>>9878
What am I doing wrong here?

Normal byte order
>$ echo bd92 | xxd -p -r - | xxd -b -
>00000000: 10111101 10010010
>$ echo 40fa | xxd -p -r - | xxd -b -
>00000000: 01000000 11111010

Decode:
>mtime
> Bits 00-04: seconds divided by 2
10111 -> 23
> Bits 05-10: minute
101100 -> 44
> Bits 11-15: hour
10010 -> 18