HP Calculators Timeline » HP 49g+ » HP49G+ rom upgrade

Step-by-step to upgrading your HP49g+ rom.

Revised on August 2005.

If you are unsure of your ROM version on your calculator, use command VERSION (press twice ALPHA key, type VERSION and then press ENTER key) to find this out. The HP 49g+ will return two strings, with the first saying something like Version HP49-C Revision #1.22 (in the case your HP49g+ was set to Algebraic notation mode, you have to press down arrow key to see this information).

This procedure is potentially risky, you may put your calculator into a zombie state! If that happens, you should try the update using another computer.

  • Install connectivity and check that this is working - this is not a pre-requisite but it is a good way to ensure that your computer can communicate with your hp 49g+. (Note: As of this writing, the Connectivity version 2.2 Build 2348, has a bug (or by design), if you have a Zombie (partially dead) Calculator, you may not be able to re-update the ROM. The "ROM" option is not clickable.)
    • Start Connectivity Kit Software.
    • Check that the "Connect Using" field has the option "HPx9G+" - if you don’t see this, then it may an indication that your Calculator has not been connected properly to your PC. Or the USB drivers has not been properly install.
  • Perform a calculator self test:
    • Off the calculator and the hold + - key and then using a pin to push the reset slot (back).
      • You should see on the Calculator screen:
        [1. UPDATE CODE]
        [2. SELF TEST]
        [BOOT VERSION: 3.15.04]
        [SERIAL: CN########]
    • Press 2 to select the option.
    • The screen will display the ROM version - if it displays version 4.01 Build 0080, then you need not perform this upgrade.
    • You should take this opportunity to test your calculator by following the screen instructions.
    • Push the pin into the reset slot to terminate this mode.
  • Download software from HP website. or educalc.net local mirror below:
  • Connect the calculator to your computer.
  • Execute the software and following the instructions displayed on your computer.
    • If menu ROM has been grey out, change "Select Using" from Auto to "USB Calculator".
    • Select menu ROM and choose "Download Calculator ROM."
    • Browse and select the rom file - 49Gp_88.bin and click open.
    • This will display the following instructional box.
      hp49 conn kit dialog
  • On the calculator side:
    • Off the calculator and the hold + - key and then using a pin to push the reset slot (back).
    • Press 1 to select "Update Code".
    • Press 1 to select "USB"
    • The screen will display "BEGIN UPDATE" and it will show the progress till the entire sequence has completed.
  • Click OK button on the computer to start the transfer.
    running
    If the transfer don’t run, try removing the USB cable from the Calculator and reinsert it back again.
  • A download dialog box should appear monitoring the download process. This should take around 1 minute.
  • On the Calculator, you should progressively see:
    [ERASE FINISHED.]
    [UPDATE FINISH.]
    [WAIT REST] ** Warning: do not power off calculator until you see this message!
  • When the download is finish (the calculator displays: "Update Finish, waiting for reset"), press the reset button, your calculator has been upgraded.
  • If your HP49g+ can power up, chances is that the update was successful.

Verify the update:

  • Perform a calculator self test:
  • Off the calculator and the hold + - key and then using a pin to push the reset slot (back).
    • You should see on the Calculator screen:
      [1. UPDATE CODE]
      [2. SELF TEST]
      [BOOT VERSION: 3.15.04]
      [SERIAL: CN########]
  • Press 2 to select the option.
  • The screen will display the version 4.01

Updated On: 13.09.15

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