I successfully launched Swiss on my Gamecube using the Swiss card in memory card A and then the Legend of Zelda exploit.
Is the Gecko necessary if I’m using a SD2SP2 adapter with an attached microSD card?
SD Gecko and SD2SP2 are interchangeable in all cases EXCEPT:
DOL-101 does not have Serial Port 2
Action Replay does not support SD2SP2 or 4GB+ Cards
SD Gecko
SD2SP2
Swiss >= v0.5
✅
✅
DOL-001
✅
✅
1MB - 2GB SD
✅
✅
4GB - 2TB SDHC, SDXC UHC-III
✅
✅
GCMM >= v1.5
⚠️ (hold Z to access)
✅
GCMM <= v1.4f
✅
❌
Emulators
✅
⚠️ (mixed support)
Use Both Card Slots
❌
✅
Quick & Easy Access
✅
❌
DOL-101
✅
❌
Action Replay (Boot)
✅
❌
Old (Pre-2019) Homebrew
✅
❌
I prefer the SD Gecko because it's more convenient, but the SD2SP2 is the new hotness and it works just as well. I think some people feel like it looks cleaner to hide the SD card away - and there are a few games that require two memory cards (for replays or some such, I believe).
Can I Use Either? Yes, Mostly
Some homebrew (old emulators, media players, etc) don't work with the SD2SP2.
Some homebrew will default to SD2SP2 and won't let you switch once it's selected.
Can I Use Both? Yes, Mostly
Swiss (v0.5+), GCMM (v1.5+), and some other homebrew allow you to switch between the SD Gecko and SD2SP2 either seamlessly, or with a restart.
Card Size - Swiss
You can use ANY SIZE CARD with either the SD Gecko or SD2SP2 if you can already get into Swiss
Action Replay: SD Gecko + 2GB Card
If you only have Action Replay, you must use a 2GB or smaller card in the SD Gecko.
Once you boot into Swiss, you can use any size card.
Which to choose?
SD Gecko and SD2SP2 are interchangeable in all cases EXCEPT:
(hold Z to access)
(mixed support)
I prefer the SD Gecko because it's more convenient, but the SD2SP2 is the new hotness and it works just as well. I think some people feel like it looks cleaner to hide the SD card away - and there are a few games that require two memory cards (for replays or some such, I believe).
Can I Use Either? Yes, Mostly
Some homebrew (old emulators, media players, etc) don't work with the SD2SP2.
Some homebrew will default to SD2SP2 and won't let you switch once it's selected.
Can I Use Both? Yes, Mostly
Swiss (v0.5+), GCMM (v1.5+), and some other homebrew allow you to switch between the SD Gecko and SD2SP2 either seamlessly, or with a restart.
Card Size - Swiss
You can use ANY SIZE CARD with either the SD Gecko or SD2SP2 if you can already get into Swiss
Action Replay: SD Gecko + 2GB Card
If you only have Action Replay, you must use a 2GB or smaller card in the SD Gecko.
Once you boot into Swiss, you can use any size card.