Sega Master System BIOS (M404 prototype)

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Title Screen
Sega Master System BIOS (M404 prototype)
Dump status Released
Dumped by SMSPower.org
Released by SMSPower.org
Origin EPROM
EPROMs 1x
Game Sega Master System BIOS
System Sega Master System
Genre BIOS
Release date JP Oct 1987
US Sep 1986
EU 1987
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A prototype version of the BIOS featured in an early Sega Master System unit.

Origin