DCD 80390 core support by Keil compiler

I would like to understand how is the DCD 80390 family supported by the compiler.

How is the code below 64K treated - is the assembly code generated uses 8051 or 80390 instruction sets? Is there is a difference between applications that take are less than 64K and the applications which take more than 64K?


How is the data below and above 64K treated?

Thanks!
Einat