Question

Given the 8 bit value 10101101 stored in a
register,
what
are
microinstructions
required in order to :

(i) Clear to 0 the first 4 bits
(ii) Set to 1 the last 4 bits
(iii) Complement the first 4 bits​

Answer 1

Answer:

Here is how to register the 8 bit value

Explanation:

Micro instruction completely depends upon the architecture of microprocessor. But I am writing here general one:

Suppose 10101101 is stored in register R, then

(i) AND R, 11110000

(ii) OR R, 00001111

(iii) NOT R, 01010010

The CPU (Central Processing Unit) of a computer is the microprocessor. It is the computer's brain. Since the Intel 8085 is one of the most widely used 8-bit microprocessors, we shall describe it here.

The 1977-designed Intel 8085 is an 8-bit, NMOS microprocessor.

It is configured as follows:

A single LSI chip was used to construct the 40 pin I.C. package.

The Intel 8085 operates off of a single +5Vd.c supply.

The average clock speed of an Intel 8085 is 3 MHz, with a 320 ns clock cycle.

Data bus of 8 bits.

There is a 16-bit address bus that can address a 64 KB 16-bit stack pointer.

16 bit PC (Program Counter)

Six 8-bit registers are set up in pairs as follows:

B, D, and H

used Intel 8085

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