I have been playing a Zelda II rom via Nestopia on my mac, up until the hidden palace in which it becomes all jumbled and looks like this:

When I first ran Zelda, it said something about being a "Bad Dump" file or something along those lines - but the game continued to run great until this moment. I ran it on Rocknes and it didn't seem to come up with the same "Bad Dump" error like Nestopia did.  So I figured I could just run the game in Rocknes and continue where I left off - much to my surprise I could not, and when you save within the game it does not save to the actual rom file.

So here is my predicament.
How can I continue my saved game from Nestopia to Rocknes in hopes that it will not jumble up the hidden palace? OR how can I fix the rom in order to continue playing through the hidden palace? OR should I just try and beat the palace despite not being able to distinguish anything?

Thanks.