When READing OUT an array of character data, the values are bit-reversed, in addition to being subtracted from the preceding character. This table shows the bit-reversed version of the ASCII character set.
00 | 80 | 40 | C0 | 20 | A0 | 60 | E0 | 10 | 90 | 50 | D0 | 30 | B0 | 70 | F0 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
00 | nul | soh | stx | etx | eot | enq | ack | bel | bs | tab | lf | vt | ff | cr | so | si |
08 | dle | dc1 | dc2 | dc3 | dc4 | nak | syn | etb | can | em | sub | esc | fs | gs | rs | us |
04 | ! | " | # | $ | % | & | ' | ( | ) | * | + | , | - | . | / | |
0C | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | : | ; | < | = | > | ? |
02 | @ | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O |
0A | P | Q | R | S | T | U | V | W | X | Y | Z | [ | \ | ] | ^ | _ |
06 | ` | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o |
0E | p | q | r | s | t | u | v | w | x | y | z | { | | | } | ~ | del |
Once you've looked up a character's bit-reversed value, you can subtract it from the bit-reversed value of the previous character to determine the value to output. For example, to output an "N" when the last character output was "I": the value of "N" is 72 in the table (note that the 16s digits are listed on top, and the ones digits to the left). Subtract this from 92, the value of "I", to give a difference of 20, or #32 in decimal.
Here is the same table, but ordered by value instead of by ASCII:
00 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | A0 | B0 | C0 | D0 | E0 | F0 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
00 | nul | bs | eot | ff | stx | lf | ack | so | soh | tab | enq | cr | etx | vt | bel | si |
02 | @ | H | D | L | B | J | F | N | A | I | E | M | C | K | G | O |
04 | ( | $ | , | " | * | & | . | ! | ) | % | - | # | + | ' | / | |
06 | ` | h | d | l | b | j | f | n | a | i | e | m | c | k | g | o |
08 | dle | can | dc4 | fs | dc2 | sub | syn | rs | dc1 | em | nak | gs | dc3 | esc | etb | us |
0A | P | X | T | \ | R | Z | V | ^ | Q | Y | U | ] | S | [ | W | _ |
0C | 0 | 8 | 4 | < | 2 | : | 6 | > | 1 | 9 | 5 | = | 3 | ; | 7 | ? |
0E | p | x | t | | | r | z | v | ~ | q | y | u | } | s | { | w | del |
The TriINTERCAL dialects introduce a number of new unary operators using bases other than 2. Since these are unfamiliar in the extreme to most programmers, truth tables for all INTERCAL operators have been provided below.
In the case of the what XOR operator, which is not commutative after base 2, the left and top digits correspond to the more and less significant digits, respectively.
V | 0 | 1 | & | 0 | 1 | ? | 0 | 1 | ||
---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | ||
1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 |
V | 0 | 1 | 2 | & | 0 | 1 | 2 | @ | 0 | 1 | 2 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | ||
1 | 1 | 1 | 2 | 1 | 0 | 1 | 2 | 1 | 1 | 1 | 1 | ||
2 | 2 | 2 | 2 | 2 | 0 | 2 | 2 | 2 | 0 | 1 | 2 |
? | 0 | 1 | 2 | ^ | 0 | 1 | 2 | |
---|---|---|---|---|---|---|---|---|
0 | 0 | 2 | 1 | 0 | 0 | 1 | 2 | |
1 | 1 | 0 | 2 | 1 | 1 | 2 | 0 | |
2 | 2 | 1 | 0 | 2 | 2 | 0 | 1 |
V | 0 | 1 | 2 | 3 | & | 0 | 1 | 2 | 3 | @ | 0 | 1 | 2 | 3 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | ||
1 | 1 | 1 | 2 | 3 | 1 | 0 | 1 | 2 | 3 | 1 | 1 | 1 | 1 | 1 | ||
2 | 2 | 2 | 2 | 3 | 2 | 0 | 2 | 2 | 3 | 2 | 0 | 1 | 2 | 3 | ||
3 | 3 | 3 | 3 | 3 | 3 | 0 | 3 | 3 | 3 | 3 | 0 | 1 | 3 | 3 |
2@ | 0 | 1 | 2 | 3 | ? | 0 | 1 | 2 | 3 | ^ | 0 | 1 | 2 | 3 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 0 | 0 | 0 | 3 | 2 | 1 | 0 | 0 | 1 | 2 | 3 | ||
1 | 1 | 1 | 2 | 1 | 1 | 1 | 0 | 3 | 2 | 1 | 1 | 2 | 3 | 0 | ||
2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 0 | 3 | 2 | 2 | 3 | 0 | 1 | ||
3 | 0 | 1 | 2 | 3 | 3 | 3 | 2 | 1 | 0 | 3 | 3 | 0 | 1 | 2 |
V | 0 | 1 | 2 | 3 | 4 | & | 0 | 1 | 2 | 3 | 4 | @ | 0 | 1 | 2 | 3 | 4 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 3 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | ||
1 | 1 | 1 | 2 | 3 | 4 | 1 | 0 | 1 | 2 | 3 | 4 | 1 | 1 | 1 | 1 | 1 | 1 | ||
2 | 2 | 2 | 2 | 3 | 4 | 2 | 0 | 2 | 2 | 3 | 4 | 2 | 0 | 1 | 2 | 3 | 4 | ||
3 | 3 | 3 | 3 | 3 | 4 | 3 | 0 | 3 | 3 | 3 | 4 | 3 | 0 | 1 | 3 | 3 | 4 | ||
4 | 4 | 4 | 4 | 4 | 4 | 4 | 0 | 4 | 4 | 4 | 4 | 4 | 0 | 1 | 4 | 4 | 4 |
2@ | 0 | 1 | 2 | 3 | 4 | 3@ | 0 | 1 | 2 | 3 | 4 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 0 | |
1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 1 | |
2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 2 | |
3 | 0 | 1 | 2 | 3 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | |
4 | 0 | 1 | 2 | 4 | 4 | 4 | 0 | 1 | 2 | 3 | 4 |
? | 0 | 1 | 2 | 3 | 4 | ^ | 0 | 1 | 2 | 3 | 4 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 4 | 3 | 2 | 1 | 0 | 0 | 1 | 2 | 3 | 4 | |
1 | 1 | 0 | 4 | 3 | 2 | 1 | 1 | 2 | 3 | 4 | 0 | |
2 | 2 | 1 | 0 | 4 | 3 | 2 | 2 | 3 | 4 | 0 | 1 | |
3 | 3 | 2 | 1 | 0 | 4 | 3 | 3 | 4 | 0 | 1 | 2 | |
4 | 4 | 3 | 2 | 1 | 0 | 4 | 4 | 0 | 1 | 2 | 3 |
V | 0 | 1 | 2 | 3 | 4 | 5 | & | 0 | 1 | 2 | 3 | 4 | 5 | @ | 0 | 1 | 2 | 3 | 4 | 5 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 3 | 4 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | ||
1 | 1 | 1 | 2 | 3 | 4 | 5 | 1 | 0 | 1 | 2 | 3 | 4 | 5 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
2 | 2 | 2 | 2 | 3 | 4 | 5 | 2 | 0 | 2 | 2 | 3 | 4 | 5 | 2 | 0 | 1 | 2 | 3 | 4 | 5 | ||
3 | 3 | 3 | 3 | 3 | 4 | 5 | 3 | 0 | 3 | 3 | 3 | 4 | 5 | 3 | 0 | 1 | 3 | 3 | 4 | 5 | ||
4 | 4 | 4 | 4 | 4 | 4 | 5 | 4 | 0 | 4 | 4 | 4 | 4 | 5 | 4 | 0 | 1 | 4 | 4 | 4 | 5 | ||
5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 0 | 1 | 5 | 5 | 5 | 5 |
2@ | 0 | 1 | 2 | 3 | 4 | 5 | 3@ | 0 | 1 | 2 | 3 | 4 | 5 | 4@ | 0 | 1 | 2 | 3 | 4 | 5 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 4 | 0 | ||
1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 4 | 1 | ||
2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 4 | 2 | ||
3 | 0 | 1 | 2 | 3 | 4 | 5 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | ||
4 | 0 | 1 | 2 | 4 | 4 | 5 | 4 | 0 | 1 | 2 | 3 | 4 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | ||
5 | 0 | 1 | 2 | 5 | 5 | 5 | 5 | 0 | 1 | 2 | 3 | 5 | 5 | 5 | 0 | 1 | 2 | 3 | 4 | 5 |
? | 0 | 1 | 2 | 3 | 4 | 5 | ^ | 0 | 1 | 2 | 3 | 4 | 5 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 5 | 4 | 3 | 2 | 1 | 0 | 0 | 1 | 2 | 3 | 4 | 5 | |
1 | 1 | 0 | 5 | 4 | 3 | 2 | 1 | 1 | 2 | 3 | 4 | 5 | 0 | |
2 | 2 | 1 | 0 | 5 | 4 | 3 | 2 | 2 | 3 | 4 | 5 | 0 | 1 | |
3 | 3 | 2 | 1 | 0 | 5 | 4 | 3 | 3 | 4 | 5 | 0 | 1 | 2 | |
4 | 4 | 3 | 2 | 1 | 0 | 5 | 4 | 4 | 5 | 0 | 1 | 2 | 3 | |
5 | 5 | 4 | 3 | 2 | 1 | 0 | 5 | 5 | 0 | 1 | 2 | 3 | 4 |
V | 0 | 1 | 2 | 3 | 4 | 5 | 6 | & | 0 | 1 | 2 | 3 | 4 | 5 | 6 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
1 | 1 | 1 | 2 | 3 | 4 | 5 | 6 | 1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | |
2 | 2 | 2 | 2 | 3 | 4 | 5 | 6 | 2 | 0 | 2 | 2 | 3 | 4 | 5 | 6 | |
3 | 3 | 3 | 3 | 3 | 4 | 5 | 6 | 3 | 0 | 3 | 3 | 3 | 4 | 5 | 6 | |
4 | 4 | 4 | 4 | 4 | 4 | 5 | 6 | 4 | 0 | 4 | 4 | 4 | 4 | 5 | 6 | |
5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 5 | 0 | 5 | 5 | 5 | 5 | 5 | 6 | |
6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 0 | 6 | 6 | 6 | 6 | 6 | 6 |
@ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 2@ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | |
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | |
2 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
3 | 0 | 1 | 3 | 3 | 4 | 5 | 6 | 3 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | |
4 | 0 | 1 | 4 | 4 | 4 | 5 | 6 | 4 | 0 | 1 | 2 | 4 | 4 | 5 | 6 | |
5 | 0 | 1 | 5 | 5 | 5 | 5 | 6 | 5 | 0 | 1 | 2 | 5 | 5 | 5 | 6 | |
6 | 0 | 1 | 6 | 6 | 6 | 6 | 6 | 6 | 0 | 1 | 2 | 6 | 6 | 6 | 6 |
3@ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 4@ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 4 | 0 | 0 | |
1 | 1 | 1 | 2 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 4 | 1 | 1 | |
2 | 2 | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 4 | 2 | 2 | |
3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 3 | |
4 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | |
5 | 0 | 1 | 2 | 3 | 5 | 5 | 6 | 5 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | |
6 | 0 | 1 | 2 | 3 | 6 | 6 | 6 | 6 | 0 | 1 | 2 | 3 | 4 | 6 | 6 |
5@ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | ? | 0 | 1 | 2 | 3 | 4 | 5 | 6 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 3 | 4 | 5 | 0 | 0 | 0 | 6 | 5 | 4 | 3 | 2 | 1 | |
1 | 1 | 1 | 2 | 3 | 4 | 5 | 1 | 1 | 1 | 0 | 6 | 5 | 4 | 3 | 2 | |
2 | 2 | 2 | 2 | 3 | 4 | 5 | 2 | 2 | 2 | 1 | 0 | 6 | 5 | 4 | 3 | |
3 | 3 | 3 | 3 | 3 | 4 | 5 | 3 | 3 | 3 | 2 | 1 | 0 | 6 | 5 | 4 | |
4 | 4 | 4 | 4 | 4 | 4 | 5 | 4 | 4 | 4 | 3 | 2 | 1 | 0 | 6 | 5 | |
5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 3 | 2 | 1 | 0 | 6 | |
6 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 0 | 1 | 2 | 3 | 4 | 5 |
^ | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
---|---|---|---|---|---|---|---|
0 | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
1 | 1 | 2 | 3 | 4 | 5 | 6 | 0 |
2 | 2 | 3 | 4 | 5 | 6 | 0 | 1 |
3 | 3 | 4 | 5 | 6 | 0 | 1 | 2 |
4 | 4 | 5 | 6 | 0 | 1 | 2 | 3 |
5 | 5 | 6 | 0 | 1 | 2 | 3 | 4 |
6 | 6 | 0 | 1 | 2 | 3 | 4 | 5 |