Sega Master System - Bock's SMS Boot Loader BIOS Kit

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Quick Overview

Bock's SMS Boot Loader 28-pin BIOS and socket.

Sega Master System - Bock's SMS Boot Loader BIOS Kit

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Details

This kit contains a replacement 28-pin BIOS EPROM and EPROM socket for the original Sega Master System (not the redesigned SMS2).

Installation may require a small PCB modification, detailed in the wiki

This BIOS bypasses region checks and allows you to choose which port to boot SMS software from, Cartridge, Card, or Expansion.

Compatibility Notes:

This BIOS only works with 837-6629 revision PCBs.  Most SMS are 837-6629, if your SMS has built-in games, it is almost certainly a 837-6629.

If you have an 837-6067 PCB, your SMS will not have a built in game.  Powering it up without a cartridge will present a screen asking you to power off the console and insert a game.  We offer an experimental version for 837-6067 PCBs - please see the related products.

 

From smsboot.txt:

It has the advantage of not checking any country code or header, so basically it is possible to boot up an original Japanese mycard game (for SG-1000 or Mark III) on your US or European Master System 1.

You can also use it to boot Brasilian 8 megabits games which are not supported by all models of Master System 1.

Last but not least, using a homemade pinout converter, it would be possible the same way to boot up any SG-1000/SC-3000 or Mark III/SMS cartridge.


For information about the SMS Boot Loader, see the entry at SMS Power

Additional Information

Compatible Hardware Sega Master System
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