Data I/O UniSite-xpi, User Manual

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6. Translation Formats
6-28 UniSite-xpi User Manual
Motorola EXORmacs Format, Code 87
Motorola data files may begin with an optional sign-on record, initiated
by the start characters S0. Data records start with an 8- or 10-character
prefix and end with a 2-character suffix. Figure 6-14 shows a series of
Motorola EXORmacs data records.
Each data record begins with the start characters S1 or S2: S1 if the
following address field has 4 characters, S2 if it has 6 characters. The third
and fourth characters represent the byte count, which expresses the
number of data, address, and checksum bytes in the record. The address
of the first data byte in the record is expressed by the last 4 characters of
the prefix (6 characters for addresses above hexadecimal FFFF). Data
bytes follow, each represented by 2 hexadecimal characters. The number
of data bytes occurring must be 3 or 4 less than the byte count. The suffix
is a 2-character checksum, the one’s complement (in binary) of the
preceding bytes in the record, including the byte count, address, and data
bytes.
The end-of-file record begins with an S9 start character. Following the
start characters are the byte count, the address, and a checksum. The
maximum record length is 250 data bytes.
Figure 6-14
An Example of Motorola EXORmacs Format
S214FF0000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC
S00B00004441544120492F4FF3
S1130010FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEC
S1130020FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDC
S1130030FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFCC
S1130040FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBC
S9030000FC
Start
Character
Byte Count
Checksum
Address
End-of-File Record
Optional Sign-On Record
Data
Records
LEGEND
Nonprinting Carriage Return, line feed, and nulls determined by null count
0086-3
Checksum
Checksum