struc	DevAddrPacketStr
{
	.Size			db	10H		;16 bytes
	.Reserve0		db	0H
	.TransBlockNum		db	?
	.Reserve1		db	0
	.TransBufAddr		dd	?
	.TransLBAAddr		dq	?
}

; structure definition helper
macro	struct	name
{	virtual at 0
   	name name
   	sizeof.#name = $ - name
   	name equ sizeof.#name
   	end virtual 
}


macro	INT13H
{
	pushf
	call	dword ptr cs:Old13H
}

macro	JMP13H
{
	jmp	dword ptr cs:Old13H
}