LD 143 is the load and the command is UPGRADE.
I don't have the complete procedure in front of me now, but I will try to get you in the right direction. Also not all PC CompactFlash Cards are compatible. You also must use card 0 port 0 for the UPGRADE command. Ld 43 BKO command is for TAPE drive units.
USE LD 143
TYPE
.upgrade
SOFTWARE INSTALLATION PROGRAM
************************************
Verify Security ID: 10040578
************************************
Software Installation Main Menu :
1. New Install or Option 11/11E Upgrade - From Software DaughterBoard
2. System Upgrade
3. Utilities
4. New System Installation - From Software Delivery Card
[q]uit, [h]elp or [?], <cr> - redisplay
TYPE 3 for utilities
Enter Selection : 3
Utilities Menu :
1. Restore backed Up Database
2. Archive Database Utilities
3. Install Archived Database
4. Review Upgrade Information
5. Clear Upgrade Information
6. Undo Installation
7. Flash Boot ROM Utilities
8. Current Installation Summary
[q]uit, [p]revious, [m]ain menu, [h]elp or [?], <cr> - redisplay
TYPE 2 for Archive Utilities
Enter Selection :2
Customer Database Archives:
1. List customer databases.
2. Remove customer database.
3. Archive a customer database.
[q]uit, [p]revious, [m]ain menu, [h]elp or [?], <cr> - redisplay
TYPE 1 to list current backup's if you want to.
Enter Selection : 1
Customer Database Archives:
1. List customer databases.
2. Remove customer database.
3. Archive a customer database.
[q]uit, [p]revious, [m]ain menu, [h]elp or [?], <cr> - redisplay
TYPE 3 to Archive a database:
Enter Selection : 3
Customer Database Archives:
1. List customer databases.
2. Remove customer database.
3. Archive a customer database.
[q]uit, [p]revious, [m]ain menu, [h]elp or [?], <cr> - redisplay
I have used this many times and have also restored using the same procedure.
Good luck.