Frogger is a thing as I've been playing it for half a year.
This is what Rusty Pixels had to say about it:
Warhawk 2 may well happen.
Frogger is working in rams. Just Jim Bagley and I need to bang heads and get it finished. We will this year
Hunchback being three Signetics 2650s is a crimp that's for sure. I'm a little confused by the extra notes about the game also being available for the Galaxians / Donkey Kong hardware. Does that mean there was a Z80 version? Or they modded the pcb for Signetics 2650?
Someone feeling really frisky might try emulating the Signetics 2650 and success would depend a lot on how much of the frame time is taken by the game code. I plan to try that with some 6502 arcade games but I have no idea if it will be successful. All for fun -- these things could also be done as hardware cores for the fpga too.
If you don't know about it already, there is also Bubble Bobble which is standalone and not incorporated into RAMS. These things are running the original arcade code and should be using a 60Hz video mode to match the arcade original. Scramble is also very good but it is a port rather than running original code.
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For the system software and hardware, the latest publicly available beta is 3.01.10. There has been work done past that and a final version 3 core is being made. Hopefully it won't be too long until it is available because work can't start on version 4 until this is done.
I take it that is some
but anyway there are 6502 interpreters in the spectrum community but the idea here is to disassemble, translate and reassemble which takes out the interpretation step very much like a basic interpreter versus a basic compiler. So I think with the Z80 at 28MHz, it may be possible to do these old arcades since their 6502s (or other) tended to be clocked at rather low speed. My limited time is already committed however so it may be a while until I can have some fun again 
