Got the menu integrated into the chip8 emulator hardware, along with some power-on tests including a two-tone beep not entirely unlike a well-known handheld. Now I need to go back through Opcodes adding quirk support for chip8, then I can start on superchip.

I decided to call the hardware platform Stella, after me mam. This infuriates my inner Atari 2600 enthusiast, but meh.