INT 21 - Novell NetWare - CLOSE SEMAPHORE (OLD) AX = F220h subfn 04h CX = length of request packet in bytes DX = 0000h (no reply packet) DS:SI -> request packet (see #02286) ES:DI ignored Return: AX = status (see #02860 at INT 2F/AX=7A20h/BX=0000h) SeeAlso: AH=F2h"Novell",AX=C504h,AX=F220h/SF=00h,AX=F220h/SF=01h SeeAlso: AX=F26Fh/SF=01h