Intel HEX File Format: Record Type 03 -  Start Address Record
:04 0000 03 xxxx xxxx xx
 |   |   |  |    |    | _ checksum field
 |   |   |  |    |_ Offset of start address
 |   |   |  |_Code segment of start address
 |   |   |   
 |   |   |_Record type(always 3)
 |   |_Address field (not used, always 0)
 |_Record length(always 4)