Discuss the advantages and disadvantages of the three ways an application program can interact with I/O devices (see Figure 15.2). Describe the actions taken (until the beginning of the execution of...

Discuss the advantages and disadvantages of the three ways an application program can

interact with I/O devices (see Figure 15.2).

Describe the actions taken (until the beginning of the execution of ISR) by the processor

in response to an interrupt int 10H. You can assume real mode of operation.