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# Answer to Question #260119 in Electrical Engineering for nit

Question #260119

Explain the instruction format in detail as per the no of address in the instruction with examples?

1
2021-11-03T04:39:02-0400

Instruction size = 32-bit

Number of instruction n = 98

a. number of bits for opcode

"ceil\\left(\\log{n}\\right)"

"ceil\\left(\\log{98}\\right)"

7 bits for opcode will be required

b.

number of bit in operand = (number of bit for instruction) - (bit required in opcode)

"32 - 7 = 25"

= 25 bits

c.

since there is only one Address and operand bit in instruction are 25

"\\therefore maximum\\ memory\\ address\\ that\\ can\\ be \\ can\\ be\\ accessed \\ is\\ 2^{25}"

d.

yes it is because

In 7 bit opcode "2^7" = 128 instruction possible, but only 98 instructions are used in this set.

Total number of instruction may additionally use = "\\left(128\\ -\\ 98\\right)" "= 30"

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