---
title: update
framework: kernel
role: pseudoSymbol
path: kernel/iolocalconfigdirectory/1812690-update
---

# update

## Declaration

```occ
virtual IOReturn update(
 UInt32 offset,
 const UInt32 *&romBase); 
```

## Return Value

Return Value kIOReturnSuccess if the specified offset is now accessable at romBase[offset].

## Overview

Overview makes sure that the ROM has at least the specified capacity, and that the ROM is uptodate from its start to at least the specified quadlet offset.