#include "../lib/types.h"
#include "io.h"

// master
#define PIC1		0x20
#define PIC1_CMD	PIC1
#define PIC1_DATA	(PIC1+1)

// slave
#define PIC2		0xa0
#define PIC2_CMD	PIC2
#define PIC2_DATA	(PIC2+1)

// ICWx
#define ICW1_ICW4		0x01
#define ICW1_SINGLE		0x02
#define ICW1_INTERVAL4	0x04
#define ICW1_LEVEL		0x08
#define ICW1_INIT		0x10
 
#define ICW4_8086		0x01	
#define ICW4_AUTO		0x02	
#define ICW4_BUF_SLAVE	0x08	
#define ICW4_BUF_MASTER	0x0C	
#define ICW4_SFNM		0x10	

#define ICW_INIT_MASK	(ICW1_INIT | ICW1_ICW4)

// ISR & IRR
#define PIC_R_IRR		0x0a
#define PIC_R_ISR		0x0b

// Ints
#define PIC_EOI	0x20 // End-of-interupt

// PIC
void pic_send_eoi(uint8);
void pic_remap(uint, uint);
void pic_disable();

// IRQs
void irq(uint8, bool);

static uint16 irq_reg(int ocw3);