CHAPTER 3 MEMORY ORGANISATION 3. MEMORY ORGANISATION The ROM and RAM memory system will be investigated in this chapter. 3.1 System address map Figure 3-1 shows the system address map. The CPU address space can be divided into four areas: a) ROM (Read Only Memory) b) RAM (Random Access Memory) c) I/O (Input / Output) d) Hardware page Fig. 3-1 System address map 3-1