---
title: kIOPCICommandFastBack2Back
framework: pcidriverkit
role: symbol
role_heading: Enumeration Case
path: pcidriverkit/kiopcicommandfastback2back
---

# kIOPCICommandFastBack2Back

The bit that enables legacy fast back-to-back transactions.

## Declaration

```occ
kIOPCICommandFastBack2Back
```

## See Also

### 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)
- [kIOPCICommandInterruptDisable](pcidriverkit/kiopcicommandinterruptdisable.md)
- [kIOPCICommandBusLead](pcidriverkit/kiopcicommandbuslead.md)