10. Programmable Keyboard and Display Interface: 8279 - An Introduction To Microprocessor 8085

Q1. A system needs to generate a periodic interrupt using counter 0. Which pin should be connected to the interrupt line?

💡 Difficulty: easy | ✅ Correct: A

Q2. To write a mode word that configures counter 1 for square‑wave operation, which combination of control signals must be active? Use 0 for low and 1 for high.

💡 Difficulty: medium | ✅ Correct: A

Q3. If GATE2 is mistakenly wired to the same line as OUT1, what functional problem is most likely to occur?

💡 Difficulty: hard | ✅ Correct: C