Character Codes
| Perforator | Teleprinter | Binary | Decimal | ||
| Letter shift |
Figure shift |
Letter shift |
Figure shift |
||
| P | 0 | P | 0 | 00000 | 0 |
| Q | 1 | Q | 1 | 00001 | 1 |
| W | 2 | W | 2 | 00010 | 2 |
| E | 3 | E | 3 | 00011 | 3 |
| R | 4 | R | 4 | 00100 | 4 |
| T | 5 | T | 5 | 00101 | 5 |
| Y | 6 | Y | 6 | 00110 | 6 |
| U | 7 | U | 7 | 00111 | 7 |
| I | 8 | I | 8 | 01000 | 8 |
| O | 9 | O | 9 | 01001 | 9 |
| J | J | 01010 | 10 | ||
| Pi | Figure shift | 01011 | 11 | ||
| S | S | " | 01100 | 12 | |
| Z | Z | + | 01101 | 13 | |
| K | K | ( | 01110 | 14 | |
| Erase(1) | Letter shift | 01111 | 15 | ||
| Blank Tape(2) | (no effect) | 10000 | 16 | ||
| F | F | $ | 10001 | 17 | |
| Theta | Carriage return | 10010 | 18 | ||
| D | D | ; | 10011 | 19 | |
| Phi | Space | 10100 | 20 | ||
| H | + | H | £ | 10101 | 21 |
| N | - | N | , | 10110 | 22 |
| M | M | . | 10111 | 23 | |
| Delta | Line feed | 11000 | 24 | ||
| L | L | ) | 11001 | 25 | |
| X | X | / | 11010 | 26 | |
| G | G | # | 11011 | 27 | |
| A | A | - | 11100 | 28 | |
| B | B | ? | 11101 | 29 | |
| C | C | : | 11110 | 30 | |
| V | V | = | 11111 | 31 | |
1. Erase is represented by an asterisk (“*”) in the
simulator. When this character is output, it sets the teleprinter
into letter shift.
2. Blank tape is represented by a period (“.”). This
character has no effect on output.
3. The personal computer text environment has only a
“newline” character. On the Edsac simulator, the
line-feed character is interpreted as a newline character, and
carriage returns are thrown away.
4. The symbols theta, phi, delta and pi are typed as @, !, &
and #, respectively.