16 Bit Arithmetic Instructions | 8085 Microprocessor

1. INR  Rp

Rp 

BC ≡ B

DE ≡ D

HL ≡ H

Instruction word size  ⇒   1 Byte

Operation ⇒ When this instruction will execute the content of Register pair Rp will increase by 1 and the final result will store in the Register pair Rp.

[Rp] ← [Rp] + 1LSB

Addressing Mode ⇒ Register Addressing Mode

 

2. DCX   Rp

Rp 

BC ≡ B

DE ≡ D

HL ≡ H

Instruction word size  ⇒   1 Byte

Operation ⇒ When this instruction will execute the content of Register pair Rp will decrease by 1 and the final result will store in the Register pair Rp.

[Rp] ← [Rp] − 1LSB

Addressing Mode ⇒ Register Addressing Mode

 

Note: INX and DCX instructions will not affect the status of any flag.

 

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