• Date : September 2021
• From : Swiss Micros (direct)
• Price : £95
• Serial : 21350
• New Battery
  • July 27^th 2022
  • July 26^th 2024

cp210x_universal_windows_driver.zip

voyage_firmware_tool.zip

• From HP Forum https://www.hpmuseum.org/forum/thread-20046.html

The firmware behaves mostly like a normal HP15C with a few differences:

1. Long press GTO in program mode to access go to label feature (single press in run mode)
2. Long press GSB in program mode to access go to line feature (single press in run mode)
3. Press I in normal mode to create/destroy a complex number
4. Press (i) in normal mode to calculate the complex conjugate
5. FIX/SCI/ENG don't round numbers unless gRND is pressed. Section 5 (page 59) of the manual suggests that the precision set with SCI sets how the number is rounded during operation
6. ENGnn sets the number of significant digits, UNLIKE the original HP15C in which ENGn sets the significant digits to n+1
7. To run a program other than A-E the user can press f LBL, which is different than on the original HP15C where to run a label you used GSB
8. Long press STO to dump program memory to serial. Long press RCL to put the calculator in listen mode, where numbers received on the serial interface are written to program memory. The speed of the serial port is 57600 baud.
9. In program mode, f CLEAR PREFIX places the runTime opCode in the program. runTime write to X the program execution time once it's executed.
10. Indirect addressing the labels A to E is done with I = 100 to 104.
11. There are 10 user flags, from 0 to 9.
12. f → R and g → P apply only on complex numbers.
13. It’s possible to delete a single program with f CLEAR PRGM followed by a label
14. f and a long press on CLEAR PRGM deletes the entire program memory
15. f USER and g MEM are not implemented and don't do anything at the moment.
16. When running a program step by step, a long press on SST doesn’t execute the current step.

• Serial Port dump info : https://www.hpmuseum.org/forum/thread-20046-post-194697.html#pid194697
• Serial Port settings
  • Rate : 57600
  • Data : 8 bit
  • Stop : 1 bit
  • Parity : None
  • Flow Control : None
• To extract a dump from calculator press and hold STO
  • the non-zero digits can be copy/pasted into a text file for storage
• To upload a previously saved dump
  • copy it to clipboard and then
  • press and hold RCL until the terminal shows Paste PrgMemory:
  • in Putty ShiftInsert to paste clipboard text into terminal

sudo lpc21isp <firmware_file> <serial_port> 115200 12000

• Firmware : https://technical.swissmicros.com/voyager/firmware/
• Documentation : User Manual
• Product Page : DM15L

• See DM15L Progs