Likely from making "undocumented" ROM calls. Radio Shack used to warn against it for their other computers. Wasn't always a problem since they rarely updated the ROM on any given computer line over time.
But since the 100 and 102 were supposed to be interchangeable (and really are the same computer line), but we know that the ROMs are different (due to bug fixes, etc.), even though the documented ROM calls are the same. Regards, Peter > >
