Toshiba TECRA S1 Maintenance Manual page 124

3 Diagnostic Programs
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Check whether COM port register could be correctly accessed and works
normally.
2. IRQ Check
Check the COM port's IRQ function.
Below is the parameter dialog window of the IRQ Check.
Parity: Choose the parity mode;
Stop Bit: Choose the stop bit;
Word Size: Choose the bit number in one word;
3. Internal Loop back
This test item is to check whether the COM port could correctly send and receive
data at different transferring rate through internal cycle system.
Below is the parameter dialog window.
Parity: Choose the parity mode;
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3.9 Communication
TECRA S1Maintenance Manual