CMIT 100 Input / Output.

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Presentation transcript:

CMIT 100 Input / Output

Basic Computer System Operation Input Process Output Basic Computer System Operation

System Types: Microcomputer Platforms PC (personal computer) Applies to all desktops and laptops, not just Windows systems Platforms Wintel (legacy term for Windows / Intel) OSX Minicomputers Mainframes IOS Android Etc.

Input devices Keyboard Mouse Microphone Input Process Output Allows the user to input commands to the system Keyboard Mouse Microphone

Process CPU – Central processing unit The “Brain” Input Process Output Receives information from input device The “Brain” Processes digital information Binary numbering system 1’s and 0’s

Input Process Output Output devices Receives the information from processor and output it to the user Monitor Printer Speakers

Understands only ones and zeros Input Process Output User interface User interface CPU Understands only ones and zeros Operating system Converts the input from the user into the digital information required by the processor Operating system Converts the ones and zeros processed by the CPU back into an interface understood by the user

“Software that allows the user to interface with the hardware.” Input Process Output Hardware Software Operating system “Software that allows the user to interface with the hardware.”

Operating system Software Files Filenames Software = files Files contain information Executable files (.EXE, .COM, .BAT. .MSI, .DMG) Files accessed by the executables (.DLL, .SYS, .INF) Filenames The extension is indicative of what type of file it is .EXE is executable .DOCX is a Microsoft Word Document Covered more in a future chapter

Temporary and permanent storage OS OS Input Process Output Storage devices Temporary and permanent storage

Figure 1-1 Computer activity consists of input, processing, storage, and output

System storage: Permanent storage “Filing cabinet” Files are stored permanently until deleted or destroyed HDD, CD / DVD, UFD, UHD, SSD When the power to the system is turned off the files remain

System storage: Temporary storage “Desktop” Files are opened, or executed, from the filing cabinet (permanent storage) and placed on the desktop (temporary storage) by the operating system, where they are accessed by the user System RAM, random access memory When the power to the system is turned off, the files on the desktop are erased In reality, the operating system opens a copy of the file from the permanent storage device and places it in temporary storage… the original file remains