This little gem seemed to slip by without any notice.
Assembly Code!!! my goodness!
http://www.theregister.co.uk/2012/04/18/prince_of_persia_source_code/
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2012, April 18 - 12:59am
#1
Prince of Persia source code released
Comments
2012, April 18 - 3:28am
#2
The code is still Ubisoft's?! That means that back in the 1980s, Brøderbund must have gotten ALL the rights, which carried over to Ubi after the untimely consolidation and breakup of Mattel Interactive.
2012, April 19 - 1:38am
#3
Someone emailed this news to me. It's very exciting! Do you think a level editor will be made? Years ago, I dreamt of making custom maps... 
2012, April 19 - 3:27am
#4
It's possible, and since it's not making an unofficial PoP port, it could be done with enough ability.
This also means a Mac OS X Universal copy could be made.
2012, April 19 - 3:22pm
#5
A win for software preservation and software openness! I have a lot of respect for Jordan Mechner, and I loved playing PoP back in the day on my Mac Plus.
If you haven't seen his book on how he developed the game, I recommend it there's a free sample available at his blog here.
2012, April 22 - 4:15pm
#6
Where to get the source code:
https://github.com/jmechner/Prince-of-Persia-Apple-II