---
title: "setCommandBlock(IOMemoryDescriptor *)"
framework: kernel
role: pseudoSymbol
path: kernel/iofirewiresbp2orb/1813109-setcommandblock
---

# setCommandBlock(IOMemoryDescriptor *)

Sets the command block portion of the ORB.

## Declaration

```occ
virtual IOReturn setCommandBlock(
 IOMemoryDescriptor *memory ); 
```

## Parameters

- `memory`: IOMemoryDescriptor representing the command block buffer.

## Return Value

Return Value Returns KIOReturnSuccess if the command block was updated successfully.

## Overview

Overview Copys the data provided in the buffer to the command block portion of the ORB.

## See Also

### Miscellaneous

- [allocatePageTable](kernel/iofirewiresbp2orb/1812982-allocatepagetable.md)
- [deallocatePageTable](kernel/iofirewiresbp2orb/1812989-deallocatepagetable.md)
- [getCommandBufferDescriptor](kernel/iofirewiresbp2orb/1812997-getcommandbufferdescriptor.md)
- [getCommandFlags](kernel/iofirewiresbp2orb/1813002-getcommandflags.md)
- [getCommandGeneration](kernel/iofirewiresbp2orb/1813010-getcommandgeneration.md)
- [getCommandTimeout](kernel/iofirewiresbp2orb/1813017-getcommandtimeout.md)
- [getLogin](kernel/iofirewiresbp2orb/1813023-getlogin.md)
- [getMaxPayloadSize](kernel/iofirewiresbp2orb/1813031-getmaxpayloadsize.md)
- [getORBAddress](kernel/iofirewiresbp2orb/1813039-getorbaddress.md)
- [getRefCon](kernel/iofirewiresbp2orb/1813049-getrefcon.md)
- [getRefCon64](kernel/iofirewiresbp2orb/1813059-getrefcon64.md)
- [release](kernel/iofirewiresbp2orb/1813072-release.md)
- [releaseCommandBuffers](kernel/iofirewiresbp2orb/1813085-releasecommandbuffers.md)
- [setBufferConstraints](kernel/iofirewiresbp2orb/1813096-setbufferconstraints.md)
- [setCommandBlock(void *, UInt32)](kernel/iofirewiresbp2orb/1813121-setcommandblock.md)
- [setCommandBuffers](kernel/iofirewiresbp2orb/1813129-setcommandbuffers.md)
- [setCommandBuffersAsRanges(IOMemoryDescriptor *, UInt32, UInt32)](kernel/iofirewiresbp2orb/1813141-setcommandbuffersasranges.md)
- [setCommandBuffersAsRanges(IOVirtualRange *, UInt32, IODirection, task_t, UInt32, UInt32)](kernel/iofirewiresbp2orb/1813149-setcommandbuffersasranges.md)
- [setCommandBuffersAsRanges64](kernel/iofirewiresbp2orb/1813162-setcommandbuffersasranges64.md)
- [setCommandFlags](kernel/iofirewiresbp2orb/1813178-setcommandflags.md)
- [setCommandGeneration](kernel/iofirewiresbp2orb/1813197-setcommandgeneration.md)
- [setCommandTimeout](kernel/iofirewiresbp2orb/1813211-setcommandtimeout.md)
- [setMaxPayloadSize](kernel/iofirewiresbp2orb/1813231-setmaxpayloadsize.md)
- [setRefCon](kernel/iofirewiresbp2orb/1813244-setrefcon.md)
- [setRefCon64](kernel/iofirewiresbp2orb/1813262-setrefcon64.md)