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