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This course will cover I/O interface in Computer Organisations and Architecture section of GATE Exam.

Sweta Kumari is teaching live on Unacademy Plus

Sweta Kumari
YouTuber (channel : GATE NoteBook) | Verified Educator | 2+ year Online Teaching Experience

U
Unacademy user
mam pls provide discrete maths lectures
Sweta Kumari
a year ago
Already created
Shoaib Quserhi
10 months ago
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  1. WELCOME LEARNERS Unacademy, because learning is priceless INDIA'S LARGEST LEARNING PLATFORM unacadem


  2. ABOUT ME FOLLOW M COMPUTER ENGINEER https://unacademy.com/user/hellosonu01 EDUCATOR@ UNACADEMY CONTENT WRITER DOUBT RESOLVER HOME TUTOR QUORA WRITER Sweta Kumari Software Engineer Pursuing M.TECH (CSE) ISelected in 2 IT MNC(Java) Research Paper (NCCCS) IQuora Writer 12+ yr Teaching Exp. IYoutuber 11,614 Views in last 30 days 50,304 Lifetime Views 82 Courses 3.8k Followers 183 Following GOOD ADVISOR


  3. TARGET GATE CSE 2019 unacadem COMPUTER ORGANIZATION & ARCHITECTURE EXPECTED GATE QUESTIONS ON /O INTERFACE (INTERRUPT AND DMA MODE) CPU COMPUTER


  4. https/unacademy.com/user/hellosonuot .. unacademy Home Explore Plus 0 minutes today Search Courses, Topics&Educators 1,015-Credit Sweta Kumari Edit Profile Software Engineer Pursuing M.TECH (CSE) Selected in 2 IT MNC(Java) Research Paper (NCCCS) Quora Writer 12+ yr Teaching Exp. IYoutuber 11,614 Views in last 30 days 50,304 Lifetime Views 82 Courses 3.8k Followers183 Following COMPLETE SYLLABU GATE (CS/IT) - DBMS Learn WEB SERVICES SOFTWARE ENGINEERING In 60 Mautes t. By Sweta Kumari y Sweta Kumari ay Sweta Kumari (Hindi) SQL Joins With Tabular Examples-GATE (CS/IT) (Hindi) Complete Software Engineering in 60 Minutes (Hindi) Web Services Tutorial For Beginners in 60 Minutes


  5. /O Interface (Interrupt and DMA Mode) The method that is used to transfer information between internal storage and external /O devices is known as o interface. TRANSFER INFORMATION INTERNAL STORAGE EXTERNAL I/O DEVICES


  6. HOW CPU IS INTERFACED? The CPU is interfaced using special communication links by the peripherals connected to any computer system These communication links are used to resolve the differences between CPU and peripheral. COMPUTER CPU Special communication links


  7. SPECIAL HARDWARE There exists special hardware components between CPU and peripherals to supervise and synchronize all the input and output transfers that are called interface units. CPU SPECIAL HARDWARE


  8. Data transfer to and from the peripherals may be done in any of the three possible ways 1. Programmed I/O. 2. Interrupt- initiated I/O. 3. Direct memory access( DMA)


  9. PROGRAMMED I/O CPU REGISTER M/M It is due to the result of the I/O instructions that are written in the computer program Each data item transfer is initiated by an instruction in the program. Usually the transfer is from a CPU register and memory. . In this case it requires constant monitoring by the CPU of the peripheral devices.


  10. INTERRUPT- INITIATED I/O SPECIAL COMMANDS INTERRUPT FACILITY Since in the above case we saw the CPU is kept busy unnecessarily. . This situation can very well be avoided by using an interrupt driven method for data transfer. By using interrupt facility and special commands to inform the interface to issue an interrupt request signal whenever data is available from any device. In the meantime the CPU can proceed for any other program execution . . The interface meanwhile keeps monitoring the device. Whenever it is determined that the device is ready for data transfer it initiates an interrupt request signal to the computer. Upon detection of an external interrupt signal the CPU stops momentarily the task that it was already performing, branches to the service program to process the I/O transfer, and then return to the task it was originally performing.