only if an interrupt service routine is being executed

only if a bit in the interrupt mask is made 0

only if interrupts have been enabled by an EI instruction

none of these

Data transfer

Process control

Logical

None of these

6800

68000

8080

8088

Shorter than machine cycle time

Larger than machine cycle time

Ten times the machine cycle time

Exactly the same as the machine cycle time

16 bit register that point to stack memory locations

32 bit accumulator

memory location in the stack

flag register used for the stack