Saturday, 18 May 2013
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Question No 1 (a):
Marks 5
Problem
Statement:
You are required to design a 4-bit mini-CPU which
will perform 4 operations: ADD, SUB, OR, and AND. The CPU does only
fixed-point, positive number manipulations so you do not have to worry about
negative numbers.
Both data and instructions are loaded from a
single bus which comes from the computer memory. You do not have to worry
about the other end of that bus.
You need to do:
This
is the design of 4-bit mini CPU which has 2 operands, a clock, ALU and
executed output state. You are
required that to fill the asked points (?) in the given diagram with
appropriate function OR operation.
NOTE: Remove question marks (?)
and write correct operations.
Hints:
·
The
count generator resets after every 8 counts.
·
ALU
using ADD, AND, OR and SUB operations.
Q. 1 Question No 1 (b):
Marks 10
Explain the CPU execution with respect to given points (1,2, 3, 4, 5 and 6).
1.
Working of Bit
Counter (definition will not acceptable)
2.
Identify first
then define operation. (definition will not acceptable)
3.
Explain the
working of Program Counter (PC). (definition will not acceptable)
4.
Identify the
total number of bits and then defend your answer. You are required to answer
for both 4-Bit and 8-Bit CPUs.
5&6. Explain the main difference between
MDR and MAR. (definitions will not acceptable)
Question No 2: Marks 5
The given design is for 4-Bit CPU, you
are required to convert it into 8-Bit CPU design.
he memory data register (MDR), known also as memory buffer register (MBR), is used to temporarily store data read from or written to memory whereas the memory address register (MAR) holds the address of the memory location from which data will be read or to which data will be written. All transfers from memory to the CPU go via the MDR.
this is the main difference next u have to explain what will happen in the given OR instructio agar app sirf diagram ko dahky tu Q1 - a part ho jai ga, jahan jahan ? mark hai wahan uploaded file mai sy value fill ker dain. i |
