Feature Request: Load and use BIOS files

[skooterblog]

Maybe it's not a priority now, but I'm just bringing my old feature suggestion for the SMS core to this new core:

Most Master System models included games built-in in their BIOS files. Though most of these games were released in cartridges, there are exceptions like the Snail Maze game and Alex Kidd in Miracle World, in which the BIOS version is different from the cartridge one: buttons are swapped (jump is on the right, punch is on the left, which is more natural), and hamburgers replaced the rice bow sprites (for "Americanization" I guess).

Mega Everdrive and Mega Sg have options to load and use BIOS files. We can use them together with a blank ROM to play the built-in games. We can also use them with game ROMs to see the SEGA logos and/or SEGA tunes which are presented before the ROM loads, for nostalgic reasons.

My suggestion is that this feature is included in the core. It would be a nice addition and make it more complete.

[sorgelig]

I'm not sure if this feature will work in MD core.
This core already uses initial BIOS for SMS like in original SMS core, but there is no SEGA animation in the beginning.

I will check this feature.

[synchronizelove]

Would love this feature for nostalgia. Model 2's had these bios to combat unauthorized games.
Here's how it looked: https://www.youtube.com/watch?v=KVWVp1RQQyM