Difference between revisions of "The Telegraph and The Digital Revolution"
Koppadasao (talk | contribs) (→Pulse Width Modulation Code) |
Koppadasao (talk | contribs) m |
||
Line 2: | Line 2: | ||
== The Telegraph == | == The Telegraph == | ||
− | |||
{| class="wikitable" align="right" | {| class="wikitable" align="right" | ||
|- | |- | ||
Line 29: | Line 28: | ||
| 7 || {{dash}}{{dot}}{{dot}} || (SHIFT) || {{dash}}{{dash}}{{dash}}{{dash}}{{dash}} || || | | 7 || {{dash}}{{dot}}{{dot}} || (SHIFT) || {{dash}}{{dash}}{{dash}}{{dash}}{{dash}} || || | ||
|} | |} | ||
+ | === Pulse Width Modulation Code === | ||
The Illomi telegraph system used a pulse with modulated character code akin to [[W:Morse code|Morse code]], though the codes used are based upon letter frequency in [[Delang]]. A shift code ({{dash}}{{dash}}{{dash}}{{dash}}{{dash}}) switches between letters and numbers and punctuation, and each transmission blocks are separated by two shift characters. | The Illomi telegraph system used a pulse with modulated character code akin to [[W:Morse code|Morse code]], though the codes used are based upon letter frequency in [[Delang]]. A shift code ({{dash}}{{dash}}{{dash}}{{dash}}{{dash}}) switches between letters and numbers and punctuation, and each transmission blocks are separated by two shift characters. |
Revision as of 14:43, 5 May 2019
Contents
The Telegraph
А/1 | ▄▄ | Ј | ▄▄▄▄▄▄▄▄▄▄▄▄ | L/0 | ▄▄▄▄▄▄▄▄ |
Ҩ | ▄▄▄▄▄▄▄▄ | К | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Ѕ/5 | ▄▄▄▄▄▄▄▄▄▄ |
Б/9 | ▄▄▄▄▄▄▄▄▄▄▄▄ | Л | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Z | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ |
З | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Љ | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Т/6 | ▄▄▄▄▄▄ |
Δ | ▄▄▄▄▄▄▄▄▄▄▄▄ | М | ▄▄▄▄▄▄▄▄▄▄▄▄ | И | ▄▄▄▄▄▄▄▄▄▄▄▄ |
Е/2 | ▄▄▄▄ | Н/(!) | ▄▄▄▄▄▄▄▄▄▄ | В | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ |
Є | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Њ | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Ѡ | ▄▄▄▄▄▄▄▄▄▄ |
F/(.) | ▄▄▄▄▄▄ | О/4 | ▄▄▄▄▄▄▄▄ | Р/8 | ▄▄▄▄▄▄▄▄▄▄ |
Г | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | П | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Y | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ |
Ƕ | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Ь/(?) | ▄▄▄▄▄▄▄▄▄▄ | С/3 | ▄▄▄▄▄▄ |
І/(,) | ▄▄▄▄ | Ҍ | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Ҫ | ▄▄▄▄▄▄▄▄▄▄▄▄ |
7 | ▄▄▄▄▄▄▄▄ | (SHIFT) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ |
Pulse Width Modulation Code
The Illomi telegraph system used a pulse with modulated character code akin to Morse code, though the codes used are based upon letter frequency in Delang. A shift code (▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄) switches between letters and numbers and punctuation, and 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
▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄ ▄▄ ▄▄▄▄▄▄ ▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ ▄▄ ▄▄▄▄ ▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
- Ex: SHIFT SHIFT T H I S SPACE I S SPACE A SPACE T E S T SHIFT 1 2 3 SHIFT SHIFT
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
Third Generation Computers
- transistor based digital computers
Fourth Generation Computers
- integrated circuit based digital computers