Ah. If I change Global GX settings will these be applied to Channel launches?
EDIT:
I am running via a composite cable to an old 4:3 monitor, so the Wii is already set to (and can only be set to) 4:3 and 480i/EDTV.
I tried changing various settings in GX global settings to try:
force NTSC
force 4:3
differing cIOS as global loaders: dx2 v10 rev52 base 56 and base 57, and old rev21
I tried Black Tiger, a non-Neo Geo arcade game with the above. Same error message (error reading/writing to System memory) every time.
I chose Black Tiger as I noticed on old post by
@nakata6790 where he attached games and settings that worked for him which included black tiger, so I assume it is something on my setup:
https://gbatemp.net/threads/usb-loader-gx.149922/page-839#post-4573716
EDIT2:
Just sorted out neek2o v96 for testing. Booted direct into a working VC game (Altered beast) fine, exited back to the emulated Nand system menu, started Black Tiger - same error screen.
So currently Black Tiger for me works on real nand only, fails on EmuNand and neek2o.
I'll test some more titles but these seems strange from what I've read.