Author Topic: Mega Everdrive X7 - Master System BIOS Built In Games  (Read 1061 times)

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Offline flex

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Mega Everdrive X7 - Master System BIOS Built In Games
« on: April 29, 2019, 03:10 AM »
Just out of interest / for nostalgia I have been loading up the master system BIOS files individually to play the built in games (the ones that load up when no cartridge is inserted), however most of the BIOS files load up to a "Software Error" screen however If i load up "[BIOS] Hang-On (USA, Europe) (v3.4)" or "[BIOS] Missile Defense 3-D (USA, Europe) (v4.4)" these load up fine and all the games can be played including Snail Maze (if you hold up + button 1 & 2). The original 1.3 or the Alex Kidd BIOS versions don't want to play ball though.

Would be cool if it was possible to load up the BIOS files and have them all behave like no cartridge is inserted? Not sure what the difference is with the ones that do work.

I know there are other ways to play these games by loading up the roms directly but just curious how this works exactly.

P.S. I have the SMS BIOS option set to off in the config options otherwise this will not work at all.


Offline pcfreak324

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Re: Mega Everdrive X7 - Master System BIOS Built In Games
« Reply #1 on: April 29, 2019, 09:13 PM »
Here is a patch for the Alex Kidd BIOS to make it run as a regular game rom:
http://www.smspower.org/forums/10249-AlexKiddHamburgerHack#46880

And here is a hacked BIOS with the Snail Maze game:
http://www.smspower.org/uploads/Development/BIOS13.zip

Offline flex

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Re: Mega Everdrive X7 - Master System BIOS Built In Games
« Reply #2 on: May 01, 2019, 10:01 PM »
Here is a patch for the Alex Kidd BIOS to make it run as a regular game rom:
http://www.smspower.org/forums/10249-AlexKiddHamburgerHack#46880

And here is a hacked BIOS with the Snail Maze game:
http://www.smspower.org/uploads/Development/BIOS13.zip

Excellent thanks mate. I didn't realize the hamburger for Alex Kidd was only in the BIOS version .... I was wondering about that!