mirror of
https://github.com/reactos/reactos.git
synced 2025-02-25 09:50:02 +00:00
f5d3c9254c
Separate external interrupts from interrupt signals (which are interrupts whose number is not known until they can be serviced, just like hardware interrupts on a real CPU). [NTVDM] Improve the PIC emulation code (IRQ priorities, etc...). Instead of checking for interrupts in the main loop, move the PS/2 input parsing to a different thread. Improve BIOS keyboard IRQ handling. svn path=/branches/ntvdm/; revision=60761
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
|
|
* 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 ******************************************************************/
|
|
|
|
BYTE PicReadCommand(BYTE Port);
|
|
VOID PicWriteCommand(BYTE Port, BYTE Value);
|
|
BYTE PicReadData(BYTE Port);
|
|
VOID PicWriteData(BYTE Port, BYTE Value);
|
|
VOID PicInterruptRequest(BYTE Number);
|
|
BYTE PicGetInterrupt(VOID);
|
|
|
|
#endif // _PIC_H_
|
|
|
|
/* EOF */
|