---
title: deviceMemoryWrite
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iopcidevice/4359884-devicememorywrite
---

# deviceMemoryWrite

## Declaration

```occ
virtual IOReturn deviceMemoryWrite(uint8_t memoryIndex, uint64_t offset, uint64_t data, uint8_t size, IOOptionBits options);
```