What is this?

This is a port of gameboy4iphone to the Espressif ESP32 chip. I was allowed to use this input / outputesp32-nesemu

Although it moves without prejudice, processing becomes slow when it is a complicated screen. (However, because of the low speed of the SPI LCD used and the overhead of pushing pixels to it, the framerate is limited to 15-20FPS for now.)

What do I need to use this?

You will need:

• A board containg an ESP32 chip and at least 4MB (32Mbit) of SPI flash, plus the tools to program it.
• A backup of a GameBoy ROM game cartridge
• A 320x240 ILI9341 display, controllable by a 4-wire SPI interface. You can find modules with this LCD by looking for '2.2 inch SPI 320 240 ILI9341' on eBay or other shopping sites.
• Optional, but highly recommended: A Playstation 1 (PSX) or Playstation 2 controller to actually play the game

How do I hoop up my board?

LCD:

=====  =======================
Pin    GPIO
=====  =======================
MISO   25
MOSI   23
CLK    19
CS     22
DC     21
RST    18
BCKL   5
=====  =======================

(BCKL = backlight enable)

(Make sure to also wire up the backlight and power pins.)

Sound(Analog Out)

=====  =====
Pin    GPIO
=====  =====
SOUND  26
=====  =====

(Obviously, also hook up the power pins and connect the sound output to an amp or headphones or so.)

PSX/PS2 controller

=====  =====
Pin    GPIO
=====  =====
CLK    14
DAT    27
ATT    16
CMD    2
=====  =====

Also connect the power and ground lines. Most PS1/PS2 controllers work fine from a 3.3V power supply, if a 5V one is unavailable.

How do I program the chip?

Using a tool capable of flashing the SPI flash connected to the ESP32, program the following files to the following addresses: esptool.py --chip esp32 --port "/dev/ttyxx" --baud $((921600)) write_flash -fs 4MB 0x140000 xxxx.gb(gbc)

Flash

=====  =====
nvs,      data, nvs,     0x9000,   0x6000
phy_init, data, phy,     0xf000,   0x1000
factory,  app,  factory, 0x10000,  0x0E0000
smsgame,  0x40, 0x01,    0x140000, 0x2C0000 (game ROM image)-> 0x140000
=====  =====

Because of copyright reasons, you will have to supply the game rom image yourself.

Details of the program

Move GAME emulator with ESP 32

License/legal

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