ICS Advent AOB8/16 Product Manual page 38

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IRQGEN.VXD

Description

IRQGEN.VXD is a Virtual Device Driver, or VxD, for Windows95. Together with

Win32IRQ.DLL, it allows a program to easily respond to hardware interrupt requests, or IRQs.

Installation

To install IRQGEN.VXD, copy it to C:\Windows\System. If your hard drive has a letter other than

C, substitute the appropriate letter. It is not necessary to reboot your system prior to using

IRQGEN.VXD.

Win32IRQ.DLL

Description

Win32IRQ.DLL is a Dynamic Link Library, of DLL, for Windows95. It provides a simple interface

to IRQGEN.VXD, allowing a program to easily respond to hardware interrupts. Three functions are

exported by Win32IRQ.DLL: InitIRQ,, Detect IRQ, and SendEOI. To use these functions in a

program, they must first be inported. In Pascal, the necessary lines would be:

function InitIRQ (MyIRQ: Byte) : Boolean; stdcall;external 'Win32IRQ.dll'

index 1;

function DetectIRQ: Boolean; stdcall; external "Win32IRQ.dll"index 2;

function SendEOI: Boolean; stdcall; external "Win32IRQ.dll" index 3;

In C, the library file Win32IRQ.lib must first be linked to the program. This is accomplished by

adding it to the project or editing the makefile. The following lines would then create the prototypes

for the DLL functions:

extern "c" _declspec (dllimport) bool pascal InitIRQ (unsigned char MyIRQ);

extern "c" _declspec (dllimport) bool pascal DetectIRQ (void);

extern "c" _declspec (dllimport) bool pascal SendEOI (void) ;

InitIRQ

This function performs the initialization required to detect IRQs. It must be called before

DetectIRQand SendEOI can be called, although calling those functions first will only cause them to

return a value of FALSE. The function's sole parameter is an unsigned 8-bit value containing the

IRQ number to monitor. The return result is TRUE if initialization was compledted successfully,

FALSE if not.

Addendum: 00650-010-6B

ADDENDUM

IRQGEN.VXD and Win32IRQ.DLL

Chapter X: XXXXX

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