The NeoGamma gamecube modes allow to change NeoGamma's behaviour when booting gamecube discs. All these settings are only relevant if there's a GC disc in the drive and it is "launched"

Once Waninkoko released rev6 of his cMIOS, NeoGamma will be able to use both GC loaders(its own and Waninkokos') without the need to install a new cMIOS. (it will obviously require to have Waninkoko's cMIOS rev6 installed) With MIOS GC mode it will load with Waninkoko's loader, with internal GC mode it will use its own loader. This way it will be possible to switch quickly between both to get the best from both.


The modes:

MIOS:
Just boot the MIOS, boots the GC disc the same way as Gecko OS and the old Gamma do

external*:
Makes the MIOS boot the _homebrew_ GC .dol located in the NeoGamma folder on sd card(sd:/NeoGamma/GC.dol). This is can be used for example to use WiiGator's 0.2 GC backup launcher instead of the modified version NeoGamma uses

internal*:
Launches the included GC backup launcher, which is a modification of WiiGator's 0.2 GC backup launcher. Currently this only boots GC games in regular mode(same as press A in the original) with the video mode selected in NeoGamma. For multi game discs, the selection which game to boot is moved to wii mode. Select 2nd disc with 1/Z, if no 2nd disc is selected it is auto detected, but currently the whole 2nd disc feature does NOT work!


*external and internal GC mode require a compatible cMIOS. WiiGator's cMIOS are compatible and Waninkoko's cMIOS rev 6+ will most likely also be compatible.