# OS_ClearIrqCheckFlag

## C Specification

  `#include <nitro/os.h>`
  `void OS_ClearIrqCheckFlag( OSIrqMask intr );`

## Arguments

intr | Shows, as a logical sum, the IRQ interrupt cause that will clear the check flag.

## Return Values

None.

## Description

Clears IRQ interrupt check flags

These flags are normally set by the interrupt handler of each IRQ interrupt. For information on the types of flags, see `OS_SetIrqCheckFlag`.

## See Also

`OS_SetIrqCheckFlag`, `OS_GetIrqCheckFlag`

## Internal Operation

In the ARM9, the predetermined location (`DTCM_END - 8`) in DTCM is designated to be the check flag region. This function operates on this region. In the ARM7, the predetermined location of the ARM7 WRAM (highest address - 8) is designated to be the check flag region. The function operates on this region.

## Revision History

03/08/2005 Standardized Japanese term for "interrupt."
11/02/2004 Deleted `SVC_WaitIntr()` from "See Also."
04/06/2004 Initial version.