DevHlp_GetIRQMask

Description

Retrieve the mask state of an IRQ level.

This function reads the current IRQ mask state for the specified IRQ.

Parameters
Specified IRQ level.

Exit
EAX=0, mask disabled (IRQ enabled).
EAX=1, mask enabled (IRQ disabled)

Assembly language

 ;       dh_GetIRQMask - Retrieve a specified IRQ mask state
 ;
 ;       This function reads the current IRQ mask state for the specified IRQ.
 ;
 ;       ENTRY   AL = IRQ
 ;
 ;       EXIT-SUCCESS
 ;           EAX - 0 = mask disabled (IRQ enabled)
 ;               - 1 = mask enabled (IRQ disabled)
 ;
 ;       EXIT-FAILURE
 ;           NONE
 ;

   MOV     AL,IRQ whose mask state is to be retrieved
   MOV     DL,DevHlp_GetIRQMask
   CALL    DevHlp
   JC      Error

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