pic.c

#include "pic.h"

void kInitializePIC() {
    kOutPortByte(PIC_MASTER_PORT1, 0x11);
    kOutPortByte(PIC_MASTER_PORT2, PIC_IRQSTARTVECTOR);
    kOutPortByte(PIC_MASTER_PORT2, 0x04);
    kOutPortByte(PIC_MASTER_PORT2, 0x01);
    kOutPortByte(PIC_SLAVE_PORT1, 0x11);
    kOutPortByte(PIC_SLAVE_PORT2, PIC_IRQSTARTVECTOR + 8);
    kOutPortByte(PIC_SLAVE_PORT2, 0x02);
    kOutPortByte(PIC_SLAVE_PORT2, 0x01);
}

void kMaskPICInterrupt(WORD wIRQBitmask) {
    kOutPortByte(PIC_MASTER_PORT2, (BYTE) wIRQBitmask);
    kOutPortByte(PIC_SLAVE_PORT2, (BYTE)(wIRQBitmask >> 8));
}

void kSendEOIToPIC(int iIRQNumber) {
    kOutPortByte(PIC_MASTER_PORT1, 0x20);

    if(iIRQNumber >= 8) {
        kOutPortByte(PIC_SLAVE_PORT1, 0x20);
    }
}