I found some interesting pages on NES Zelda bugs/glitches, and oddities, that we may not yet be implementing.
Ganon
This one is obvious. Our Ganon is not NES accurate:
http://ifs.nog.cc/kobe-ug.hp.infosee...elda_ganon.htm
Video
Spoiler: show
NES Glitches
Some topics on NES glitches that we may not be emulating:
http://www.glitchgamer.com/the-legend-of-zelda-nes
Bugs
A Bug that Allows Quickly Skipping to the Ending:
https://www.digitaltrends.com/gaming...to-the-ending/
This one may only affect the FDS version, that IMO, we should eventually support as a module.
Behaviour
Finally, some trivia and NES behaviour that we may not have down pat:
https://www.gamefaqs.com/boards/5634...3969876?page=1
Patra
Apparently, we are not the only ones with issues on boss coding:
https://www.youtube.com/watch?v=83iAiwhQQF8
This may be an emulation bug.
Clearly, none of this is mission-critical to 2.54+ versions of ZC, but we might want to consider implementing it (perhaps with scripts), in the Z1 module.