Framiga wrote:
Never heard before too!! it should be a "nonsense" and unusefull behaviour!
Just to check my reasoning, I located my A3k schematics, C= P/N 314677-01. The clock and ROM chips are on sheet 3. It clearly show that the battery never powers the ROM. In fact, unless D191 were to fail, no current could flow from the battery to the 5V rail.