Difference between revisions of "The Telegraph and The Digital Revolution"

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* numbers 1-5 is 1 to 5 dots, while 6 to 9 is one dash and 1 to 4 dots. zero is two dashes
 
* numbers 1-5 is 1 to 5 dots, while 6 to 9 is one dash and 1 to 4 dots. zero is two dashes
 
*:1 {{dot}}, 2 {{dot}}{{dot}}, 3 {{dot}}{{dot}}{{dot}}, 4 {{dot}}{{dot}}{{dot}}{{dot}}, 5 {{dot}}{{dot}}{{dot}}{{dot}}{{dot}}, 6 {{dash}}{{dot}}, 7 {{dash}}{{dot}}{{dot}}, 8 {{dash}}{{dot}}{{dot}}{{dot}}, 9 {{dash}}{{dot}}{{dot}}{{dot}}{{dot}}, 0 {{dash}}{{dash}}
 
*:1 {{dot}}, 2 {{dot}}{{dot}}, 3 {{dot}}{{dot}}{{dot}}, 4 {{dot}}{{dot}}{{dot}}{{dot}}, 5 {{dot}}{{dot}}{{dot}}{{dot}}{{dot}}, 6 {{dash}}{{dot}}, 7 {{dash}}{{dot}}{{dot}}, 8 {{dash}}{{dot}}{{dot}}{{dot}}, 9 {{dash}}{{dot}}{{dot}}{{dot}}{{dot}}, 0 {{dash}}{{dash}}
 +
* punctuations: PERIOD/BREAK {{dot}}{{dash}}, COMMA {{dash}}, QUESTION MARK {{dash}}{{dash}}{{dot}}, EXCLAMATION MARK {{dash}}{{dot}}{{dash}}
  
 
== The Digital Revolution ==
 
== The Digital Revolution ==

Revision as of 15:25, 5 November 2018

 This article is a stub.
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P history.png History portal

The Telegraph

Pulse Width Modulation Code

  • akin to Morse code
  • based upon letter frequency in Delang
  • a shift character code switches between letters and numbers and punctuation
    • each transmission blocks are separated by two shift characters
      Ex: SHIFT SHIFT T H I S SPACE I S SPACE A SPACE T E S T SHIFT 1 2 3 SHIFT SHIFT
  • numbers 1-5 is 1 to 5 dots, while 6 to 9 is one dash and 1 to 4 dots. zero is two dashes
    1 ▄▄, 2 ▄▄▄▄, 3 ▄▄▄▄▄▄, 4 ▄▄▄▄▄▄▄▄, 5 ▄▄▄▄▄▄▄▄▄▄, 6 ▄▄▄▄▄▄, 7 ▄▄▄▄▄▄▄▄, 8 ▄▄▄▄▄▄▄▄▄▄, 9 ▄▄▄▄▄▄▄▄▄▄▄▄, 0 ▄▄▄▄▄▄▄▄
  • punctuations: PERIOD/BREAK ▄▄▄▄▄▄, COMMA ▄▄▄▄, QUESTION MARK ▄▄▄▄▄▄▄▄▄▄, EXCLAMATION MARK ▄▄▄▄▄▄▄▄▄▄

The Digital Revolution

The First Computers

  • electro-mechanical digital computers
  • wire based digital internal storage using PWMC
    • the digital storage was constructed using a mechanical telegraph key as output, a long coiled string, and a pickup transducer to pick up the signal
    • required a refresh circuit
  • no external digital storage

Second Generation Computers

  • mostly electronically digital computers
  • removable magnetic wire coil external storage using PWMC
    • wire coil strung from one spindel to another through a magnetic read/write head

Zero Deliminated Character Code

  • binary stream based digital storage
  • based upon Pulse Width Modulation Code
  • shift character codes switches between lower case, upper case, numbers, punctuation, and codes
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