[amp_mcq option1=”Interrupt vector is supplied via the external bus” option2=”Interrupt vector is supplied via the peripherals” option3=”NMI gets started” option4=”Interrupt gets acknowledge from peripheral” correct=”option1″]
The correct answer is: A. Interrupt vector is supplied via the external bus.
In mode 1, the Z80 fetches the interrupt vector from the external bus. The interrupt vector is a 16-bit address that points to the interrupt service routine. The interrupt service routine is a program that is executed when an interrupt occurs.
The other options are incorrect because:
- Option B is incorrect because the interrupt vector is not supplied via the peripherals.
- Option C is incorrect because the NMI (non-maskable interrupt) is not started in mode 1.
- Option D is incorrect because the interrupt is not acknowledged from the peripheral in mode 1.
I hope this helps! Let me know if you have any other questions.