Symbol PDT 1100 Manual page 17

Each record in a function file is fixed to 130 bytes in length (except the last record) and
suffixed by a set of CR-LF codes, as follows.
Record
When downloading a function file, if the length of the last record is less than 130 bytes, the
blank bytes (130 bytes minus last record length) are zero-filled, so that every record is 130
bytes long.
Record length (130 bytes)
When downloading:
Record length (130 bytes)
Record length (130 bytes)
CR
CR
CR
CR
Zero Codes
CR LF
CR LF
CR LF
CR LF
CR LF
LF
LF
LF
LF
DLL File Formats
2-3