Microprocessor
When RET instruction is executed by any subroutine then
the PC will be incremented after the execution of the instruction.
the top of the stack will be popped out and assigned to the PC.
without any operation, the calling program would resume from instruction immediately following the call instruction.
without any operation, the calling program would resume from instruction immediately following the call instruction and also the PC will be incremented after the execution of the instruction.
While the microprocessor is executing a program an interface circuit takes over control of address, data, control buses when not in use by microprocessor
DMA controller taking over the address, data and control buses while a block of data is transferred between memory and I/O device
Data transfer takes place between the I/O device and memory during every alternate clock cycle
The DMA control waiting for the microprocessor to finish execution of the program and then takes over the buses
EXAMIANS