# fid command

The fid BASIC program displays information
about a memory-resident frame.

**For Windows:**Not Supported

## Syntax

```
fid frame-ID{(options)}
```

## Parameter(s)

| options | n | Outputs report without pausing at the bottom of each page. |
| --- | --- | --- |
| p | Directs output to system printer via the spooler. | |

## Example(s)

```
fid 122
 I i t n b r
w m o o o o a e
t l f w b p t t u
r o r r u h i c s
e c e i s s a h e
q k f t y h q b d
-----------------
0 1 1 0 0 1 0 0 0
A fwdhq fwdaq bckaq buffid btwa
- ------ ------ ------ ------ -------
0 000000 000000 000000 00007A 400CB800
```
In the *vertical columns* above, each of the bit
settings for the given are descriptions of each bit. Any column with
a 0 underneath indicates that the corresponding value is *off*. A nonzero indicates that the value is *on*.

| wtreq | Indicates a write-required state. |
| --- | --- |
| mlock | Indicates a memory-locked (core-locked) state. |
| fref | Indicates that this frame has been referenced recently. |
| iowrit | Indicates that the frame is being written, or is enqueued for writing. |
| iobusy | Indicates that this frame is being read from disk. |
| tophsh | Indicates that this buffer is at the top of the internal memory hash list. |
| notiaq | Indicates that this buffer will soon be gone. |
| batchb | Indicates that this FID was brought into memory by a batch process. |
| reused | Indicates that the buffer is eligible for immediate reuse. |
| Attr | Number of virtual registers attached to this buffer. |
| fwdhq bckaq fwdaq | All pointers to an internal management list. |
| buffid | FID of the buffer. |
| btwa | Indicates the real address of the buffer. |

---
Source: https://d3codex.com/tcl/fid-command/ - part of the D3Codex reference.