windows-xp/Source/XPSP1/NT/base/mvdm/wow16/system/timer.inc

;/************************************************************************
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;* 		< SYSTEM Application Program  >				*
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;------------------------------ Module Header ------------------------------;
; Module Name: Timer interface procedures
;
; Created: 03-08-90 NEC Y.Ueno

INTMASK		EQU	2
TIMODESET	EQU	77H
TICNTSET	EQU	71H
EOI		EQU	20H
EOIPORT		EQU	0
TIMERMASK	EQU	01H

mask macro	code
	cli				; mask timer int
	in	al,02h
	delay	8259,I-O
	or	al,code
	out	02h,al
	jmp	$+2
	sti
	endm

unmask macro	code
	cli				; mask timer int
	in	al,02h
	delay	8259,I-O
	and	al,not code
	out	02h,al
	jmp	$+2
	sti
	endm