nes-emu
Version:
A NES emulator
34 lines (33 loc) • 1.16 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _helpers = require("../helpers");
var _lodash = _interopRequireDefault(require("lodash"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/** A mixin for reading bytes in Little Endian. */
var _default = exports.default = {
/** Applies the mixin. */
apply(obj) {
_lodash.default.defaults(obj, _lodash.default.omit(this, "apply"));
},
/** Reads `length` (1 or 2) bytes in LE from `address`. */
readBytesAt(address, length) {
if (length === 0) return null;
return length === 2 ? this.read2BytesAt(address) : this.readAt(address);
},
/** Writes two bytes in LE to `address`. */
write2BytesAt(address, value) {
const low = _helpers.Byte.lowPartOf(value);
const high = _helpers.Byte.highPartOf(value);
this.writeAt(address, low);
this.writeAt(address + 1, high);
},
/** Reads two bytes in LE from `address`. */
read2BytesAt(address) {
const low = this.readAt(address);
const high = this.readAt(address + 1);
return _helpers.Byte.to16Bit(high, low);
}
};