Implementing EPROM in 8085 Microprocessor

The required EPROM memory capacity of the system can be implemented in one IC or in multiple ICs. Similarly, the RAM capacity of the system can be implemented in one IC or in multiple ICs. This choice depends on the availability of memory IC and the system designer. Some examples of memory organizations for the 8085 microprocessor-based systems are given below:

Consider a system in which the full memory space of 64kb is utilized for EPROM memory. In this system, the entire 16 address lines of the processor are connected to address input pins of memory IC in order to address the internal locations of memory and the Chip Select (CS) pin of EPROM is permanently tied to logic low (i.e., tied to ground) as shown in below figure. Now the range of address for EPROM is 0000H to FFFFH.