Detecting presence of SD-card on HP-50g

[DavidM]

(07-17-2021 10:36 PM)BINUBALL Wrote:  Edited) And recently I warmstart 50g, it gives invalid card data. Claudio's program now working with PushF/TLoop. Strange behavior, for yesterday I remembered it worked with PushT/FLoop.

Edited) After warmstart 50g, on port 0, has strange external files which 2 bytes. I can list some of strange file. Sometimes if I tried to go port 0, insufficient memory happens.

ROMPTR 0 12
...
PTR F77E6
And so on..

You were editing this about the same time I was typing my last response.

It looks like your card's filesystem may be corrupted. See Claudio's post above for some potential causes for how this may have happened.

It's probably a good time to backup the contents of the card and attempt a format/restore sequence.