---
title: Command Register Bits
framework: pcidriverkit
role: collectionGroup
role_heading: API Collection
path: pcidriverkit/command-register-bits-enum
---

# Command Register Bits

Constants that you use to access specific bits of the command register.

## Topics

### Bits

- [kIOPCICommandIOSpace](pcidriverkit/kiopcicommandiospace.md)
- [kIOPCICommandMemorySpace](pcidriverkit/kiopcicommandmemoryspace.md)
- [kIOPCICommandBusMaster](pcidriverkit/kiopcicommandbusmaster.md)
- [kIOPCICommandSpecialCycles](pcidriverkit/kiopcicommandspecialcycles.md)
- [kIOPCICommandMemWrInvalidate](pcidriverkit/kiopcicommandmemwrinvalidate.md)
- [kIOPCICommandPaletteSnoop](pcidriverkit/kiopcicommandpalettesnoop.md)
- [kIOPCICommandParityError](pcidriverkit/kiopcicommandparityerror.md)
- [kIOPCICommandAddressStepping](pcidriverkit/kiopcicommandaddressstepping.md)
- [kIOPCICommandSERR](pcidriverkit/kiopcicommandserr.md)
- [kIOPCICommandFastBack2Back](pcidriverkit/kiopcicommandfastback2back.md)
- [kIOPCICommandInterruptDisable](pcidriverkit/kiopcicommandinterruptdisable.md)
- [kIOPCICommandBusLead](pcidriverkit/kiopcicommandbuslead.md)

## See Also

### Reading and Writing Configuration Data

- [ConfigurationRead8](pcidriverkit/iopcidevice/configurationread8.md)
- [ConfigurationRead16](pcidriverkit/iopcidevice/configurationread16.md)
- [ConfigurationRead32](pcidriverkit/iopcidevice/configurationread32.md)
- [ConfigurationWrite8](pcidriverkit/iopcidevice/configurationwrite8.md)
- [ConfigurationWrite16](pcidriverkit/iopcidevice/configurationwrite16.md)
- [ConfigurationWrite32](pcidriverkit/iopcidevice/configurationwrite32.md)
- [Configuration Data Offsets](pcidriverkit/configuration-data-offsets-enum.md)
- [Bridge Header Offsets](pcidriverkit/bridge-header-offsets-enum.md)
- [Status Register Bits](pcidriverkit/status-register-bits-enum.md)