An operand and an address

A decoder and an accumulator

Sequence register and decoder

None of these

Devices have 8-bit addresses

Devices are accessed using IN and OUT instructions

There can be a maximum of 256 input devices and 256 output devices

Arithmetic and logic operations can be directly performed with the I/O data.

absolute

immediate

indirect

Relative

Direct memory access

Vectoring the interrupt

System Interrupt

Cycle stealing

1

2

3

None of these