📝 Arithmetic Group of Instructions of SAP-III Computer

Q1. What is the opcode binary pattern for the ADD instruction in the SAP‑III instruction set?

💡 Difficulty: easy | ✅ Correct: B

Q2. Why does SAP‑III use a separate mode field for addressing rather than embedding it in the opcode?

💡 Difficulty: medium | ✅ Correct: C

Q3. A programmer writes the following SAP‑III code: ADD R1, [100]; SUB R1, #5. Which addressing modes are used respectively?

💡 Difficulty: hard | ✅ Correct: A