Subversion Repositories thor

#pragma once

#include "clsDevice.h"

#include "clsCPU.h"

#include "clsThor.h"

extern clsThor cpu1;

class clsPIC : public clsDevice

{

        bool enables[16];

public:

        bool irq30Hz;

        bool irq1024Hz;

        bool irqKeyboard;

        unsigned int vecno;

        clsPIC(void);

        void Reset();

        bool IsSelected(unsigned int ad) {

                return ((ad & 0xFFFFFFC0)==0xFFDC0FC0);

        };

        unsigned int Read(unsigned int ad) {

                int nn;

                unsigned int dat;

                switch((ad >> 2) & 15) {

                case 0:

                        return vecno;

                default:

                        dat = 0;

                        for (nn = 0; nn < 16; nn++)

                                dat |= (enables[nn] << nn);

                        return dat;

                }

        };

        void Write(unsigned int ad, unsigned int dat, unsigned int mask) {

                int nn;

                switch((ad >> 2) & 15) {

                case 1:

                        for (nn = 0; nn < 16; nn++)

                                enables[nn] = dat & (1 << nn);

                        break;

                case 2:

                        enables[dat & 15] = false;

                        break;

                case 3:

                        enables[dat & 15] = true;

                        break;

                case 5:

                        if (dat==2)

                                irq1024Hz = false;

                        if (dat==3)

                                irq30Hz = false;

                        if (dat==15)

                                irqKeyboard = false;

                        break;

                }

        };

        void Step(void) {

                vecno = 448;

                cpu1.irq = false;

                if (enables[15] & irqKeyboard) {

                        cpu1.irq = true;

                        vecno = 448+15;

                }

                if (enables[3] & irq30Hz) {

                        cpu1.irq = true;

                        vecno = 448+3;

                }

                if (enables[2] & irq1024Hz) {

                        cpu1.irq = true;

                        vecno = 448+2;

                }

                cpu1.vecno = vecno;

        };

};