reactos/subsystems/ntvdm/pic.h

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/*
* COPYRIGHT: GPL - See COPYING in the top level directory
* PROJECT: ReactOS Virtual DOS Machine
* FILE: pic.h
* PURPOSE: Programmable Interrupt Controller emulation (header file)
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
*/
#ifndef _PIC_H_
#define _PIC_H_
/* INCLUDES *******************************************************************/
#include "ntvdm.h"
/* DEFINES ********************************************************************/
#define PIC_MASTER_CMD 0x20
#define PIC_MASTER_DATA 0x21
#define PIC_SLAVE_CMD 0xA0
#define PIC_SLAVE_DATA 0xA1
#define PIC_ICW1 0x10
#define PIC_ICW1_ICW4 (1 << 0)
#define PIC_ICW1_SINGLE (1 << 1)
#define PIC_ICW4_8086 (1 << 0)
#define PIC_ICW4_AEOI (1 << 1)
#define PIC_OCW2_NUM_MASK 0x07
#define PIC_OCW2_EOI (1 << 5)
#define PIC_OCW2_SL (1 << 6)
#define PIC_OCW3 (1 << 3)
#define PIC_OCW3_READ_ISR 0x0B
typedef struct _PIC
{
BOOLEAN Initialization;
BYTE MaskRegister;
BYTE IntRequestRegister;
BYTE InServiceRegister;
BYTE IntOffset;
BYTE ConfigRegister;
BYTE CascadeRegister;
BOOLEAN CascadeRegisterSet;
BOOLEAN AutoEoi;
BOOLEAN Slave;
BOOLEAN ReadIsr;
} PIC, *PPIC;
/* FUNCTIONS ******************************************************************/
VOID PicWriteCommand(BYTE Port, BYTE Value);
VOID PicWriteData(BYTE Port, BYTE Value);
VOID PicInterruptRequest(BYTE Number);
BYTE PicGetInterrupt(VOID);
BOOLEAN PicInitialize(VOID);
#endif // _PIC_H_
/* EOF */