Match 4

DISCLAIMER: This game is not licensed, endorsed or sponsored by Nintendo nor SEGA corporation.

[Game Boy] Powered by GBDK-2020, hUGEDriver and VGM2GBSFX
[GENESIS / Mega Drive] Powered by SGDK and XGM2
Physics simulations done in Pymunk

Code (C, procedural) and Graphics by Kyuchumimo
Music provided by sl3DZ
Thanks to bbbbbr for providing pictures of the software running on real hardware
Thanks to EricDMG01 for providing a Mega EverDrive PRO to test on real hardware.

"Match 4: Crossplay video game of Four-In-A-Row for two players"

❕ To play this game you need two compatible systems (see list below), two reprogrammable cartridges / flashcarts and a game link cable or custom cable.

I/O port 2 on SEGA Genesis / Mega Drive compatible systems is used to establish communication similar to the link port on Game Boy compatible systems, it is therefore necessary to build an adapter.

NOTE: The SERIAL IN and SERIAL OUT signals must be crossed, in other words, the SERIAL IN signal of one system must go to the SERIAL OUT signal of the other system and vice versa.

On SEGA Genesis / Mega Drive compatible systems, since the software relies on a fixed frequency of the master clock to establish communication, it is only compatible with NTSC systems.

TROUBLESHOOTING
• COMMUNICATION ERROR screen

This screen can appear for several reasons, such as disconnection of the cables during a data transaction either caused by a bad connection of the cables or done on purpose, making a move too soon or receiving unexpected data.

Restart the systems and try to establish a game again.

ADVICE: Communication works by switching between master-slave and slave-master roles. This is seen in the message area as "WAITING..." and "YOUR TURN". Do not try to make a move instantly (e.g. by pressing A repeatedly) without waiting for the other system to be ready (WAITING...). Think first where you are going to drop the chip and then confirm with A. Otherwise an error screen may appear.