Microprocessor Interfacing and Embedded System

An array of LEDs as connected below, is needed to be accessed by the 8255a interfacing. 0 Al AD 0 80H PORTA . 81H PORTB 82H PORTC 183H CINTROL REGISTER *The LED array connected to Port A will light up if the input string is a Palindrome Memory addresses A1 wth Port A Practise problem 8086 A2 w Logic? CS AZ 8255A (a) Find the value of A0 to A7 in order to address port A and control register (b) Find the logic circuit in order to keep chip select low while accessing control register and port A (c) Construct the code segment in order to keep the LED array blinking on and off in an infinite loop. Initialize the 8255a as needed. Use 99h as the control word. Provide comments wherever necessary 18 2/2020 18 8255 Interfacing Part 4 Hints to identify palindrome *The LED array connected to Port A will light up if the input string is a Palindrome LEA DI, Array2+3 ; Ending address of Destination LEA SI, Array1 ; Starting address of Source Practise problem MOV CX, 4 ; Number of elements = 100 bytes CLD ; set Sl and Di to auto-increment Next: MOVSB SUB DI, 2 ; adjust Di to pint at next address LOOP Next