> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/pnp.4.md).

# pnp.4

`pnp` — 对“即插即用”（PnP）ISA 设备的支持

## 名称

`pnp`

## 描述

`pnp` 驱动枚举系统中支持“Plug and Play ISA Specification”的 ISA 设备。它为每个设备分配 ISA 总线资源（中断线、DMA 通道、I/O 端口和内存区域）并激活它。

如果不能在不与系统中其他设备冲突的情况下为 PnP ISA 设备分配所需资源，该设备将不会被激活，并且对程序不可用。

## 参见

[pnpbios(4)](https://github.com/FreeBSD-Ask/freebsd-man-sc/tree/main/man4/pnpbios.4.i386.md)

## 标准

> Intel, Microsoft, "Plug and Play ISA Specification, Version 1.0a", May 5, 1994.

> "Clarifications to the Plug and Play ISA Specification, Version 1.0a", December 10, 1994.

## 历史

`pnp` 驱动首次出现于 FreeBSD 2.2.5。在后续版本中进行了大幅更新。

## 作者

PnP 支持最初由 Luigi Rizzo 为 FreeBSD 2.2.5 编写，基于 Sujal Patel 的初始工作。

## 注意事项

无法禁用单个 PnP ISA 设备。`pnp` 驱动会找到所有符合 PnP ISA 规范的设备并尝试全部激活它们。

无法显式地为 PnP ISA 设备分配特定资源。资源分配是完全自动的，没有手动覆盖的规定。


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://book.bsdcn.org/man/man4/pnp.4.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.