You can't rely on the OS version number to tell you whether the memory card is supported or not. True, you need at least version 4.0 of the SDK to compile a program that uses the VFS manager - but there have been devices running an older version of the OS (e.g., 3.0.1H) that nevertheless supported memory cards with some custom libraries. See, for instance, this
http://homepage.ntlworld.com/john.r.wells/VFS_Tut.htm If you disassemble some code that uses the VFS Manager, you'll see that all the functions are basically compiled to calls to the undocumented function FileSystemDispatch (system trap 0xA348), so, theoretically, anybody could provide their own VFS Manager interface by patching this system trap on the earlier versions of the OS. If you want to know whether the VFS Manager is present on a particular device, use the method described on the Web page mentioned above. Regards, Vesselin -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
