Union Products Communication display Unit 6696 ユーザーズマニュアル

SM 7063  07/97                                                                                                                            A-1

The CDU uses a FLASH type programmable non-volatile memory chip to store its application software
as opposed to a standard EPROM.  This eliminates the need to disassemble the unit and physically
replace the EPROM in the event that software upgrades are issued.

Software upgrades are supplied by US&S on a CDU Executable Software Disk containing two files;
(1) the latest upgrade version of the CDU executable software named “cdu.hex”, and (2) the Cab Unit
Flash Loader program named “load.exe”.  This is a 3.5” disk and is available under US&S part
number N451232-1633.

Software upgrades are downloaded into the CDU’s Flash memory from a PC connected to the CDU’s
rear mounted DIAG connector via the same 9-pin “D” type serial cable used for performing diagnostics.
The download function is performed by running the Cab Unit Flash Loader Software as detailed in the
following sections.

The Cab Unit Flash Loader program is named “load.exe” and runs on a DOS compatible PC.

Although this program may be run from the floppy disk drive, it is preferable to copy it to a directory on
the PC’s hard drive.  The new Upgrade Version of “cdu.hex” must reside on same the floppy disk or
hard drive directory containing “load.exe”.

At the PC DOS prompt, the command syntax for “load.exe” can be viewed by typing in load followed by
<Enter>.  The PC will display the command structure as follows:

Therefore, the typical command line, depending on the PC serial port being used, will be:

load -COM1 cdu.hex -r  <Enter>    if PC serial port 1 is being used;

or

load -COM2 cdu.hex -r  <Enter>    if PC serial port 2 is being used.