Hardware Questions

Yes, it can be used, if an accurate clock frequency  is not required. also the component cost is low compared to LC or Crystal.

In 8086 Carry flag, Parity flag, Ausiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sing flag.

The address bus is unidirectional because the address information is always given by the micro processoe  to address a memory location of an input / output devices.

stack is portion of RAM used for saving the content of Program Counter and general purpose registers.

LIFO stacks, also known as "push down" stacks, are the conceptually simplest way of saving information in a temporary storage location for such common computer operations as mathematical expression evaluation and recursive subroutine calling.

An interrupt which can be never be turned off (ie. disabled) is known as Non-Maskable interrupt

Code, Data, Stack, Extra Segment registers in 8086.

In case of Move A to B it will move whatever the value of A into B.It mean it will move numeric, alphanumeric and alphabatic value.

In case of COMPUTE B=A it will assign the value of A into B. But in case of compute only numeric value will be compute.

Execution Unit receives program instruction codes and data from BIU, executes these instructions and store the result in general registers.