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8.5 Simulation Driver
The simulation driver is used to develop on a personal computer the application programs that run
on the IT-2000.
The application development libraries supported for this terminal control only the hardware that is
compatible with the IBM PC/AT. This is important to remember if the application programs for the
terminal are developed on a personal computer. Although each library is linked to the application
program to form an executable program, they do not contain code that is specific to the hardware of
the handy terminal. Consequently, if a simulation driver is used rather than one of the drivers
dependent on the terminal hardware, the application program can be made to run, without
modification, on the personal computer. This is the basic concept of simulation.
The diagram below shows the simulation environment that has been constructed on the personal
computer. By replacing SysCall.DLL with the simulator, there will not be any part which depends
on the IT-2000 hardware. This allows the simulation program to run on the personal computer
without having no software modification for application program.
Fig. 8.6
In the following chapters, System Library Simulator (SysCall.DLL) is explained in detail.
SysCall.DLL (Simulator)
LibSYSW.LIB
Application Program
LibOBRW.LIB
PADCTRL.VBX
Std. Mouse Drv.
OBRLIB.DLL
LibYMOD.LIB
YMODEM.DL
Mouse Event
LibSYSW.LIB
MS-Windows
AT Architecture
Std. VGA Drv.
Display Req.
FLINK.DLL
Std. COM Drv.
LibYMOD.LIB