nes-emu/apu/registers/APUFrameCounter.js

A NES emulator

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _registers = require("../../registers");
/** Sets frame counter options (e.g. sequence type). */
class APUFrameCounter extends _registers.WriteOnlyInMemoryRegister {
  constructor() {
    super();
    this.addReadOnlyField("interruptInhibitFlag", 6).addReadOnlyField("use5StepSequencer", 7);
  }

  /** Resets the APU Frame Counter and fires the appropriate callbacks. */
  writeAt(__, byte) {
    this.setValue(byte);
    const {
      apu
    } = this.context;
    apu.frameClockCounter = 0;
    apu._onQuarter();
    apu._onHalf();
  }
}
exports.default = APUFrameCounter;