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8. Application Development
8.1 Overview
This terminal uses the IBM PC/AT architecture. Though the actual display size is 192 (H) x 384 (V)
pixels, internally the area of 640 (H) x 480 (V) pixels is supported by the dedicated display driver.
It allows no limitation on programming. Therefore, if the user develops an application that makes
use of the upper left side (192 (H) x 384 (V)) as display area, a dedicated application program will
run on this terminal. It is possible to have coding also by using GetSystemMetrics of Windows API
which can not be affected by the operating environment. Also, since the numeric keys of the IT-2000
generate the same keycodes as the IBM PC/AT machine, there is no need to discriminate between
this terminal and the development machine in terms of the standard input/output operations.
In the IT-2000, a dedicated mouse driver has been installed to support the touch panel. Application
program can acquire the tapping on the touch panel as it is clicked by the button on the left side of
mouse. However, there is one limitation which does not allow the double-clicking (or double tapping
on the touch panel). The reason is that it is not possible for the user to tap twice on the same narrow
point. Therefore, a programmer must design such application program so that it can accept only
input by single tapping on the panel.
Applications that use the COM1 port (8-pin) can be programmed in the same way they are for
MS-Windows programming except that they must include the power control functions. On this
terminal, the power to the COM port is default-set to off so that the power consumption is reduced
to a minimum. Therefore, application programs that use the COM port must turn on the power to the
COM port in advance using the system library.