A microprocessor employs RAM chips of 256 X 8 and ROM Chips of 1024 X 8. The mic

Question

A microprocessor employs RAM chips of 256 X 8 and ROM Chips of 1024 X 8. The microcomputer system needs 2K bytes of RAM. 4K bytes of ROM, and four interface units, each with four registers. A memory -mapped I/0 configuration is used. The two highest- order bits of the address bus are assigned 00 for RAM, 01 for ROM and 10 for interface registers. a) how many RAM and ROM chips are needed? b) Draw a memory-address map for the system. c) Give the address range in hexadecimal for RAM, ROM and interface.

Explanation / Answer

16kB of ROM and 48KB of RAM

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