Question 2 (a)

A computer system has an 18-bit address bus and can address an 8-bit wide memory. The memory of this computer system contains 48 Kbytes ROM and 2 x 32 Kbytes of RAM (RAM1 & RAM2). All the three memories form a contiguous block of memory starting at address 0. ROM occupies the lowest address range. The rest of the address range after RAM is not used.

(i) Calculate the total addressing capacity in Kbytes of this computer system, including the unused memory zone.

(ii) Draw a memory map for the computer system. Indicate the starting and ending addresses in hexadecimal for each block of memory and any unused space. Show how the memory addresses are obtained.