📝 Programming in Mode 2 (Strobed Bidirectional Bus I/O)

Q1. What is the hexadecimal opcode for the LDA instruction that loads the accumulator from a memory address in 8085?

💡 Difficulty: easy | ✅ Correct: A

Q2. If an 8085 program needs to read a byte from an I/O device at address 0x5A3F using Mode 2, which sequence correctly forms the address and initiates the read?

💡 Difficulty: medium | ✅ Correct: D

Q3. If the high‑order address byte is 0x3C and the low‑order byte is stored in the IOAR as 0x7A, what is the full 16‑bit I/O address used by the 8085 in Mode 2?

💡 Difficulty: hard | ✅ Correct: A