7/26/2019 8085 Interrupts (for Classroom Discussion)

1/31

Interrupts in 8085

7/26/2019 8085 Interrupts (for Classroom Discussion)

2/31

8085A Pin diagram and Signals(Recall)

7/26/2019 8085 Interrupts (for Classroom Discussion)

3/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

4/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

5/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

6/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

7/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

8/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

9/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

10/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

11/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

12/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

13/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

14/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

15/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

16/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

17/31

Ill t ti E l N t d

7/26/2019 8085 Interrupts (for Classroom Discussion)

18/31

Illustrative Example on Non-vectoredInterrupt

Write a main program to count continuously

in binary with a one-second delay betweeneach count.

Write a service routine at XX70H to fash FFHve times when the program is interrupted

with some appropriate delay between eachfash.

MAIN PRORAMXX00H !X" #$XX%%HXX0&H '"XX0(H )*" +00HXX0,H 'X/ 1 $23XX04H )*" 506H

XX0+H 5+!! '!+8 !!

Illustrative Example on Non vectored

7/26/2019 8085 Interrupts (for Classroom Discussion)

19/31

Illustrative Example on Non-vectoredInterrupt

SER"I#E RO$%INEXX70H $1#H :XX76H $1#H $#WXX7;H )*" :0+HXX7(H )*" +00HXX7,H F!+#H/ 1 $23

XX74H )*" 506HXX7+H 5+!! '!+8XX7H 5)+XX7'H 52 :

XX7FH 9< F!+#HXX4;H $$ $#WXX4&H $$ :XX4(H '"XX4=H 2'

7/26/2019 8085 Interrupts (for Classroom Discussion)

20/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

21/31

Restart Instructions

u t p e nterrupts us ng a r or t&

7/26/2019 8085 Interrupts (for Classroom Discussion)

22/31

u t p e nterrupts us ng a r or t&Encoder

7/26/2019 8085 Interrupts (for Classroom Discussion)

23/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

24/31

8085 Interrupts and "ector locations

7/26/2019 8085 Interrupts (for Classroom Discussion)

25/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

26/31

l 'i ( )

7/26/2019 8085 Interrupts (for Classroom Discussion)

27/31

Accumulator 'it pattern (or SIM )SetInterrupt Mas*+ instruction

Illustrative Examples on Interrupt

7/26/2019 8085 Interrupts (for Classroom Discussion)

28/31

Illustrative Examples on Interruptmas*ing

Write a program to enable all the interrupts

in 404=.

o reset the 7.= interrupt

7/26/2019 8085 Interrupts (for Classroom Discussion)

29/31

7/26/2019 8085 Interrupts (for Classroom Discussion)

30/31

Pending Interrupts

7/26/2019 8085 Interrupts (for Classroom Discussion)

31/31