Examples
In the examples below, S indicates the starting client sequence number.

Host                                    Client
======================================================================
[Initialization, S = 0x55AA]
[Host: version 1, 2048-byte packets. Client: version 2, 1024-byte packets.]
[Resulting values to use: version = 1, max packet size = 1024]
ID   Flag SeqH SeqL Data                ID   Flag SeqH SeqL Data
----------------------------------------------------------------------
0x01 0x00 0x00 0x00
                                        0x01 0x00 0x00 0x00 0x55 0xAA
0x02 0x00 0x55 0xAA 0x00 0x01 0x08 0x00
                                        0x02 0x00 0x55 0xAA 0x00 0x02 0x04 0x00

----------------------------------------------------------------------
[fastboot "getvar" commands, S = 0x0001]
ID    Flags SeqH  SeqL  Data            ID    Flags SeqH  SeqL  Data
----------------------------------------------------------------------
0x03  0x00  0x00  0x01  getvar:version
                                        0x03  0x00  0x00  0x01
0x03  0x00  0x00  0x02
                                        0x03  0x00  0x00  0x02  OKAY0.4
0x03  0x00  0x00  0x03  getvar:none
                                        0x03  0x00  0x00  0x03
0x03  0x00  0x00  0x04
                                        0x03  0x00  0x00  0x04  FAILUnknown var

----------------------------------------------------------------------
[fastboot "INFO" responses, S = 0x0000]
ID    Flags SeqH  SeqL  Data            ID    Flags SeqH  SeqL  Data
----------------------------------------------------------------------
0x03  0x00  0x00  0x00  <command>
                                        0x03  0x00  0x00  0x00
0x03  0x00  0x00  0x01
                                        0x03  0x00  0x00  0x01  INFOWait1
0x03  0x00  0x00  0x02
                                        0x03  0x00  0x00  0x02  INFOWait2
0x03  0x00  0x00  0x03
                                        0x03  0x00  0x00  0x03  OKAY

----------------------------------------------------------------------
[Chunking 2100 bytes of data, max packet size = 1024, S = 0xFFFF]
ID   Flag SeqH SeqL Data                ID   Flag SeqH SeqL Data
----------------------------------------------------------------------
0x03 0x00 0xFF 0xFF download:0000834
                                        0x03 0x00 0xFF 0xFF
0x03 0x00 0x00 0x00
                                        0x03 0x00 0x00 0x00 DATA0000834
0x03 0x01 0x00 0x01 <1020 bytes>
                                        0x03 0x00 0x00 0x01
0x03 0x01 0x00 0x02 <1020 bytes>
                                        0x03 0x00 0x00 0x02
0x03 0x00 0x00 0x03 <60 bytes>
                                        0x03 0x00 0x00 0x03
0x03 0x00 0x00 0x04
                                        0x03 0x00 0x00 0x04 OKAY

----------------------------------------------------------------------
[Unknown ID error, S = 0x0000]
ID    Flags SeqH  SeqL  Data            ID    Flags SeqH  SeqL  Data
----------------------------------------------------------------------
0x10  0x00  0x00  0x00
                                        0x00  0x00  0x00  0x00  <error message>

----------------------------------------------------------------------
[Host packet loss and retransmission, S = 0x0000]
ID    Flags SeqH  SeqL  Data            ID    Flags SeqH  SeqL  Data
----------------------------------------------------------------------
0x03  0x00  0x00  0x00  getvar:version [lost]
0x03  0x00  0x00  0x00  getvar:version [lost]
0x03  0x00  0x00  0x00  getvar:version
                                        0x03  0x00  0x00  0x00
0x03  0x00  0x00  0x01
                                        0x03  0x00  0x00  0x01  OKAY0.4

----------------------------------------------------------------------
[Client packet loss and retransmission, S = 0x0000]
ID    Flags SeqH  SeqL  Data            ID    Flags SeqH  SeqL  Data
----------------------------------------------------------------------
0x03  0x00  0x00  0x00  getvar:version
                                        0x03  0x00  0x00  0x00 [lost]
0x03  0x00  0x00  0x00  getvar:version
                                        0x03  0x00  0x00  0x00 [lost]
0x03  0x00  0x00  0x00  getvar:version
                                        0x03  0x00  0x00  0x00
0x03  0x00  0x00  0x01
                                        0x03  0x00  0x00  0x01  OKAY0.4

----------------------------------------------------------------------
[Host packet delayed, S = 0x0000]
ID    Flags SeqH  SeqL  Data            ID    Flags SeqH  SeqL  Data
----------------------------------------------------------------------
0x03  0x00  0x00  0x00  getvar:version [delayed]
0x03  0x00  0x00  0x00  getvar:version
                                        0x03  0x00  0x00  0x00
0x03  0x00  0x00  0x01
                                        0x03  0x00  0x00  0x01  OKAY0.4
0x03  0x00  0x00  0x00  getvar:version [arrives late with old seq#, is ignored]
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