hm.
2007 he was stable-ish.
2008 he is more raw unpolished...
I'm not completely sure that it's impossible to get turbo on the 770.
over the years ...anytime someone said "doubt _ _ _ _ will work" ...someone else got something working ...regardless of the model.
So I frankly rule nothing out.
However...realistically ...I do see the inherent limitations in the 770 that are not there compared to say the n8x0 or the n900...
Considering the last firmware for the 770 is 2008 (he)
and diablo turbo came out for the n8x0 and was finished/ polished in 2010 ...By then I would imagine most 770 users would have accepted the natural built-in limitations of the 770 and had since migrated to the n8x0. I pretty much was one of those people myself ..So I never tried to beat turbo into the 770 ..(I still used it for a lonnnnggg time...but in the end I migrated like pretty much everybody else.....still turn the key and make sure the engine still turns over in old "betsy" ...but ...today that is all I pretty much do with it...whilst my mind wanders down memory lane. )
. I find that there is more continuous devel (how ever it may have slowed over the last few years ...it is still happening) happening by n8x0 owners to this day compared to the 770.
I don't pin the lack of devel to just one thing ..rather a few things...
1-migration to the next device by many.
2-the limitations of the device (albeit ..that is a matter of personal perspective)
so...what I'm saying is the 770 is a great device...the limitations of it give a comfortable pre-defined understanding of how far and where and what you can do with it in compare to applicable software and code. This is an advantage in my opinion.
You will most likely be able to get many components of turbo into it.
But not ALL of them I'm betting. Since turbo was designed for the n8x0 after all. So you may have to find applicable bits that would make up those particular shortfalls.

My particular focus and interest has been the n8x0 for a long time now...more so than my time spent puttering with the 770 and n900 combined...the n900 simply works imho (compared to the n8x0)...so what's to fiddle with? and the complexity level of the fiddling with the n900 system with it's cameras and serious telephony isn't very fiddilicious ..more nail-biting to poke around and mess with stuff.
and my feeling for my 770 is more sentimental...
whereas my n8x0's are a constant source of fascination for me.

Having at least one person who is "the go-to-guy" for the 770 sub-forums is a serious need here. Your interest RIDD fits the bill.
You may not get alot of people posting or asking questions all the time but they still show up asking...for example...you are...
Keeping the torches lit in the lowest levels of the grand laboratory is an honourable position. If your love for the charm of the old "Betsy's" of the maemo world (the 770) is strong enough...it isn't a chore...it's simply fun.
So consider it. I'll happily come on down and chat and help how I can ...I always read and sometimes respond to what posts come out of the 770 and n8x0 subforums. So don't think you'd be writing stuff nobody reads...eh? There are still a few 770 users here..quiet bunch though...Just means you wouldn't be ... you are shooting higher ...so more a power-user...devel even...
oooohhh!
speaking of which...if you don't know about it...I do think I mentioned it somewhere...the last time I did any devel for the 770 was a loooonnng time ago and I used this guy's work to get scratch set up it was 2007 he for scratchbox...should still work..maybe a tweak here or there...but it should be sound still. You could try using one of my pre-made pre-set-up distros and implement it easily ...(though I haven't tried this method for the 770...so you would be doing something never done before...sound exciting? ) You could try engineering a proper stable turbo-esque version for the 770...and that isn't all...lotsa stuff you could do...
um ...let me find the link..I have it somewhere here...
aha.
https://nokia770hacker.wordpress.com...er-edition-he/
that should help in setting up a proper environment.
If you bash it into one of my altered distros...you probably won't have to do ALL the instructions at this link ...just tweak a little ..redirect a little...click a couple of buttons... and let it set itself up.
Alot easier than doing it all yourself.
and if you can get a stable 2007 he set up in scratch...no reason why you can't get the more unpolished 2008 he set up in scratch...
and hence possibly work a variation of turbo that would function on the 770...