8.6.2System 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.

Application Program

LibSysW.LIB

Application Program

written by VC

 

written by VB

SysCall.DLL

KBC

VKD.386

Ext. BIOS

Fig. 8.9

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Casio IT-2000W manual System Library, Kbc