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public:calculator:info:lf15c [31/01/26 09:23 GMT] – [Files] johnpublic:calculator:info:lf15c [03/02/26 13:34 GMT] (current) – [DM15L running V33 or later (Linux)] john
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 ==== DM15L running V32 or earlier (Linux) ==== ==== DM15L running V32 or earlier (Linux) ====
  
-  * ''sudo lpc21isp <FIRMWARE FILE NAME> /dev/ttyUSB0 115200 1200''+  * ''sudo lpc21isp LF15C_250408.hex /dev/ttyUSB0 115200 1200''
   * Press hidden ''reset'' button   * Press hidden ''reset'' button
     * firmware is flashed     * firmware is flashed
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 ==== DM15L running V33 or later (Linux) ==== ==== DM15L running V33 or later (Linux) ====
 +
 +<note>
 +This behaviour isn't consistent!
 +
 +I've seen it be possible to flash and run LF15C directly after DM15 V34 with no problems.
 +
 +I've also seen the problems described below, requiring downgrade to V32.
 +
 +Just bear it in mind if you have problems starting LF15C after flashing it on top of V33-onwards
 +</note>
  
 The new Swiss Micros firmware V33 changes the behaviour of the bootloader, and it appears to be impossible to flash 3rd party firmware when the calculator is running V33 or later.  The new Swiss Micros firmware V33 changes the behaviour of the bootloader, and it appears to be impossible to flash 3rd party firmware when the calculator is running V33 or later. 
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     * firmware is flashed     * firmware is flashed
   * press hidden ''reset'' button to start V32 firmware   * press hidden ''reset'' button to start V32 firmware
-  * ''sudo lpc21isp <LF15C FIRMWARE> /dev/ttyUSB0 115200 1200''+  * ''sudo lpc21isp LF15C_250408.hex /dev/ttyUSB0 115200 1200''
   * press hidden ''reset'' button   * press hidden ''reset'' button
     * firmware is flashed     * firmware is flashed
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 ==== For installation using Windows ==== ==== For installation using Windows ====
  
-  * The Swiss Micros **Voyager Update Tool** will work to install LF15C +  * The Swiss Micros **Voyager Update Tool** will work to install LF15C 
 +    * Do not use the new Web Update tool
   * The same caveats regarding installation after using the Swiss Micros V33 apply   * The same caveats regarding installation after using the Swiss Micros V33 apply
     * **First downgrade to V32**     * **First downgrade to V32**
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     * the version attached to Post #1 is always the latest available.      * the version attached to Post #1 is always the latest available. 
   * At present (Jan '26) there is also a beta version which is being used to test various compiler optimizations, and is buggy and best avoided.   * At present (Jan '26) there is also a beta version which is being used to test various compiler optimizations, and is buggy and best avoided.
-  + 
   * Swiss Micros    * Swiss Micros 
-    * Firmware [[https://technical.swissmicros.com/voyager/firmware/old/DM15_M1B_32.hex]] +    * V32 Firmware [[https://technical.swissmicros.com/voyager/firmware/old/DM15_M1B_32.hex | DM15_M1B_32.hex]] 
-    * and Voyager Update Tool [[https://technical.swissmicros.com/voyager/firmware/Voyage_Firmware_Tool.zip]]+    * Voyager Update Tool [[https://technical.swissmicros.com/voyager/firmware/Voyage_Firmware_Tool.zip | Voyager Firmware Update Tool]]
  
 ===== LF15C General Info ===== ===== LF15C General Info =====
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   * User Mode   * User Mode
   * Memory management   * Memory management
-    * partitioning between Storage Registers and Program Space is not supported and is meaningless+    * partitioning between Storage Registers and Program Space is not required or supported
  
  
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 ++++ ++++
  
 +Make a pure imaginary number by using <key>'f'</key><key>Re<>Im</key>
 +
 +++++ Example (Click to view) |
 +
 +
 +<key>3</key>
 +
 +''X: 3_''
 +
 +<key>'f'</key><key>Re<>Im</key>
 +
 +''X: 0.0000 + 3.0000 i ''
 +
 +++++
  
  
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 ==== Indirect addressing ====  ==== Indirect addressing ==== 
 +
 +Similar features to the standard HP15C, with differences due to increased Program Label numbers
 +
  
 === Indirect Register pair I & (i) === === Indirect Register pair I & (i) ===
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 ==== And the rest ==== ==== And the rest ====
 +
  
   * 100 Storage Registers ''00 - 99'' are capable of storing Complex Numbers   * 100 Storage Registers ''00 - 99'' are capable of storing Complex Numbers
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   *  In program mode, <key>'f'</key> <key>CLEAR PREFIX</key> places the ''runTime'' opCode in the program. ''runTime'' writes to ''x'' the program execution time once it's executed.   *  In program mode, <key>'f'</key> <key>CLEAR PREFIX</key> places the ''runTime'' opCode in the program. ''runTime'' writes to ''x'' the program execution time once it's executed.
  
-  *  It’s possible to delete a single program with <key>'f'</key> <key>CLEAR PRGM</key> followed by a label +  *  Deleting User Programs 
-  *  <key>'f'</key> and a long press on <key>CLEAR PRGM</key> clears the entire program memory+    * Delete a //**single program**// : <key>'f'</key> <key>CLEAR PRGM</key> followed by a label 
 +    * Delete //**ALL programs**// :  <key>'f'</key> and __long press__ <key>CLEAR PRGM</key>
  
  
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   *  There are 10 user flags, from 0 to 9.    *  There are 10 user flags, from 0 to 9. 
-    * There are no LCD annunciators to show state, but can be set, cleared and tested for decision making in program branching+    * There are no LCD annunciators to show state, but flags can be set, cleared and tested for decision making in program branching
  
   *  Long press <key>GTO</key> in program mode to access ''go to label'' feature (single press in run mode)   *  Long press <key>GTO</key> in program mode to access ''go to label'' feature (single press in run mode)
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   *  When running a program step by step, a long press on <key>SST</key> doesn’t execute the current step.   *  When running a program step by step, a long press on <key>SST</key> doesn’t execute the current step.
  
-  * <key>'f'</key> <key>USER</key> and <key>'g'</key><key> MEM</key> are not implemented and don't do anything at the moment.+  * Unused Keys 
 +    * <key>'f'</key> <key>USER</key>, <key>'g'</key><key> MEM</key>, <key>'f'</key><key>DIM</key>, <key>'f'</key><key>MATRIX</key> and <key>'f'</key><key>RESULT</key> are not implemented and don't do anything at the moment.
  
 ===== LF15C Serial Port Info ===== ===== LF15C Serial Port Info =====

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