Multirom with Menu Sega Genesis orAnyone have any Mega Drive

[hardgb]

This is my first question in this forum, so I apologize if I'm doing it wrong.

I'm looking for information on how to mount a rom "Sega Genesis" with 2 or more games. No forum (http://www.ultimate-consoles.fr/topic/14722-sega-multigame-maker/) has a program that creates the rom with the games, but I want to know, how to put a menu so you can choose the games. Same as image ()

Anyone have any idea how to do this?

[Tamkis]

Ask, and thou shalt receive
(Krikzz has a multi-rom creator program)

[arcadetv]

You should gather some info on the technique called 'bankswitching'.
In short: when you put two 8mbit games on a 16mbit eprom by concatenating (in cmd: copy /B rom1.bin+rom2.bin tworomsInOne.bin) then you can use the highest address-line to chose either the first or the second half of whats visible to the Hardware by connecting the line to either Vcc or GND.
If you use the two highest address-lines you can have 4 games each 4mbit on it, but still need to select the games manually.
Now, if you use a 'mapper', that's an additional IC that handles this process for you you can talk to it by putting your menu in the first region of your rom.
Anything beyond this is above my head i'm afraid.