Texas Instruments TMS320C54x, User Manual

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Description of the Object Formats
10-42
10.11.4 Texas Instruments SDSMAC Object Format (–t Option)
The TI-Tagged object format supports 16-bit addresses. It consists of a start-
of-file record, data records, and end-of-file record. Each of the data records is
made up of a series of small fields and is signified by a tag character. The sig-
nificant tag characters are:
Tag Character Description
K followed by the program identifier
7 followed by a checksum
8 followed by a dummy checksum (ignored)
9 followed by a 16-bit load address
B followed by a data word (four characters)
F identifies the end of a data record
* followed by a data byte (two characters)
Figure 10–13 illustrates the tag characters and fields in TI-Tagged object
format.
Figure 10–13. TI-Tagged Object Format
K000COFFTOTI90000BFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFF7EF3DF
BFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFF7EE37F
BFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFF7F245F
:
Tag characters
Program
identifier
Load
address
Data
words
Checksum
Data
records
End-of-file
record
Start-of-file
record
If any data fields appear before the first address, the first field is assigned
address 0000h. Address fields may be expressed for any data byte, but none
is required. The checksum field, which is preceded by the tag character 7, is
a 2s complement of the sum of the 8-bit ASCII values of characters, beginning
with the first tag character and ending with the checksum tag character (7 or
8). The end-of-file record is a colon ( : ).