Backing up HP28s user data via IR port

[DavidM]

(01-09-2023 11:57 PM)EugeneNine Wrote:  The 48 will speak kermit wired or IR

I don't believe the 28 has bi-directional IR capability, and likewise doesn't have any documented support for communications (other than some printing commands, of course).

It may be possible to run the INPRT command on a 48sx or 48gx to receive the results of a print command issued on the 28. I don't believe there's a version of INPRT for the 49/50 platforms, though.

Does anyone have both a 28S and a 48sx/gx that they could try this on? The description for INPRT includes this comment:

Quote:"For the HP 28, HP 18C, and HP 19B: Just line up the calculator's LED between the E and T of HEWLETT on the HP 48's Hewlett-Packard logo."

So it appears that it may work to at least get your programs in text form.