PPT-8086 Interrupts

Interrupt Normal prog execution is interrupted by Some external signal or A special instruction in the prog In response to an interrupt the mp stops executing its normal prog amp. An Integrated Approach to Architecture and Operating Systems. Chapter 4. Processor Implementation. ©Copyright 2008 Umakishore Ramachandran and William D. Leahy Jr.. Interrupts, Traps and Exceptions. Bus Design. Khaled. A. Al-. Utaibi. alutaibi@uoh.edu.sa. Agenda. Buffering and . Latching. 8086 Bus . System. Bus Timing. Bus . Write . Cycle. Read Cycle. Ready and Wait States. 8086 Bus System . Design. Mutual Exclusion with Hardware Support. Thomas Plagemann. With slides from. Otto J. Anshus & Tore Larsen. (University of Tromsø). and Kai Li. (. Princeton University. ). Overview. Interrupts:. Ganesh Pitchiah. . What’s an MCU ?. Frequency = 8 MHz. Time Period = 1/f. = 0.125 us . Code for Switching LED. int a; . // . Define . variable . Tami Meredith, Ph.D.. CSCI 3431. Why?. Devices need CPU access. E.g., NIC has a full buffer it needs to empty. These device needs are often asynchronous and unrelated to the currently executing process. Design of Microprocessor-Based Systems. Mark Brehob. University of Michigan. Lecture 6 & 7: Interrupts (please bring slides again on Thursday). January 26. th. & 28. th. . Exceptions. , Traps, Faults . Khaled A. Al-Utaibi. alutaibi@uoh.edu.sa. Agenda. The 8086 Registers. The 8086 Memory Addressing. The 8086 Memory Organization. Data Registers. : . The data group consists of the . AX. , . BX. , . Interrupt Handling. David Ferry, Chris Gill. CSE 522S - Advanced Operating Systems. Washington University in St. Louis. St. Louis, MO 63130. 1. Why Interrupts?. Interrupts allow a currently executing process to be preempted. for. “ADVANCED . MICROPROCESSORS”. Visit. www.tijubaby.weebly.com. for complete notes (5modules). 2. EVOLUTION . OF. MICROPROCESSORS. . 500BC. BABYLONIANS. -ABACUS. 3. 1642. BLAISE PASCAL. CALCULATING MACHINERY BY GEARS AND WHEELS. Interrupts . Read . Almy. , . Chapters . 17 – 19. . . Homework #9 and Lab #9 due next week.. Exam #2 next week.. An . interrupt. is a mechanism for causing a program to temporarily suspend what it’s doing, and do something else instead.. External. ?. . 8086 . vs. 8088. 16_bit Data Bus. 20_bit Address. 8_bit Data Bus. . . 20_bit Address. 8088. 8086. Only external bus of 8088 is . 8bit. Pin configuration:. 8086/8088 Busses. Address Bus. Hitesh Lad. Ch:1 . Introduction . to Microprocessors. . Typical requirements of architecture: Batch Processing , Multiprogramming , Time sharing & Multitasking Systems ; . Intel . 8086 architecture , Internal Operation , Addressing Modes , Intel 8086 Configurations-Minimum Mode and brief introduction of Maximum Mode , Intel 8086 System Connections , System Bus Timing . disable interrupts // Must finish put on queue of threads waiting for lock set guard to 0 call switch enable interrupts else value BUSY guard 0 LockRelease Why disable interrupts N “Self-Belief | Self Discipline | Self Respect”. Department of Electronics and communication Engineering. Subject Name : MICROPROCESSOR AND MICROCONTROLLER. Presentation Title: INTERFACING THE LED USING 8086 MICROPROCESSOR.