The memory format of the new DN9848 Host Code (V4.xx. is the same as the previous version (V3.xx. –
but there have been some changes to the organization of the number and type pf memories.

In previous versions, the memories consisted of 5 User, 32 System and up to 96 Preset memories. The
Preset memories were underused, so from version 4 onwards they have been re-purposed as backup
memories. The 32 Backup memories are stored in non-volatile memory, which retains its data even if the
internal battery fails, whereas the System memories are stored in battery-backed memory. It is now
possible to backup the 32 system memories to ensure that they cannot be lost. The user memories are not
backed up.

This means that several steps must be carried out to save the original Preset memory data to file before
loading the new Host Code. This is particularly important if you have modified the Preset memories (using
the Klark Teknik Preset Editor application., and stored them into locations above Preset Memory 32. Note
that the Klark Teknik Preset Editor application has no purpose after the units have been upgraded to V4.xx.

A. If you have not edited any Preset Memories:
You may upgrade your unit to version 4.xx immediately. Load the Preset Memories from the RCS install
directory and load them to a User or System location of your choice in the DN9848 / Helix DN9848E unit
using the DN9848RCS Elgar AddIn.

B. If you do not have any Preset Memories above location 32:
You should load the new Host Code immediately then follow the steps below:
1. Use the DN9848RCS Elgar AddIn to save your User and System memories to a file.
2. Take the DN9848 unit out of remote control mode
3. Perform a Restore operation. This copies your Preset memories into the User and System memory
area.
4. Put the unit back into remote control mode.
5. Use the DN9848RCS Elgar AddIn to save your User and System memories, which now contain
your old Preset data, to a file. Save this file with a suitable name to remind you it is your old Preset
Data.
You can now load whichever set of data you want into your unit.

C. If you have edited your Preset Memories to have Presets stored above location 32:
You MUST use the Preset Editor to move your Presets to a location prior to location 32 BEFORE you will
be able to use them in the new Host Code. Failure to do this will result in the Preset Memories stored above
location 32 becoming inaccessible, though they will not be lost. To move these Presets, follow the steps
below:
1. Ensure you have a copy of the Preset Editor application, a copy of V3.xx Host Code, and V4.xx
Host Code.
2. With V3.xx Host Code Software loaded into the DN9848 / Helix DN9848E, connect a PC and start
the Klark Teknik Preset Editor application.
3. Save the first 32 Preset Memories to a suitably named file. Exit the application.
4. Upgrade the unit to V4.xx
5. Follow the steps in section B above.
6. Downgrade the unit to V3.xx Host Code.
7. Start the Klark Teknik Preset Editor application.
8. Move the Preset Memories in locations 33 to 64 into locations 1 to 32, and save these to a suitable
file.
9. Upgrade the unit to V4.xx.
10. Repeat the steps in section B above.
11. Repeat steps 7 to 10 for Preset Memories 65 to 96.

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