Hack Name:  BioHazard Battle Serial Link Cable Hack
Platform: 
Genre: 
Released by: 
Language: 
Status:  In-Progress
Patch Version:  0.1
Last updated:  December 30, 2024
Type of Hack:  Gameplay
Downloads:  25

Bio-Hazard Battle (Prototype) Modem Mode Patch

The prototype version of Bio-Hazard Battle includes a modem mode, with all the original code intact. Originally, the game communicated through the Genesis/Mega Drive Model 1’s 3rd controller port (EXT port), where a 1200-baud modem would typically connect.

This patch redirects the game’s communication to the 2nd controller port, enabling two consoles to link together for networked play. Instead of the original 1200-baud modem, the patch uses a serial link cable and increases the baud rate from 1200 to 4800 (max speed the genesis can communicate at).

Connection Instructions:

  1. Cable Setup:
    • Connect a serial cable between controller port 2 on each console. Please note the ‘Zero Tolerance’ link cable does not work and
      is wired much differently from a serial cable setup.
    • Wire the following pins:
      • TX (Pin 6) -> RX (Pin 9) (on the other console)
      • RX (Pin 9) -> TX (Pin 6) (on the other console)
      • Ground (Pin 8) -> Ground (Pin 8)
  2. In-Game Instructions:
    • Both players should navigate to the “Modem Start” menu.
    • Both players must be on the “Press Key to org” screen
    • When prompted with the message: “Press key to org”, one player presses a button to initiate the connection, followed by the other player which should start the match and put both players into the ship select screen.
Hashes: 
Filename: Bio-Hazard Battle (Prototype).md
CRC-32: 4f19a73d
SHA-1: 66439a7a4b8cb3f195a5830b62ceb03c68392ac2
Staff/Credits: 
B1tsh1fter
File download: 
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