INT 21 - Novell NetWare - OPEN SEMAPHORE                                        
	AX = F26Fh subfn 00h
	CX = length of request buffer in bytes
	DX = length of reply buffer in bytes
	DS:SI -> request buffer (see #02481)
	ES:DI -> reply buffer (see #02482)
Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h)
SeeAlso: AH=F2h"Novell",AX=F26Fh/SF=01h,AX=F26Fh/SF=02h


Format of NetWare "Open Semaphore" request packet:
Offset	Size	Description	(Table 02481)
 00h	BYTE	00h (subfunction "Open Semaphore")
 01h	BYTE	initial semaphore value
 02h	BYTE	length of semaphore's name
 03h  N BYTEs	semaphore name
SeeAlso: #02482


Format of NetWare "Open Semaphore" request packet:
Offset	Size	Description	(Table 02482)
 00h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	semaphore handle
 04h	BYTE	number of clients using semaphore (including caller)
SeeAlso: #02481