Every 1.0s: sudo ./ioport | hexdump -C -v ; cat /proc/acpi/thermal_zone/THR{1,2}/temperature 
00000000  0a a0 01 00 00 00 00 00  00 00 50 0f 0f 0f 0e 0e  |. ........P.....|
                                         ^^^^^^^^^^^^^^^^^
                                         Event Ring buffer
00000010  0e 0e 00 00 00 00 00 4c  00 80 16 3f 0f 2d 00 00  |.......L...?.-..|
          ^^^^^ ^^----^^      ^^^^
                Head/Tail     also 0x18

00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  00 00 00 30 00 00 00 00  88 80 00 00 80 80 00 00  |...0............|
                  ^^^^            ^^^^
                  0x20            0x80  on screen off

00000050  00 90 90 00 00 00 00 00  00 80 80 00 00 00 00 00  |................|
               ^^^^
               =0x80 battery removed
            ^^^^
            =0x80 on battery/battery discharging?
00000060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000070  00 00 00 00 00 00 00 00  50 00 00 00 00 00 00 00  |........P.......|
                                  ^^^^
                          Changes with Battery removed  0x52 whilst on battery
00000080  03 7a 00 2b 00 00 9f 00  03 7a 01 30 00 00 9f 00  |.z.+.....z.0....|
                   ^^                       ^^
          Temperature A (M/B)      Temperature B (CPU)
00000090  03 7a 11 ff 00 00 9f 00  03 7a 10 ff 00 00 9f 00  |.z.ÿ.....z.ÿ....|
                   ^^                       ^^
                  Fan speed          Requested fan speed
000000a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000b0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000000d0  28 2c 37 3c 47 4a 7f 5e  5f 67 7f 7b 5d 55 04 80  |(,7<GJ.^_g.{]U..|
000000e0  80 3f 01 02 04 00 01 05  00 00 00 00 00 00 00 00  |.?..............|
                ^^
           Toggles every second
000000f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000100
temperature:             48 C
temperature:             43 C

Events:  0x50 = ThinkPad, 0x51 == VolUp, 0x52 == VolDown, 0x53 == mute, 
         0x0c = F3, 0x0d = F4, 0x10 = F7, 0x11 = F8, 0x15 = F12
         0x14 = ThinkLight, 
         0x20 = ?? (slbtn?), 0x31 AC Changed, 0x32 Battery changed, 0x2e LID, 
         0x0f = BrightnessUp,  0x0e = BrightnessDown
Fan:  0x7b == normal, 0xff == off, 0x5d == fast

Fan, seen 0xdb 0xbb 0x6b 0x7b 0


0x9d 0x7b

1001 1101
0111 1011



SMI commands:

  0x82 Toggle Speedstep, found:
    0xe980/int 0x15
    zero-page in kernel on boot
    Passing 'Copyright (C) ...' header