hal.h

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#include <stdint.h>
#include <basics.h>
 
#define pic1_command 0x20
#define pic1_data 0x21
#define pic2_command 0xA0
#define pic2_data 0xA1

void init_hardware_abstraction_layer(void);

void outb(uint16 port, uint8 value);

uint8 inb(uint16 port);

void outw(uint16 portNumber, uint16 data);

uint16 inw(uint16 portNumber);

uint32 inl(uint16 portNumber);

void outl(uint16 portNumber, uint32 data);

void io_wait(void);
void io_wait_us(uint32_t usec);
void io_wait_ms(uint32_t msec);