INT 21 - Novell NetWare, Alloy NTNX - PRINT SPOOLING
        AH = E0h
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer
Return: AL = status
Note:   this function was added in NetWare 4.0, but is no longer listed in
          current Novell documentation and may no longer be supported
SeeAlso: AH-E3h/SF=68h

Format of request buffer:
Offset  Size    Description
 00h    WORD    length of following data
 02h    BYTE    subfunction
                00h spool data to a capture file
                01h close and queue capture file
                02h set spool flags
                03h spool existing file
                04h get spool queue entry
                05h remove entry from spool queue
 03h    ???

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