Since you need ISO 58 to use sega cd suppoort at full speed from USB...

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Maybe have the app check if 58 is loaded, and if it isn't, then have it reload 
into 58? For whatever reason, getting this thing to boot with anything other 
than the homebrew channel is a big pain due to this.

Original issue reported on code.google.com by cheatfreak47 on 20 Oct 2012 at 5:22

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i'd prefer not doing this but we never know

Original comment by ekeeke31@gmail.com on 20 Oct 2012 at 1:51

• Changed state: WontFix

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Question, does MegaCD require ahbprot access to work right, because it works 
fine when booted through HBC, but does not when booting from other dol loaders.

Original comment by cheatfreak47 on 20 Oct 2012 at 9:13

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be more precise, what does or not "work fine" exactly ?
ahbprot is only needed for dvd access

Original comment by ekeeke31@gmail.com on 21 Oct 2012 at 8:29

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It runs CD games slower from USB, presumably due to a lack of 2.0 speed. I 
assume it's a IOS 58 thing. I'm booting it with r1203 of USB loader GX's 
homebrew launcher (with GX being booted from a forwarder installed in 
priiloader mod) It seems random what it boots apps with, as of now. I think 
Cyan is gonna add a force homebrew loading with ios 58 setting, so i wouldn't 
worry too much. Was just wondering, since Genplus GX has always been stubborn 
with what it's booted with.

Original comment by cheatfreak47 on 21 Oct 2012 at 9:34

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The game that runs all slow is sonic cd, btw, both J and U versions. 

Original comment by cheatfreak47 on 21 Oct 2012 at 9:38

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Any games will run slow from a slow USB device, if it only affect a specific 
game then this is no normal, unless that's the only game you tried which had cd 
audio or is accessing the disc continuously during gameplay. Sonic CD is 
notoriously slow on real hardware as well, compared to Sonic on Mega Drive, so 
there might be unnormally slow and normally slow games.

Finally, genplus gx does not care from where it is booted from, it's more that 
some loaders might be coded by people who don't really know what they are doing 
and have been copypasting dol loading codes from other old loaders without 
understanding how it works or what limitations were
It's up to the loader to setup correct IOS for homebrew, not homebrew itself, 
it's not "forcing", it's the way it should be done

Original comment by ekeeke31@gmail.com on 22 Oct 2012 at 5:54

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The thing is, it works fine and is at full speed when the emulator is booted 
with homebrew channel. I'm not sure what the problem is, really. My best guess 
is that the emulator isn't being booted with IOS 58, for 2.0 speed access. 

Original comment by cheatfreak47 on 22 Oct 2012 at 3:26

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With apologies to Eke-Eke for speaking on his behalf, what he's saying is that 
the problem is external to Genesis Plus GX. It would be more productive to 
report this issue to the developers of the loader you're using to get them to 
fix it on their end. 

Original comment by vaguerant on 25 Oct 2012 at 8:47

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@vaguerant Of course its an external issue. I was simply proposing an internal 
solution. I knew that from the beginning. He made it WontFix (which, i honestly 
expected that) So, I just asked a question that would help me understand the 
nature of the problem, so that i could fix it, since he IS the coder of this 
fine emulator, i figured he could help me, and he did.

And thats been already done, btw. As I said, Cyan is working on it.

Original comment by cheatfreak47 on 25 Oct 2012 at 7:24