INT 61 - Banyan VINES - ASYNC TERMINAL EMULATION - SET SCROLL LOCK CHECKING
        AX = 0003h subfn 0Ch
        DS:BX -> argument block (see below)
Return: AX = status (see AX=0003h/SF=00h)
SeeAlso: AX=0003h/SF=00h

Format of argument block:
Offset  Size    Description
 00h    BYTE    session ID (00h)
 01h    BYTE    0Ch (function "set state of scroll lock checking")
 02h    BYTE    check_scroll_lock flag
                00h off
                01h on (display of host data stopped while ScrollLock on)

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