Memory Interfacing Using RAM and ROM both with 8085 Microprocessor

Interfacing RAM and ROM both at a time with 8085:


Here ROM with 32 kb and RAM with 64kb has been used.


32kb = 32768bytes   is equal to 
2^15 

and


64kb = 65536bytes  is equal to 2^16 


So it is clear that 15 address lines are required for interfacing of ROM and 16 address lines are required for interfacing of RAM. As we know that there are only 16 address lines in 8085 Microprocessor. But we need 16+15 = 31 lines.


Think!!!!!!!!


How it may be possible???