import { AddressBus } from '../memory/address-bus';
import { CPURegisters } from './cpu-registers';
import { CPUTimer } from './cpu-timer';
export declare class CPU {
    private registers;
    private addressBus;
    private firstCycle;
    private skipCycles;
    private cpuCallbacks;
    private stopped;
    private halted;
    private haltBug;
    private interruptsEnabled;
    private timer;
    constructor(addressBus: AddressBus, cpuTimer: CPUTimer);
    reset(): void;
    tick(): void;
    getRegisters(): CPURegisters;
    private singleTick();
    private executeInterrupts();
    private executeOpcode();
}
export declare enum CPUInterrupt {
    VBLANK = 0,
    LCDSTAT = 1,
    TIMER = 2,
    SERIAL = 3,
    JOYPAD = 4,
}
export declare const CPU_CLOCK_FREQUENCY: number;