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INTEL HEX FILE FORMAT
8051–compatible assemblers produce an absolute out-
put file in Intel Hex format. These files are composed of a
series of records. Records in an Intel Hex file have the
following format:
<Header><Hex Information><Record Terminator>
The specific record elements are detailed as follows:
: II aaaa tt dddddd ... dd xx
Where:
: Indicates a record beginning
II Indicates the record length
aaaa Indicates the 16 bit load address
tt Indicates the record type
dd Indicates hex data
xx Indicates the checksum = (2’s complement
(II+aa+a+tt+dd+dd+...dd)
Record type 00 indicates a data record and type 01 indi-
cates an end record. An end record will appear as :00
00000 01 FF. These are the only valid record types for a
NIL hex file. Spaces are provided for clarity.
The following is a short Intel hex file. The data bytes be-
gin at 01 and count up to 2F. Notice the records length,
beginning address, and record type at the start of each
line and the checksum at the end.
:200000000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F20D0
:0F0020002122232425262728292A2B2C2D2E2F79
:00000001FF