I'm sorry, maybe I wasn't fully clear in my original post. I am fully aware that SD cards are not the same thing as the "cards" specified in the Dm calls.
What I wasn't aware, but seems to be the case, is that the Dm calls will not find or use PDBs if they are on an SD card.
This is the case, correct?
So even if a user installs an application on SD card to save main memory space, any extra PDBs must be installed in main memory, typically?
Yes, although there are VFS calls to read records out of a PDB file on a expansion card; you can also use the bundle bits in the PRC/PDB header to mark a set of databases as attached to your program, so when the user launches the application from the card, the PDBs will be copied to the device along with the main application.
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