# u3b user exit

The u3b user exit returns information about the port.

## Syntax

```
line.status = oconv(code, ’u3b’)
```

## Parameter(s)

| line.status | Port information. |
| --- | --- |
| code | Single character that describes the type of information requested, followed by the port number to examine. |
| a | Returns the ABS base FID. |
| c | Returns the CPU units currently used. |
| h | Returns the number of pages printed. |
| l | Returns the current return stack. |
| p | Returns decimal PCB FID. |
| s | Returns the hexadecimal PIB status code. |

 Note:
 When getting the CPU units, it is necessary to first perform an execute
 of:

```
tcl {line} {user} charges
```

 to synchronize the charges value.

## Example(s)

```
result= oconv("c":46, ’u3b’)
print result
188
```

 The current CPU charges for port 46 is 188 units.

## See also

- [charges command](https://d3codex.com/tcl/charges-command/)
- [where command](https://d3codex.com/tcl/where-command/)

---
Source: https://d3codex.com/pickbasic-flashbasic/u3b-user-exit/ - part of the D3Codex reference.