newRPL - build 1255 released! [updated to 1299]

[Nigel (UK)]

(06-19-2019 10:44 PM)JoJo1973 Wrote:  

(06-06-2019 02:51 PM)Nigel (UK) Wrote:  Note that (much earlier in the newRPL development process) I found that the 49g+ drew a large current (several tens of mA) even when the calculator was turned off. I haven't checked this recently so I'm not sure if the problem was ever solved but it is something to bear in mind.

Is anyone currently using a 49g+ flashed with newRPL without the battery drain problem?

Nigel (UK)

Here I am: I own an old HP49G+, broken hinges and all (S/N: CN33900342 on the backplate, S/N CN33928709 on the bootloader screen FWIW, which is version 3.15.04) and a newer HP50G (S/N: CNA6080048, bootloader v4.01.03.03)

I can confirm that the battery drain problem is still present with latest build: I bought fresh batteries and flashed build 1255. In a few seconds after startup the battery indicator lit up and the batteries were drained in a couple of days, even if the calc was switched off.

After having replaced the batteries I reflashed original ROM 2.15 and the new ones have lasted since. HP50G experiences none of these problems.

If there's something I can test on the hardware let me know but keep in mind I can barely use a multimeter so give me very detailed instructions!

So far as I know it is a software problem - there was one early version of the HP49g+ firmware which had a similar battery drain problem (ROM version 1.21, I believe), and this was quickly withdrawn and replaced with a version that did not (ROM version 1.22). I have been unable to find the "broken" version which might be useful for comparison purposes if it could be found.

Thank you for confirming the continued existence of the problem. My 49g+ is back to the HP firmware and I have acquired another HP50g to run newRPL on!

Nigel (UK)