Legacy CIM test pattern:
------------------------

C = Checksum Byte
L = Length Byte (contains Length byte (byte 2) and rest of data but
it excludes the checksum byte)

1. Packet length inside Lookup Table

Address    Length    Pattern
--------------------------------------------
   0         1        0
   1         2        1 0
   2         3        2 0 1
   3         4        3 0 1 2
   4         5        4 0 1 2 3
   5         6        5 0 1 2 3 4

2. Packet length inside Lookup Table with Checksum

Address    Length    Pattern
--------------------------------------------
   0         1        0
   1         2        1 C
====================================
   2         3        2 0 C
   3         4        3 0 1 C
   4         5        4 0 1 2 C
   5         6        5 0 1 2 3 C

3. Packet length inside packet

Address    Length    Pattern
--------------------------------------------
   0         1        0
   1         2        1 L
====================================
   2         3        2 L 1
   3         4        3 L 1 2
   4         5        4 L 1 2 3
   5         6        5 L 1 2 3 4

4. Packet length inside packet with Checksum

Address    Length    Pattern
--------------------------------------------
   0         1        0
   1         2        1 L
   2         3        2 L C
====================================
   3         4        3 L 1 C
   4         5        4 L 1 2 C
   5         6        5 L 1 2 3 C
