It looks like this is fixed for me. I didn't do anything special. Just waited some time and then updated the lr-reicast package via the RetroPie Setup script, and lr-reicast is working again. Thanks to the developer(s)!
@BuZz Thank you very much for the reply. I figured it would work as 32bit software generally works in a 64bit environment. I guess I was really just posting because I wanted to know of there were any particular omissions.
However, I needn't have worried. I installed ububtu and retropie on my NUC today. With the instructions on the Retropie site it couldn't have been easier. I am extremely pleased with the result. The increased power let's me use run ahead and disable video threading. I still love my Pi's though, and they will definitely see use.
On my overclocked Pi 3, I also use Mame2010. It is good enough to handle it. But that should not bother you. In fact, I have an third emulator for arcade games (fba), because there are a lot games working better. On PC, I just could use the newest version. But if your pc is a little bit old, then performance could still be a problem with some 3D titles.
EDIT for PCSX2: all is ok. It works fine. Found how to do :D
EDIT for PSX: can't find anything for this issue. And if tehre are 2 players, i have to do same change for all players, not only for the first one.
Yet, when game is loading I can see Core remap file loaded. But doesn't use config in this file.
@movisman good to hear you're going to go back to it!
In the end the e35 wasn't powerful enough and required legacy AMD drivers. I ended up with an ASRock AIO board rocking an Intel J3160 and it is flying.
After a huge amount of experimentation Linux Mint XCFE was my final distro. Light enough to keep performance high and startup times low but feature-full enough that I can back out of ES and use it for other things should the mood take me.
My RPi3 kinda got abandoned in the end due to hitting SD card limits or poor performance in PSX and 64 games so with this x86 install giving me that extra oomph, I'm fully invested again!
OK, I see the coolcv_x86_64 and coolcv_i686 binaries in the latest "all" bundle.
Not sure how I missed this earlier.
In any case, coolcv isn't enabled on retropie x86, so I can't install it from the retropie_setup as it doesn't show up in any of the package lists.
Might be worth adding now? Perhaps try to determine which build would be required (i686,x86_64) at module install time?
Or perhaps just go with i686 for compatibility? (I hardly think it's going to stress the computer's memory :) )