---
title: kIOInterruptSourceIndexMask
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [driverkit 21.0+, macOS 12.0+]
path: kernel/3753293-anonymous/kiointerruptsourceindexmask
---

# kIOInterruptSourceIndexMask

## Declaration

```occ
kIOInterruptSourceIndexMask = 0x0000FFFF
```