Memory Address Calculation in Computer

This type of question often appears in the software designer examination (for example, the software designer examination question in the second half of 2013)

The address number ranges from H to bffffh, and the size of the address is () kb. If the memory chip of 16 K * 4 bit is used to form the memory, a () disk is required.

First of all, we should be very familiar with this. Generally, numbers ending with H usually refer to hexadecimal numbers. in hexadecimal notation, a 10 B 11 and so on .....

We can calculate the memory capacity in this way.

= Bffff-80000 + 1

= C00000-80000

= (C-8) * 16 ^ 4

= 4*16 ^ 4 = 4*2 ^ 16

Because 1kb = 2 ^ 10bit

So = 4*2 ^ 6 = 256kb

You can also calculate = 40000 (hexadecimal) = 4*16 ^ 4 (decimal) in hexadecimal notation)

Therefore, the memory capacity is (256) kb.

Because the memory is encoded by byte, 256/8 = 32, so 32 pieces are required.

Memory Address Calculation in Computer