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hi i need help with options d, e and f Question 8. [12] The Motorola 68000 microprocessor is byte addressable with a 24-bit address bus
hi i need help with options d, e and f
Question 8. [12] The Motorola 68000 microprocessor is byte addressable with a 24-bit address bus and a 16-bit data bus, and one word contains 2 bytes. There are both peripherals and memory units to be connected to build a system and it is expected that the whole address space will be used. The diagram below may help you visualize the required answers to the questions. State the answers in the appropriate boxes. Leave the val- ues in the answers as powers of 2 or simple approximations to them or simple factors - there is no need to give the actual number. Page 1 What is the total number of available addresses for peripherals? ments of RAM and ROM. What is the total number of addresses available for memory? (c) The addressable space for peripherals is fur- ther subdivided as shown below. (e) [1] How many addresses are left for RAM? (d) [1]The ROM has already been bought and its size is 16KB. How many addresses does it need? (e) (d) (f) [1] 1/16 of (h) [1] 14/16 of the the addresses addresses are to be are to be used used for disk address- for input com- ing. How many? ponents. How many? (g) [1] 1/16 of the addresses are (h) to be used for output compo- nents. How many? (i) [1] The chosen disk drives each require IMB of address space. How many can one fit into the system? (1) 6) Step by Step Solution
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