Specifications For Texas Instruments Sdsmac Data Files - Data I/O 298 Manual

I
INPUT
START-OF-FILE RECORD
I
M
T'9 Ch""'""·
Always
fo41owod
by
a fi< hoad"'
I
x
I v
I I ~
I
x
y
y
File Header.
XXXX =hexadecimal byte count of 16-bit data bytes in the record.
Y
YYYYYYYY =name of file. May be any ASCII character in
y
y
y
y
y
9
A
hexadecimal notation.
Optional Tag Character. Always followed by a load address. Tag
characters 9 and B may come in any order.
A Load Address: 4-character hexadecimal address of first data byte in
A the record.
A
B Tag Character. A "B" must precede every 4 data characters.
H
H
H
H
~
I
B
I
H
H
H
H
HH = 2-character hexadecimal data byte.
7 or 8
Tag Character. Must be followed by a 4-character checksum field. If
8, programmer will ignore the checksum.
c
c
c
c
Hexadecimal Checksum. Two's complement of the sum of the 8-bit
ASCII values of the characters in the record from the first tag
character through the checksum tag (7 or 8).
F
Tag Character. Denotes end of the data record. All characters
following F before line feed and carriage return will be ignored.
~
OUTPUT
NOTES
1)Number of bytes per record is variable.
2)Each line ends with nonprinting line feed, carriage return and nulls.
Start-of-File
/Record
0XXXXYYYYYYYY9AAAABHHHHBHHHH ... 7CCCCF
BHHHHBHHHHBHHHHBHHHHBHHHH .... 7CCCCF
BHHHHBHHHHBHHHHBHHHHBHHHH .... 7CCCCF
BHHHHBHHHHB~HHBHHHHBHHHH
.... 7CCCCF
/
' ' End-of-Hie
R~
2 He• Charnote" • 1 byte
Data
Records
DATA RECORD
R
I
A
I
B
H
H
H
H
B
H
H
H
H
~~
B
H
H
H
H
7
or 8
c
UJ
Fl
Optional Tag Character. Always followed by a load address. Tag
characters 9 and B may come in any order.
AAAA = Load address: 4-character hexadecimal address of first
data byte in the record.
Tag Character. A "B" must precede every 16-bit data byte.
HH = 2-character hexadecimal data byte.
Tag Character. Must be followed by a 4-character checksum field.
If 8. checksum will be ignored by programmer.
Checksum in hexadecimal notation. Two's complement of the sum of
the 8-uit ASCii vaiues of the characters iii the record from the first
tag character through the checksum tag (7 or 8).
Tag charncter. Denotes end of data record. All characters following F
before line feed and carriage return will be ignored.
END-OF-FILE RECORD
End-of-file character
LEGEND
0,7,8,9,B,F =Tag Characters
AAAA = Address Field
XXXX = Byte Count
YYYYYYYY
=
File Name
HH =Two Hexadecimal Digits (Q-9, A-Fl
CCCC = Checksum
Figure A-19. Specifications for Texas Instruments SDSMAC Data Files
A-19
10-990-0013