Zero Page (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The zero page is the series of memory addresses at the absolute beginning of a computer's address space; that is, the page whose starting address is zero. The size of a "page" depends on the context, and the significance of zero-page memory versus higher addressed memory is highly dependent on machine architecture. For example, the MOS Technology 6502 processor treats the first 256 bytes of memory specially, whereas many other processors do not. The actual size of the zero page in bytes is determined by the microprocessor design and in older designs, is often equal to the largest value that can be referenced by the processor's indexing registers. For example, the aforementioned 6502's index registers' size is 8 bits and the page size is 256 bytes. Therefore, its zero page extends from address 0 to address 255.