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# Slot Capabilities

Constants that you use to get the slot-related capabilities of the PCI device.

## Topics

### Capabilities

[`kIOPCISlotCapabilitiesBitAttentionButtonPresent`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitAttentionButtonPresent)

The bit that indicates whether an attention button for this slot is electrically controlled by the chassis.

[`kIOPCISlotCapabilitiesBitPowerControllerPresent`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitPowerControllerPresent)

The bit that indicates whether the slot implements a software programmable power controller.

[`kIOPCISlotCapabilitiesBitMRLSensorPresent`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitMRLSensorPresent)

The bit that indicates whether the chassis for this slot implements an MRL sensor.

[`kIOPCISlotCapabilitiesBitAttentionIndicatorPresent`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitAttentionIndicatorPresent)

The bit that indicates whether the chassis electrically controls the attention indicator.

[`kIOPCISlotCapabilitiesBitPowerIndicatorPresent`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitPowerIndicatorPresent)

The bit that indicates whether chassis electrically controls the power indicator.

[`kIOPCISlotCapabilitiesBitHotPlugSurprise`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitHotPlugSurprise)

The bit that indicates whether the adaptor might be removed without prior notification.

[`kIOPCISlotCapabilitiesBitHotPlugCapable`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitHotPlugCapable)

The bit that indicates whether the slot supports hot-plug operations.

[`kIOPCISlotCapabilitiesBitElectromechanicalInterlockPresent`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitElectromechanicalInterlockPresent)

The bit that indicates whether the chassis implements an electromechanical interlock for this slot.

[`kIOPCISlotCapabilitiesBitNoCommandCompletedSupport`](/documentation/PCIDriverKit/kIOPCISlotCapabilitiesBitNoCommandCompletedSupport)

The bit that indicates whether the slot generates a software notification when the Hot-Plug controller finishes a command.


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