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intd0:	push1	eax,ds,es
	mov	al,00001011b		;¯à®ç¨â âì
	out	20h,al			;ॣ¨áâà
	in	al,20h			;¯à¥à뢠­¨ï.
	test	al,01 shl (0dh-08h)	;¯à®¢¥àª .
	jnz	intd2			;íâ® ¯à¥à뢠­¨¥.
;----------------------------
	in	al,92h			;®âªà®¥¬
	or	al,2			; ¤à¥á­ãî
	out	92h,al			;«¨­¨î A20.
;............................
	lgdt	g cs:[gdt0]		;ª®¬ ­¤  "LGDT".
intd1:	mov	eax,cr0			;¯¥à¥å®¤¨¬
	inc	ax			;¢ § é¨éñ­­ë©
	mov	cr0,eax			;०¨¬.
;............................
	movsr	ds,08			;ᥫ¥ªâ®à DS.
	movsr	es,ds			;ᥫ¥ªâ®à ES.
;............................
	dec	ax			;¯¥à¥ª«îç¨âáï
	mov	cr0,eax                 ;¢ ॠ«ì­ë© ०¨¬.
intd2:	pop1
intde:	jmp	f intd0			;¢ë¯®«­¨¬ ¯à¥à뢠­¨¥.
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