Question

Write branching addresses of vectored hardware interrupt with their priority.

Answer 1

In computer architecture, vectored hardware interrupts use a specific memory address (the "vector") to point the CPU to the correct Interrupt Service Routine (ISR). When multiple devices request service, the Priority Encoder or Interrupt Controller determines which address is sent to the CPU first.

The specific addresses and priorities depend entirely on the processor architecture. Below are the layouts for two of the most common foundational systems: the 8085 Microprocessor and the x86 (PC) Architecture. 8085 Microprocessor (Fixed Vectors)

The 8085 is the classic example of hardware-vectored interrupts with a hardcoded priority logic.

Interrupt	Priority	Vector Address (Hex)	Trigger Method
TRAP	1 (Highest)	0024H	Edge & Level
RST 7.5	2	003CH	Rising Edge
RST 6.5	3	0034H	Level
RST 5.5	4	002CH	Level
INTR	5 (Lowest)	Externally Supplied	Level