nes-emu/cpu/addressings/_indexedGetAddress.js

A NES emulator

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = indexedGetAddress;
var _helpers = require("../../helpers");
function indexedGetAddress(register) {
  return function (_ref, address, canTakeExtraCycles) {
    let {
      cpu
    } = _ref;
    const newAddress = address + cpu.registers[register].value;
    const pageCrossed = _helpers.Byte.highPartOf(address) !== _helpers.Byte.highPartOf(newAddress);
    if (pageCrossed && canTakeExtraCycles) cpu.extraCycles++;
    return _helpers.Byte.force16Bit(newAddress);
  };
}