Bitfields for NOISE.SYS flags:
Bit(s)	Description	)
 0	MS Windows active
 1-5	reserved
 6	clock drift sampling
 7	video retrace drift sampling
 8	network access sampling (not implemented yet in 0.53)
 9	CD-ROM access sampling (not implemented yet in 0.53)
 10	DOS spinner
 11	DOS process start/end and miscellaneous process activity sampling
 12	mouse movement/button sampling
 13	disk sampling (INT 13)
 14	keystroke timings
 15	reserved for hardware RNG