Computer Input and Output

new(prenominal) info is origin onlyy recorded in a form that is acceptable to the reckoner L Magnetic sign character light (MICE) C Optical character recognition (OCCUR) This approach is called SOURCE DATA AUTOMATION tertiary basic way to enter data into the reckoner is to key it into an online key driven widget. CIA fourth alternative permits data input in audible form, utilise a voice recognition building block of measurement. Input Options theme data Key to memorialize Machine electronic computer readable data OCCUR docs MICE Keyboard Terminals MICE, OCCUR unit of measurements Card, tape, phonograph record Units Chain Nell Voice Recognition mainframe create offers similar options.Information or data bottom of the inning be recorded on a permanent medium, such(prenominal) as root, microfilm, or punched cards, or the information can be displayed on a television uniform screen or resented audibly. OUTPUT options Chain Nell patsy information Termini al Display Plot computer Output Microfilm Microfilm Microfilm Im printing machine Card punch Unit Punch card game Viewer Channels and construe Snits The control unit contains the logic circuitry and remembering needed for the control of triplex 1/0 devices. The line of work contains the logic circuitry and storage needed to monitor several 1/0 device control units and provide pathways to and from the CPU.Role of Channels and Control Control Units High Speed Control unit Low Speed Jinni 1/0 Devices Channels and Control Units The transfer of data between the 1/0 unit, he control unit, and the channel is serial, or one byte at a time. When this cognitive process is performed, the CPU can process other data in original storage. The CHIP halts processing equitable long enough to enter the data from the channel. The breakage of the program in process is very apprize because all of the bytes from the channel atomic number 18 transmitted to primary storage at once-?in parallel. The transfe r of data from primary storage to an 1/0 unit works in the reverse sequence.Smaller computers have alone one channel larger systems have many. vastness of the channels 0 Easy to overlook, but without them CPU reference would be drastically reduced. C The channel computer hardw are and the operating system permit the multiprogramming that maximizes computer productivity. Without channels, there COUld be no time manduction or distributed processing, and batch processing would extremely dimmed and costly. SKYDIVER INPUT DEVICES Offline Skydiver Devices The most common input device was the keypunch machine. CLC The first key-to-tape and key-to- plough units utilize conventional magnetic tape reels and hard disks.Offline skydiver Machines Keypunch disk Punch Cards co Zion magnetic Tape Cassette Hard disk floppy disk disk Reader Magnet ICC tape Cassette et ICC disk Floppy disk Magnetic tape cassette Contains 285 Ft. Of polyester. entropy can be recorded at the assiduity of 800 byt es per inch. dexterity approximately 2000 punched cards. Floppy Disk Sizes 5 1/4 inches and 8 inches in diameter. Capacity 2000-8000 punched cards. KEYED MEDIA INPUT UNITS Card- see and punching 0 Card reading speeds of 2000 per minute are not uncommon, but punching speeds are in the range of 100-250 per minute.C Punched cards are used as turned around documents. Punched cards are overly used to track materials as they fertilize through a plant or a distribution network. Floppy disk, Cassette, and Cartridge readers CLC Cassette, and Cartridge readers tapes are produced as a by-product of another consummation Online skydiver devices TWO basic types of keyboard terminal Displays output on a CRT C Prints output on round-the-clock motif form. Online skydiver devices CRT terminal- also called an ALPHANUMERIC demonstration TERMINAL and a VIDEO DISPLAY TERMINAL, is all electronic, noiseless, and economical.C Can display information very rapidly, cream the screen with characters mu ch faster than the characters can be printed on the paper. Special features CLC Color C Reverse movie 0 Blinking CLC Cursor L Scrolling C Paging C defend format Hard copy terminal also known as TELEPROMPTER TERMINAL, is a terminal with paper output TWO basic categories of hardcopy terminal C impress -? causes a print hammer to strike the paper to form the character Monomaniac causes characters to be printed by style of some chemical or heat process, or by spraying the characters on the paper from an ink jet.