Explanation:

The 8085 microprocessor has 6 interrupt control lines used to handle interrupts.

These are:

1. TRAP – Non-maskable, highest priority interrupt
2. RST7.5 – Maskable, vectored interrupt
3. RST6.5 – Maskable, vectored interrupt
4. RST5.5 – Maskable, vectored interrupt
5. INTR – Maskable, non-vectored interrupt
6. INTA – Interrupt acknowledge (not an interrupt request, but used in the interrupt process)

Summary:

• 5 are interrupt request lines.
• 1 is interrupt acknowledge.
• So, total = 6 interrupt control lines.