Specifications For Signetics Absolute Object Data Files - Data I/O 298 Manual

• SIGNETICS ABSOLUTE OBJECT FORMAT, CODE 85
Figure A-13 shows the specifications of Signetics format
files. The data in each record is sandwiched between a
9-character prefix and a 2-character suffix.
The start character is a colon. This is followed by the
address of the first data byte, the byte count, and a 2-digit
INPUT
A
A
A
A
B
c
A
c
H
H
D
c
START CHARACTER
AAAA =Address of the first data byte in record. AAAA in
hexadecimal notation only
BC= The hexadecimal number of data bytes in the record
AC= Address Check. Every byte is exclusive ORed with
the previous byte, then rotated left one bit.
HH =One data byte in hexadecimal notation.
DC= Data Check. Every byte is exclusive ORed with the
previous byte, then rotated left one bit.
This space can be used for line feed, carriage return or
comments.
(Beginning of next record)
LEGEND
AAAA
BC
= Start Character
=Address Field
=
Byte Count (Data Bytes/Record)
AC = Address Check. Checksum of address and byte count
HH = Two Hexadecimal Digits (0·9, A-F)
DC
=
Data Check. Checksum of data in record
address check. Data is represented by pairs of hexadecimal
characters. The byte count must equal the number of data
bytes in the record. The suffix is a 2-character data check,
calculated using the same operations described in figure
A-13 for the address check.
END-OF-FILE RECORD
A
A
A
A
B
c
q
OUTPUT
START CHARACTER
Address
Byte Count. BC= 00 in End-of-File Record
NOTES
1) Number of bytes per record is variable. See Table 3·1.
2)
Each line ends with nonprinting line feed. carriage return
and nulls
2
HEX characters -
1
byte Data Records
AAAABCACHHHHHHHH~HHHHHHHHHHHHHHHHHHHHH~~
AAAABCACHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH~~(/
AAAABCACHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHDC
·AAAABCACHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHDC
AAAABCAC
Figure A-13. Specifications for Signetics Absolute Object Data Files
A-12
10-990-0013