INT 21 - Novell NetWare - OPEN SEMAPHORE (OLD) AX = F220h subfn 00h CX = length of request buffer in bytes DX = length of reply buffer in bytes DS:SI -> request buffer (see #02280) ES:DI -> reply buffer (see #02281) Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h) SeeAlso: AH=F2h"Novell",AX=C500h,AX=F220h/SF=01h,AX=F220h/SF=03h