INT 21 - Novell NetWare - LOCK LOGICAL RECORD SET                               
	AX = F26Ch
	CX = length of request packet in bytes
	DX = 0000h (no reply packet)
	DS:SI -> request packet (see #02479)
	ES:DI ignored
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F20Ah,AX=F26Ah,AH=CBh"NetWare"


Format of NetWare "Lock Logical Record Set" request packet:
Offset	Size	Description	(Table 02479)
 00h	BYTE	lock flag
		00h shareable lock
		01h exclusive lock
 01h	WORD	lock timeout in clock ticks (0000h = don't wait)