Casio IT-2000W - Manual (Page 158)

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8.6.2 System Library
Overview
The IT-2000 has various dedicated functions that can control the backlight and the power of various
devices by software. These functions are consisted of the programs of the expanded BIOS in the
ROM and the keyboard controller (refer to Chapter 6 “Keyboard Controller”.). This library is used to
call the expanded BIOS and the keyboard controller from application programs developed with the C
language or Visual BASIC. The system library is consisted of the following files.
SysLib.H ..................... Header file for system library (for C language)
LibSysW.LIB .............. Common library for each memory model (for C language)
SysCall.DLL ............... System library
VKD.386 .................... Communication module for keyboard controller
The relationship among the files is as follow. If your application program is developed with
C language, LibSysW.LIB must be linked. It can call automatically SysCall.DLL when the
application program is executed.
Fig. 8.9
Application Program
written by VC
Application Program
written by VB
LibSysW.LIB
SysCall.DLL
Ext. BIOS VKD.386 KBC