HP 50g & SD Cards: Performance, Format, Notes

[JDW]

Claudio,

Thank you for the detailed information.

I was able to STO data on the SD per your advice. I could RCL the data on the calc and I verified the file was there using my iMac too. So this proves that there is a hardware problem with my 50g (drat refurbished units!) with regard to the SD card lock detector mechanism.

I think newRPL is very exciting in that the aim of the project is to rewrite the OS to be native on ARM and therefore significantly faster for many operations. But for practical use right now, I really do need to move back to the normal firmware 2.15.

So the question at this point is, does anyone have a code hack for 50g firmware 2.15 that would cause it to ignore the SD card Lock detector? Surely there must be some means of accomplishing that feat?

Now, what appears to be a NEW PROBLEM...

Previously, I had the 3 main libraries stored in Flash (EQNDATA.LIB, EQNLIB.LIB, and PRTBL.LIB). I then flashed my 50g with newRPL and then today I flashed it back to the stock 2.15 firmware. Now nothing appears when I press the ORG Rt-Arrow button and 2 (to call up Libraries). That was to be expected, but in File Manager, I see Port 2 (the FLASH) to be 510k. That is not right. It should be 766k (from what I have read in HP's "hp50g ROM Upgrade.pdf"). And yet, when I view Port 2 in File Manager, it is blank. When I copy L226, L227 & L229 back to Port 2 (FLASH) using my SD card, the size of Port 2 (FLASH) is 415k. Is this right? If not, how do I fix it?