MEMORY ORGANISATION The 65C02 has 16 address lines. It can only access 64K bytes of memory. In order to access more than 64K bytes of memory, the bank-switching technique is employed. There are bank registers to map the physical memory to the 64K-byte logical address space. 3.2 ROM The ROM consists of three parts: a) BASIC interpreter b) System monitor c) I/O drivers Fig. 3-2 ROM mapping 3-2