DB48X: HP48-like RPL implementation for DM42

[c3d]

(07-10-2023 01:19 PM)spiff72 Wrote:  an you answer a basic question about how the DM42 runs these alternate calculators?

Does DB48X run alongside the existing DM42 calc firmware? (Is it just a program that you can exit from and go back to the DM42 calculator?) Could you have DB48X and C47 BOTH available and switch between them?

You can have them both on the FAT partition and load them alternatively. This involves a reflashing, but it takes about 30 seconds. I plan to do a video update on YouTube showing this process.

Both the DM42 and DB48X programs can save state to disk and reload some saved state automatically on program restart. You can have as many such state files as you want, but the name of the last state file you used intentionally persists across resets. However, since DM42 and DB48X can't use each other's files, when you switch, you start with a "Memory Clear" and need to explicitly load a state file of the correct kind. So the switch with state takes 10-20 seconds more to go through the menus and select the state file. All in all, it takes less than a minute to switch to another "mode" (but it's not instantaneous).