> For the complete documentation index, see [llms.txt](https://docs.hex-rays.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hex-rays.com/9.0sp1/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/697.md).

# op\_plain\_offset

Convert operand to an offset (for the explanations of 'ea' and 'n' please see [op\_bin](/9.0sp1/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/696.md)()) base - base of the offset as a linear address If base == BADADDR then the current operand becomes non-offset Example: seg000:2000 dw 1234h and there is a segment at paragraph 0x1000 and there is a data item within the segment at 0x1234: seg000:1234 MyString db 'Hello, world!', 0 Then you need to specify a linear address of the segment base to create a proper offset: op\_plain\_offset(to\_ea("seg000", 0x2000), 0, 0x10000); and you will have: seg000:2000 dw offset MyString Motorola 680x0 processor have a concept of "outer offsets". If you want to create an outer offset, you need to combine number of the operand with the following bit:

\#define OPND\_OUTER 0x80 // outer offset base // Please note that the outer offsets are meaningful only for // Motorola 680x0.

success op\_plain\_offset(long ea, int n, long base);


---

# 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 by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.hex-rays.com/9.0sp1/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/697.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.
