---
title: IOTimeStampStartConstant
framework: kernel
role: symbol
role_heading: Function
path: kernel/1535234-iotimestampstartconstant
---

# IOTimeStampStartConstant

## Declaration

```occ
void IOTimeStampStartConstant(unsigned int csc, uintptr_t a, uintptr_t b, uintptr_t c, uintptr_t d);
```

## See Also

### Timers

- [IOTimerEventSource](kernel/iotimereventsource.md)
- [IOWatchDogTimer](kernel/iowatchdogtimer.md)
- [IOGetTime](kernel/1575332-iogettime.md)
- [IOTimeStampConstant](kernel/1535203-iotimestampconstant.md)
- [IOTimeStampEndConstant](kernel/1535232-iotimestampendconstant.md)