Question

Answer the following with respect to hardware interrupts of 8085 Microprocessor:

1. List all interrupts.
2. Specify the highest and lowest priority interrupts.
3. Specify whether maskable or Non-maskable interrupt.

Answer 1

The 8085 microprocessor provides five hardware interrupts:

1. List of all interrupts:
   • TRAP
   • RST 7.5
   • RST 6.5
   • RST 5.5
   • INTR
2. Highest and lowest priority interrupts:
   • Highest Priority: TRAP
   • Lowest Priority: INTR
     TRAP > RST 7.5 > RST 6.5 > RST 5.5 > INTR
3. Maskable or non-maskable interrupt:
   • TRAP → Non-maskable
   • RST 7.5 → Maskable
   • RST 6.5 → Maskable
   • RST 5.5 → Maskable
   • INTR → Maskable