Читать книгу Microprocessor 4 - Philippe Darche - Страница 37

The modes studied so far are those that are currently available. Some modes have been abandoned because they are complex or not useful. For example, pagezero and direct paged modes (microprocessor IM6100 from Intersil) with current memory sizes are no longer required. We also mention truncation, which consists of deleting the most significant address bits to adapt to addressing capacity in the storage hierarchy considered (Brooks 1962).