INT 2F U - DOS 3+ internal - MARK ALL DISK BUFFERS UNREFERENCED
AX = 120Eh
SS = DOS DS (must be using a DOS internal stack)
Return: DS:DI -> first disk buffer
Note:   clears "referenced" flag on all disk buffers
SeeAlso: AX=1210h,INT 21/AH=0Dh

See also: 2F1209

2F120E - DOS 3+ internal - MARK ALL DISK BUFFERS UNREFERENCED