uses all valid combinations of IRQs (interrupt
requests), baud rates, and communication settings (parity, data bits,
and stop bits) when searching the specified port.
For more information on the options you can specify when running
Microcal, refer to “Specifying COM Port and Interrupt Settings” later
in this chapter.