Final Exam control unit is typically used for with a large sumber of instruction
ID: 3915119 • Letter: F
Question
Final Exam control unit is typically used for with a large sumber of instructions like b. Hardwired 2. What part of CPU decodes the opcode? a ALU b. PC c. Centrol uit 3. What register connection to the datapath is shown in this figure? a MAR b. MBR c. PC d. IR Control Uni . What instruction is being decoded in this Figure? a. Load b. Store c. Add d Sub 0111 tid isenietm 5. Variable length instructions are used in which architecture? a. MARIE b. MIPS c. ARM d. Intel A computer has 16-bit instructions and 5-bit addresses. If we only want to have two-address instructions, how many 2-address instructions can be foomulated? 6. a. 256 b. 128 c. 1024 d. 64Explanation / Answer
Below are the answers which are possible to answer in given time frame.
Answer of 1.
(A) Microprogrammed
A Microprogrammed control unit stores programms in a special contol memory and are based on flowcharts. Because of their simplicity they are replaceable and ideal and used for large number of instructions.
Answer Of 2.
(C) Control Unit
When memory is read, the data first goes to the MBR. If the data is an
instruction it gets moved to the Instruction Register. The IR has two parts:
1. IR (opcode)
2. IR (address)
The most significant bits of the instruction make up the opcode.Opcode tells the cpu what to do.In IR (opcode) instruction gets decoded and executed by the Control Unit.
Answer Of 4.
(D) Intel
Each member of the x86 family of Intel architectures is known as a CISC (Complex Instruction Set Computer) machine. CISC machines have a large number of instructions of variable length, with
complex layouts. So, we can say that variable instructions are used in Intel architecture.
Answre Of 6.
(D) 64
5 bit two address instruction will reserved 10 bit of instruction and remaining 6 bits (16-10) will be used for opcode.
Total number of opcode/ 2-address that can be generated from 6 bit is 2^6 = 64
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