📝 Display Write Inhibit/Blanking of 8279

Q1. Which pin on the 8253 is designated as the ground terminal?

💡 Difficulty: easy | ✅ Correct: A

Q2. A microcontroller wants to load a count value into counter 1 while keeping other counters unchanged. Which combination of control signals should be asserted?

💡 Difficulty: medium | ✅ Correct: A

Q3. In a system, the CPU needs to read the current count of counter 2 while also ensuring that the write inhibit (blanking) feature prevents any accidental writes during the read. Which control signal states achieve this operation?

💡 Difficulty: hard | ✅ Correct: A