This project emulates the Volkswagen Premium 5 car radio made by Delco. Built on k0emu and k0dasm, it runs all known versions of the radio's original firmware without patches. Its purpose is to aid in continued reverse engineering of the radio and to help test firmware mods.
Emulated components include the undocumented Renesas (NEC) µPD78F0831Y microcontroller (which turned out to be a subset of the µPD78F0833Y), the µPD16432B LCD controller (SPI), and the STMicroelectronics M24C04 EEPROM (I2C). A high-level emulation of a Multi-Function Steering Wheel (MFSW) is also implemented, allowing the radio's response to steering wheel controls to be tested.
Watch the emulator run in this video: the radio prompts for the SAFE code on power up, and if the correct code is toggled in, unlocks and responds to all buttons. For example, FM mode can be selected and the frequency changed. The emulator does not produce audio, nor does it emulate the tape deck or CD changer.
- Boots and runs the original firmware without patches
- Web UI with interactive faceplate: button input and pixel-perfect LCD
- Disassembly and listing views for debugging
- Register, memory, and EEPROM inspection
- Single step, slow run, or real-time emulation
The emulator consists of two parts: the emulation backend written in Python and a web-based frontend. Although the standard Python 3 interpreter (CPython) is supported, PyPy is required for real-time emulation at the original 4.19 MHz clock speed. Install premium5 under PyPy with:
pypy3 -m pip install git+https://github.com/mnaberez/premium5.git
Run the premium5 executable and open the indicated URL in a browser:
$ premium5 <firmware.bin>
Premium 5 emulator
http://localhost:8080
A firmware binary is required. One can be built, byte-identical to the original, from this disassembly.
For more options, run premium5 with no arguments.