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Trans lation Fo rmats ProM aster 25 00 User Manua l D-3 1 Hewlett-Packard 64000 Absolute Format , Code 89 Hewlett-Packard Absolute is a binary format with con trol and data-checking characters. S ee Figure D-16. Data fil…
Translation Formats
D-30 ProMaster 2500 User Manual
Problem:
Find the address for the first data byte for the following file.
:02 0000 02 1230 BA
:10 0045 00 55AA FF.....BC
Solution:
Step 1. Find the record address for the byte. The first data byte is 55.
Its record address is 0045 from above.
Step 2. Find the offset address. The offset address is 1230 from
above.
Step 3. Shift the offset address one place left, then add it to the
record address, like this:
1230
Offset address (upper 16 bits)
+ 0045
Record address (lower 16 bits)
12345
20-bit address
The address for the first data byte is 12345.
Note: Always specify the address offset when using this format, even when the
offset is zero.
During output translation, the firmware will force the record size to 16
(decimal) if the record size is specified greater than 16. There is no such
limitation for record sizes specified less than 16.
03-Start Record
This record type is not sent during output by Data I/O translator
firmware.
Translation Formats
ProMaster 2500 User Manual D-31
Hewlett-Packard 64000 Absolute Format, Code 89
Hewlett-Packard Absolute is a binary format with control and
data-checking characters. See Figure D-16.
Data files begin with a Start-of-file record, which includes the Data Bus
Width, Data Width Base, Transfer Address, and a checksum of the bytes
in the record.
Figure D-16
An Example of HP 64000 Absolute Format
End-of-File record consists only of a word count of 0.
Checksum
Data bytes
Address where following data byte is to be stored.
BYTE COUNT — number of 8-bit data bytes.
WORD COUNT — number of 16-bit words in record except checksum and itself.
CHECKSUM — modulo 256 sum of all bytes in the record except the first byte.
TRANSFER ADDRESS — for microprocessor program counter.
DATA WIDTH BASE — see text.
DATA BUS WIDTH — see text.
WORD COUNT — number of 16-bit words in the record; always 04 in
Start-of-File record.
Note:
START-OF-FILE
RECORD
ONE DATA
RECORD
END-OF-FILE
RECORD
0088-2
HIGH
ORDER
LOW
ORDER
Third Byte
MSB
LSB
Second Byte
32-bit address
is sent in this
manner, in 4
groups of 8-bit
bytes.
This format is binary. Therefore, no ASCII control characters
or carriage returns and line feeds are allowed.
Translation Formats
D-32 ProMaster 2500 User Manual
The Data Bus Width represents the width of the target system’s bus (in
bits). The Data Width Base represents the smallest addressable entity
used by the target microprocessor.
The Data Bus Width and Data Width Base are not used by the
programmer during download. During upload, the Data Bus Width will
be set to the current Data Word Width, and the Data Width Base will be
set to 8. The Transfer Address is not used by the programmer.
Data records follow the Start-of-file record. Each begins with 2 byte
counts: the first expresses the number of 16-bit bytes in the record, not
including the checksum and itself; the second expresses the number of
8-bit data bytes in the record. Next comes a 32-bit address, which
specifies the storage location of the following data byte. Data bytes
follow; after the last data byte is a checksum of every byte in the record
except the first byte, which is the word count.
The End-of-file record consists of a one byte word count, which is always
zero. Leader and trailer nulls, normally 50 each, are suppressed in this
translation format.