Microprocessor 8085 Instructions

Instructions of 8085 can be classified on three basis: 

First Classification on basis of their byte length i.e. size of instruction.

1. 1-byte instructions

2. 2-byte instructions

3. 3-byte instructions

Second Classification on basis of their addressing modes i.e. kinds of approaches to fetch and execute.

1. Register Addressing

2. Immediate Addressing

3. Direct Addressing

4. Register Indirect Addressing

5. Implicit Addressing

There are five sets of instructions for 8085mp  Programming: 

1. Data Transfer group

2. Arithmetic group

3. Logical group

4. Branching group

5. Machine Control group