View source for DevHelp UnSetIRQ

{{DISPLAYTITLE:DevHelp_UnSetIRQ}}
This service removes the current hardware interrupt handler. 

==Syntax==
===C===
 USHORT APIENTRY DevHelp_UnSetIRQ (USHORT IRQLevel)

===Assembler===
<PRE>
MOV   BX,IRQnum               ; IRQ Interrupt number (0 - F)
MOV   DL,DevHlp_UnSetIRQ

CALL  [Device_Help]
</PRE>

==Parameters==
===C===
; IRQLevel (USHORT) : input - IRQ Interrupt number (0-F)

===Assembler===
 MOV   BX,IRQnum               ; IRQ Interrupt number (0 - F)

==Return Code==

===C===
Success Indicator: 0

Possible errors: Caller does not own the IRQ return code.
===Assembler===
<PRE>
'C' Set if the caller is not the owner or one of the owners of the IRQ.
</PRE>

==Remarks==
DS must point to the data segment of the physical device driver on entry. 

==Example Code==
===C===
<PRE>
#include  "dhcalls.h"

USHORT APIENTRY DevHelp_UnSetIRQ (USHORT IRQLevel)
</PRE>

==Related Functions==

[[Category:DevHlps]]