Maximal index that can be accessed is 256. #8
Description
Since every integer that is treated as a number is an unsigned char, some of the functionality can't be accessed. This includes
- too many builtin functions/variables (which for instance is a case at Spidermonkey).
- inability to access array indices greater than 255.
Proposed solution: include special opcode with one argument (say n), which means that the argument for the next read value will be 256*n + m instead of regular m. For better illustration, look at EXTENDED_ARG opcode from Python 3.6 and above.