Question
Download Solution PDFWhich of the following is a two byte instruction in 8085 microprocessor?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe Correct option is 4
Concept:
MVI:
- MVI is a mnemonic, which actually means “Move Immediately”. With this instruction, we can load a register with an 8-bit or 1-Byte value.
- This instruction supports an immediate addressing mode for specifying the data in the instruction.
- In the instruction “d8” stands for any 8-bit data, and ‘r’ stands for any one of the registers e.g. A, B, C, D, E, H or L. So this r can replace any one of the seven registers.
As ‘r’ can have any of the seven register names, so there are seven opcodes for this type of instruction. It occupies 2-Bytes in the memory.
| Mnemonics Operand | Opcode | Bytes |
| MVIA, Data | 3E | 2 |
| MVI B, Data | 06 | 2 |
| MVI C, Data | 0E | 2 |
| MVI D, Data | 16 | 2 |
| MVI E, Data | 1E | 2 |
| MVI H, Data | 26 | 2 |
| MVI L, Data | 2E | 2 |
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