NES

CodeMaster

Play online for free: no sign-up, no install, right in your browser.

Emulator

Frame rate: 0 FPS
Speed: 0 %
Uptime: 0:00
Controller: Keyboard

Emulated console

CPU: Ricoh 2A03 (6502), 1.79 MHz
Memory: 2 KB RAM
Video: PPU, 256×240, 54 colors
Video memory: 2 KB VRAM
Sound: 5 channels: 2 pulse, triangle, noise, DPCM
Cartridge: Mapper 0 · NROM, 16 KB / 8 KB
Emulator core: FCEUmm (EmulatorJS)

About CodeMaster

Platform: NES
Developer: Daniel Vukelich
Year: 2013
Genre: Puzzle
Players: 1-2
License: Homebrew

Daniel Vukelich's version of the board game Mastermind: crack a hidden four-symbol code chosen from eight symbols, with coloured dots after each guess telling you how close you are. One or two players, Normal or Hard.

Facts

Written in 6502 assembly with the Asm6 assembler; the source is on GitHub.
Introduced on the NESdev forum as the author's first NES game that was not a Pong variant.

Cartridge

Mapper: 0 · NROM
PRG / CHR: 16 KB / 8 KB
Mirroring: Horizontal
Saves: No

24,592 bytes · CRC32 1A757C16 · MD5 7878958bdb9b31e9eacb2ed1bcf6d43d

Keyboard controls

D-pad: ← ↑ ↓ →
A: Z
B: X
Start: Enter
Select: V

Steam Controller

D-pad: D-pad
A: A
B: B
Start: Start
Select: Select

Xbox controller

D-pad: D-pad
A: A
B: B
Start: Menu
Select: View

DualSense controller

D-pad: D-pad
A: ✕
B: ○
Start: Options
Select: Create

Keys and controller buttons can be remapped with the Controls button under the game. Save and Load keep a snapshot of the game in your browser. Steam Controller works as a gamepad through Steam Input. On phones, on-screen buttons appear.