Consider an Intel 80386DX microprocessor-based system using a 32-bit external da
ID: 3852338 • Letter: C
Question
Consider an Intel 80386DX microprocessor-based system using a 32-bit external data bus. a. Complete the memory structure (below) using the 4 banks. Clearly denote the bank enable signals that are used to enable each bank. You ma y use bus notation for the address and data bus lines going to each bank. Please note that. instead of using A0 and A1, the proper notation for the bank enable signal is BE_0, BE_1, BE_2, and BE_3, (all active low, and controlled by the 80386). Clearly note which data lines go to which memory banks. Which bank enable lines would be enabled for... b. A byte from an address that is divisible by 4? c. a word that starts at an address that is divisible by 2, but not 4? (show some examples to figure this out!) c. a double word that starts at an odd address? Two accesses would be required-why?Explanation / Answer
a)
BE0 data line goes to memory bank 0
BE1 data line goes to memory bank 1
BE2 data line goes to memory bank 2
BE03 data line goes to memory bank 3
b)