The Telegraph and The Digital Revolution
Contents
The Telegraph
| А (A) / 1 | ▄▄ | Ј (J) | ▄▄▄▄▄▄▄▄▄▄▄▄ | L (R) / 0 | ▄▄▄▄▄▄▄▄ |
| Ҩ (AU) | ▄▄▄▄▄▄▄▄ | К (K) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Ѕ (S) / 5 | ▄▄▄▄▄▄▄▄▄▄ |
| Б (B) / 9 | ▄▄▄▄▄▄▄▄▄▄▄▄ | Л (L) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Z (SJ) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ |
| З (C) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Љ (LL) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Т (T) / 6 | ▄▄▄▄▄▄ |
| Δ (D) | ▄▄▄▄▄▄▄▄▄▄▄▄ | М (M) | ▄▄▄▄▄▄▄▄▄▄▄▄ | И (U) | ▄▄▄▄▄▄▄▄▄▄▄▄ |
| Е (E) / 2 | ▄▄▄▄ | Н (N) / ! | ▄▄▄▄▄▄▄▄▄▄ | В (V) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ |
| Є (EU) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Њ (NG) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Ѡ (W) | ▄▄▄▄▄▄▄▄▄▄ |
| F (F) / . | ▄▄▄▄▄▄ | О (O) / 4 | ▄▄▄▄▄▄▄▄ | Р (X) / 8 | ▄▄▄▄▄▄▄▄▄▄ |
| Г(G) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | П (P) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Y (Y) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ |
| Ƕ (H) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Ь (Q) / ? | ▄▄▄▄▄▄▄▄▄▄ | С (Z) / 3 | ▄▄▄▄▄▄ |
| І (I) / , | ▄▄▄▄ | Ҍ (QJ) | ▄▄▄▄▄▄▄▄▄▄▄▄▄▄ | Ҫ (ZJ) | ▄▄▄▄▄▄▄▄▄▄ |
| ツ / 7 | ▄▄▄▄▄▄▄▄ | つ / 〶 | ▄▄▄▄▄▄▄▄▄▄▄▄ | (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. The shift code (▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄) had multiple functions. A single shift code switches between letters, and numbers and punctuation, while two starts and end a transmission blocks.
After the radio telegraph became standard on ships and boats, two special codes was agreed upon, the emergency code (4 or 5 unbroken shift codes), and the attention code (3 unbroken Ҩ (AU) codes).
- 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
