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Note on the simulation:
As explained previously, this simulator does not exactly simulate the IT-2000 operations. Moreover,
some operations can not be simulated because of the difference between the IT-2000 and personal
computer in terms of the hardware.
Restrictions regarding the COM port
The operation of the COM port (8-pin) of the IT-2000 can be programmed in the same way as
for the COM1 port of the IBM PC/AT except the power control method. However, this post uses
an 8-pin DIN connector, which has a different shape from the COM port connector of the general
personal computers. Also, this connector is supplied a 5V power, which in turn provides power
to an external device such as an OBR. Consequently, although it is possible to develop, on a
personal computer, such a program that uses the COM port, it is not permitted to debug the
program while an external device such as the OBR is being connected to the port.
Restictions regarding the IrDA port
The IT-2000 has installed the hardware to support the IrDA interface, which is controlled by
the dedicated driver.
Many recent personal computers also support the IrDA interface, however, the driver for the
IT-2000 can not be operated on these personal computers because of the difference in the
hardware. The IrDA driver for the IT-2000 has been installed in a form of a COM driver
(COM2) of MS-Windows. Therefore, if the user develops an application program that uses the
COM2 port, it can be operated with the IrDA driver of the IT-2000. Note, in this case, that the
IrDA driver on the IT-2000 is a subset of the COM port driver of MS-Windows.