# t command (PROC processor)

The t command directs output to the
terminal screen and controls special terminal display functions.

## Syntax

```
t {function, function,...}
```

## Parameter(s)

| function | b | Rings the terminal bell. |
| --- | --- | --- |
| c | Clears the terminal screen. | |
| (column,row) | Outputs the value at the column and row coordinates. | |
| in | Outputs ASCII character with an integer value of n. | |
| xn | Outputs ASCII character with integer hexadecimal value of n. | |
| "text" | Outputs literal text. Double quotation marks are required around literal text. | |
| @ | See @() function for a complete listing of the @ functions. | |
| , (comma) | Indicates that this t command is to be continued on the next line. The t command does not insert a carriage return automatically. | |

## Example(s)

Clears the screen, (-1) positions
the cursor at column 20, row 0, and displays the string `Main Menu`.

```
t (-1),(20,0),"Main Menu"
```
Positions the cursor to column 10, row 10, displays the
string `"Chosen"` in reverse video, (-13) and (-14),
and clears to the end of the line (-4).

```
t (10,10),(-13),"Chosen",(-14),(-4)
```

```
s1
ihy
t (0,5),"Is this OK ?"
d1+
t i8,i8
ip?
```
This set of instructions:

- Sets the input buffer pointer to the first position with s1.

- Places a y in the first input buffer position with ihy.

- Outputs the string "Is this OK ?" at column 0, row 5.

- Displays the contents of the first buffer position and holds the cursor with d1+.

- Outputs two backspaces with t i8,i8.

- Prompts for input with ip?. This displays the default value y, backs up the cursor two positions so that it is one character in front of the y and then issues a ? prompt character that places the cursor directly over the y.

```
t c,i7,(10,10),b
```
This statement clears the screen with `c`, rings the bell by issuing a character 7 with `i7`, positions the cursor at column 10, row 10, and rings the bell again
with `b`.

```
t x1b,x8,"exec dir",x0
```
This statement is typically used to control an intelligent
MS-DOS terminal (such as ViaDuct). It sends a *preamble*, consisting of an escape, backspace (`x1b` and `x8`, specified in hexadecimal), then sends the `"exec dir"` command string followed by the end command character `x0`. This statement can be written using integer references:

```
t i27,i8,"exec dir",i0
```

---
Source: https://d3codex.com/proc/t-command-proc-processor/ - part of the D3Codex reference.