nes-emu/ppu/registers/PPUAddr.js

A NES emulator

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _registers = require("../../registers");
/**
 * PPU Address Register (>> write twice, upper byte first)
 *
 * Write the PPU address you want to access here, then write in `PPUData`.
 * Connected to `LoopyRegister`.
 */
class PPUAddr extends _registers.WriteOnlyInMemoryRegister {
  /** Alternately writes the MSB and the LSB of the address, and updates scrolling metadata. */
  writeAt(__, byte) {
    this.context.ppu.loopy.onPPUAddrWrite(byte);
  }

  /** Returns the address. */
  get address() {
    return this.context.ppu.loopy.vAddress.to14BitNumber();
  }

  /** Sets the address. */
  set address(value) {
    this.context.ppu.loopy.vAddress.update(value);
  }

  /** Returns the write latch. */
  get latch() {
    return this.context.ppu.loopy.latch;
  }
}
exports.default = PPUAddr;