User:Johnburger/Demo/Exec/Alloc/IDT

This module provides a function which modifies an Entry in the Interrupt Descriptor Table.

Note that the IDT should only ever hold System Descriptors - Memory Descriptors in the IDT don't make any sense!

Demo/Exec/Alloc/IDT.inc

;
; Exec/Alloc/IDT.inc
;
 
; This module provides functions to modify the IDT.
 
;-------------------------------------------------------------------------------
; This function modifies an IDT entry.
; Input:  EBX    = IDT Descriptor entry
;         CX:EAX = Selector : Offset of handler
;         DL     = Descriptor Type
; Output: ES, EAX, EDI modified
 
Exec.Alloc.IDT:
                MOV             DI,Selector(Exec.LDT.IDT, LDT, RPL0)
                MOV             ES,DI           ; Point to IDT with ES
 
                CALL            Exec.Alloc.DT.Sys
                RET