The TRAP in 8085 is equivalent to __________ in 8086.

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  1. RST 01
  2. RST 5 
  3. NMI 
  4. INTR

Answer (Detailed Solution Below)

Option 3 : NMI 
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Detailed Solution

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The TRAP interrupt in the 8085 microprocessor is most closely equivalent to the 3) NMI (Non-Maskable Interrupt) in the 8086 microprocessor.

Explanation:

  • TRAP (8085):
    • It is a non-maskable interrupt, meaning the programmer cannot disable it.
    • It has the highest priority among all interrupts.
    • It is typically used for critical events like power failures or hardware errors.
  • NMI (8086):
    • It is also a non-maskable interrupt.
    • It also has a high priority, though not necessarily the absolute highest.
    • It is used for similar critical events as the TRAP interrupt.

Here's why the other options are incorrect:

  • RST 01 & RST 5 (8085):
    • These are restart interrupts in the 8085, which are software interrupts or maskable hardware interrupts.
  • INTR (8086):
    • This is a maskable interrupt in the 8086, meaning it can be disabled.

Therefore, the closest equivalent to the TRAP interrupt in the 8085 is the NMI interrupt in the 8086.

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