More options: (read/write DCO4, read DCS4)
0004 enable interrupt 8 hook
0008 enable interrupt 2Dh hook
0010 enable 86 Mode fault interrupt hooks
0001_0000 force serial interrupt unhooking
0004_0000 force interrupt 8 unhooking
0008_0000 force interrupt 2Dh unhooking
0010_0000 force interrupt 0Dh unhooking
0020_0000 force interrupt 0Ch unhooking
0100_0000 force interrupt 0 unhooking
0200_0000 force interrupt 1 unhooking
0400_0000 force interrupt 3 unhooking
0800_0000 force interrupt 6 unhooking
1000_0000 force interrupt 18h unhooking
2000_0000 force interrupt 19h unhooking
