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Input/Output - Coggle Diagram
Input/Output
Major function
processor communication
command decoding
status reporting
address recognition
Device communication
status information
data
commands
Control and timing
Data buffering
Error detection
External device
Category
Machine readable
Communication
Human readable
exchanging data between the external environment and teh computer
Keyboard/Monaitor
Character type
Printable
Control
I/O commands
Test
Read
Control
Write
3 techniques for I/O operations
Interrupt-driven I/O
Direct memory access (DMA)
Programmed I/O
I/O instruction
I/O Mapping
Memory mapped I/O
Isolated I/O
Generis Model of an I/O Module
become buffer between external device with CPU