2. (30pts) In an 8085 microprocessor based system 6 Kbyte ROM and IKbyte RAM memory is needed. Design a memory decoder circuitry placing the memory ICs into the address ranges shown in the figure. Use only one 74LL138 (3-to-8 decoder) and logic gates if necessary. Write a program to calculate the function f(x,y:)=xXOR(yAND=) where x,y and z are the first 3 contents of the memory locations of the ROM2. Store the f(x,y,z) into the last memory location of the RAM