Elektronika MK-52: The MK-61 big brother?

[jebem]

Final test: Check the EEPROM constant memory

What the heck, I had just time enough to do this verification test before preparing myself to travel.

I have to thank again to Sergei Frolov for publishing so much details on these Russian calculators.

The next procedure was prepared by Sergei.
I followed it by the letter, and my calculator works nicely, saving the program area contents to EEPROM!!!

To ensure that your MK-52 has workable EEPROM, you may proceed
following test:

Erasing EEPROM:
1. Place 'C 3 CЧ' switcher -> 'C' position (clear EEPROM)
2. Place 'Д П' (D P) switcher -> 'П' (P) position (mean "Program
area")
3. Turn on calculator or press [Cx] key.
4. Enter 1000024 (first 24 cells to erase)
5. Press [A^] (A up arrow)
6. Press [^v] (up/down arrows) (clear EEPROM)

Filling EEPROM
7. Press [B/0] (program counter = 00)
8. [F] [ПРГ] (PRG) (enter program mode)
9. Press [1][2][3][4][5][6] (or something similar keys)
10. [F] [ABT] (return to manual calculations).
11. Place 'C 3 CЧ' switcher -> '3' position (write to EEPROM)
12. Press [^v] (up/down arrows) (store program to EEPROM)
13. Place 'C 3 CЧ' switcher -> 'CЧ' position (read from EEPROM)
14. Turn OFF calculator, wait for 30 secs.

Checking EEPROM
15. Turn ON calculator
16. Enter 1000024 (first 24 cells to reading)
17. Press [A^] (A up arrow) (store command)
18. Press [^v] (up/down arrow) (read EEPROM)
19. [F] [ПРГ] (PRG) (enter the program mode)
20. Press [ШГ->] (step forward) six times and check for codes [01]
[02] ... [06], which was entered in step 9.