v1.0 Prototype

This is a sub-page of Proto:Sega Master System BIOS.

This prototype is documented on Hidden Palace.

This page or section needs more audio. There's a whole lotta words here, but not enough audio. Please fix this. Specifically: Rip and compare both versions of the Sega jingle.

This needs some investigation. Discuss ideas and findings on the talk page. Specifically: See if the Snail Maze music is different.

Differences#

• The final boot screen is present, but not animated.
• The sound engine is present, but never called. Due to this, the BIOS is completely silent.
• The jingle found in v1.3 and later is present, but different.
• Snail Maze is not present, but its music is.
• There is no code to handle the Reset button.
• The Sega and Master System logos are stored uncompressed. In v1.3 and later, they are stored using the same compression method used in Phantasy Star.
• Starting with this version, the BIOS checks for the string TMR SEGA at $7ff0, $3ff0, and $1ff0 in order to check if a cartridge/card is inserted.
• The instructions screen in v1.3 is not present. If no cartridge/card is inserted, the BIOS will show a screen similar to the software error screen in the final, with a flashing question mark. If there is a software error, the system will display "CHECK SUM ERROR" before the question mark:

Proto	Final (v4.4)