gumbyx84 said:
3-in-1: How to you access the GB/GBC ROMs on your Slot 1 when you are booted to your Slot 2?
Well... Goobma Color creates a GBA game that is the Emulator + Game(s).
From there you'd run it like any other GBA game.
Goomba Color comes with a program to automate making the "ROM" called Goomba Front.
First you select the GB Emulator (goomba.gba usually, _mb.gba if you have problems with multiboot and _save32 if you have problems with the save size).
Then you can select the name of the GBA file you'll create (or skip this til the end).
And below that is a list of all the GB/GBC games found (starts in the Goobma Color folder) you can double click to add.
On the list of added files you can choose to rename them, they default to the header name.
Then click Compile near the bottom.
If you have just one game, it autoboots it.
If you have multiple, it starts to play the game and has an overlay with the names. You'll have to use the arrows to select the game and press A or Start to run it properly.
Given that Goomba Color takes up ~0.1MB, I'd suggest making one GBA file for each GB/GBC game, unless you feel like messing around with what looks like a trimmer app included with the files.