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//+----------------------------------------------------------------------------
//
// File: interrupts.h
//
// Module:
//
// Synopsis:
//
// Created: sgasch 6 Jul 2003
//
//+----------------------------------------------------------------------------
#ifndef _INTERRUPTS_H_
#define _INTERRUPTS_H_
#define NUM_IDT_ENTRIES (256)
// Exceptions range from 0x00..0x11
#define FIRST_EXCEPTION 0x00
#define LAST_EXCEPTION 0x11
#define NUM_EXCEPTIONS 18
// External IRQs range from 0x30..0x3F
#define FIRST_EXTERNAL_INT 0x30
#define LAST_EXTERNAL_INT 0x3F
#define IRQ0 0x30
#define IRQ1 0x31
#define IRQ2 0x39
#define IRQ3 0x33
#define IRQ4 0x34
#define IRQ5 0x35
#define IRQ6 0x36
#define IRQ7 0x37
#define IRQ8 0x38
#define IRQ9 0x39
#define IRQ10 0x3A
#define IRQ11 0x3B
#define IRQ12 0x3C
#define IRQ13 0x3D
#define IRQ14 0x3E
#define IRQ15 0x3F
#define NUM_EXTERNAL_INTS 16
typedef struct _INTERRUPT_GATE
{
USHORT offsetLow;
USHORT segmentSelector;
USHORT reserved : 5;
USHORT signature : 8;
USHORT dpl : 2;
USHORT present : 1;
USHORT offsetHigh;
}
INTERRUPT_GATE;
typedef union _IDT_ENTRY
{
INTERRUPT_GATE i;
// In theory we could have members for trap gates
// and task gates if we wanted.
}
IDT_ENTRY;
//
// Defined in intsupport.asm
//
extern void HalInterruptInitializePICs(void);
extern void HalInterruptLoadIDTR(void *uLimitAndBase);
extern void HalIoDelay(void);
extern BYTE HalInterruptHandlerPreamble;
extern BYTE HalInterruptHandlerPreambleBefore;
extern BYTE HalInterruptHandlerPreambleAfter;
//
// Defined in interrupts.c
//
extern void HalDisableInterrupts(void);
extern void HalEnableInterrupts(void);
//
// Defined in keyboard.c
//
extern void HalKeyboardInt(INTERRUPT_STATE *is);
//
// Defined in timer.c
//
extern void HalTimerInt(INTERRUPT_STATE *is);
#endif
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