SERIOUS PROBLEM WITH THE 41CL ***SOLVED***

[Sylvain Cote]

Hello Yann,

The following procedure will downgrade your 41CL to the 2024-03-05 package.

• 41CL Calculator Manual, section "Plug into Port/Unplug from Port Functions" (p.24 to p29) describe how to map a ROM image with its page address
• 41CL Memory Reference allow you to map the IMDB ID to/from its Flash page address
  • 41CL Memory Reference for v3+ boards
  • 41CL Memory Reference for v2 and beta boards
    
• download the previous archive file: rom_files_240305.zip
• plug the serial port between the 41CL and your computer
• start the clupdate program with the previous archive file (rom_files_240305.zip)
• 41CL: configure without IMDB
  
  Code:
  

  MMUDIS
MMUCLR
"00A-RAM"   // YFNX address in Flash
PLUG1L
"062-RAM"   // YUPS address in Flash
PLUG1U
MMUEN
CAT 2       // ... "-YFNX 4C" ... "UPDAT 4D" ...
• 41CL: downgrade
  
  Code:
  

  CMOPEN
CPONLY
"*"
FLCHK?
FLUPD
CDBEXP      // update list should be empty
CMCLOSE
• 41CL: validation & cleanup
  
  Code:
  

  FDBVER?     // 03/05/2024
CDBDEL
MMUDIS
MMUCLR
• PLUG functions should now works with IMDB names
  

Sylvain

edit: typos