Logical Group

7/29/2019 Logical Group

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The Instructions under this group perform logicaloperation such as AND, OR, compare, rotate etc.

Examples are: ANA, XRA, ORA, CMP, and RAL etc.

LOGICAL GROUP


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ANA R

(Logically AND content of register with Acc and result in A )

[A] [A] ^ [r]Example:

ANA C (AND the content of C with A).Suppose the Data at C register is 10H.

Initially C= 10H, A=10H

After execution A= 10H, C=10H.

LOGICAL GROUP


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ANI Data

(Logically AND immediate data with Acc and result in A )

[A] [A] ^ [data]Example:

ANI 10 (AND the data with A).Suppose the Data is 10H.

Initially Data = 10H, A=10H

After execution Data = 10H, A=10H.

LOGICAL GROUP


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ANA M

(Logically AND content of memory with Acc and result in A )

[A] [A] ^ [M]Example:

ANA M (AND the content of memory with A).Suppose the content of memory is 10H.

Initially M=10H, A = 10H

After execution M=10H, A = 10H

.

LOGICAL GROUP


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LOGICAL GROUP

ORA R

(Logically OR register content with Acc and result in A)

[A] [A] v [r]Example:

ORA C (OR the content of C with A).

Suppose the Data at C register is 17H.

Initially C= 17H, A=10H

After execution C= 17H, A=17H


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LOGICAL GROUP

ORI Data

(Logically OR immediate Data with Acc and result in A ).

[A] [A] v [Data]Example:

ORI 17 (OR the Data with A).

Suppose the Data is 17H.

Initially Data= 17H, A=10H

After execution Data= 17H, A=17H


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LOGICAL GROUP

ORA M

(Logically OR memory content with Acc and result in A).

[A] [A] v [M]Example:

ORA C (OR the content of memory with A).

Suppose the Data at memory is 17H.

Initially M= 17H, A=10H

After execution M= 17H, A=17H


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XRA R

(Logically XOR register content with Acc and result in A)

[A] [A] [r]Example:

XRA C (XOR the content of C with A).

Suppose the Data at C register is 17H.

Initially A=10H,C= 17H

After execution A=07H,C=17H.

LOGICAL GROUP


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XRI Data

(Logically XOR immediate Data with Acc and result in A)

[A] [A] [Data]Example:

XRI 17 (XOR the Data with A).

Suppose the Data is 17H.

Initially A=10H,Data=17H

After execution A=07H,Data=17H.

LOGICAL GROUP


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XRA M

(Logically XOR memory content with Acc and result in A)

[A] [A] [M]Example:

XRA M (XOR the content of memory with A).

Suppose the memory content is 17H.

Initially A=10H,M= 17H

After execution A=07H,M=17H.

LOGICAL GROUP


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CMA.

(Complement the accumulator)

[A] [A]Example:

CMA (Complement the accumulator0

Suppose the Data at accumulator is FFH.

Initially A=FFH

After execution A=00H

LOGICAL GROUP


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LOGICAL GROUP

RLC (Rotate accumulator left)The content of the accumulator is rotated left by one

bit. The seventh bit of the accumulator is moved to carry

bit as well as to the zero bit of the accumulator. Only CS

flag is affected.[An+1] [An], [A0] [A7], [CS] [A7]

A7 A6 A5 A3A4 A1A2 A0CS


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LOGICAL GROUP

RRC. (Rotate accumulator right)

The content of the accumulator is rotated right by one

bit. The zero bit of the accumulator is moved to the

seventh bit as well as to carry bit. Only CS flag is

affected.

[An][An+1] , [CS] [A0] , [A7][A0]



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LOGICAL GROUP

RAL (Rotate accumulator left through carry)

The content of the accumulator is rotated left by one

bit. The seventh bit of the accumulator is moved to carry

bit & carry bit to the zero bit of the accumulator. Only CS

flag is affected.[An+1] [An], [A0] [CS], [CS] [A7]



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LOGICAL GROUP

RAR. (Rotate accumulator right through carry)

The content of the accumulator is rotated right by one

bit. The zero bit of the accumulator is moved to the to

carry bit & carry bit to the seventh bit. Only CS flag is

affected.

[An][An+1] , [CS][A0], [A7][CS]


Logical Group

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