A computer employs RAM chips of 512 x 4 and ROM chips of 256 x 8. The computer system needs 1KB of RAM, and 512 x 8 ROM and an interface unit with 256 registers each. A memory-mapped I/O configuration is used. The two higher -order bits of the address bus are assigned 00 for RAM, O1 for ROM, and 10 for interface. a) How many lines must be decoded for chip select? Specify the size of the decoder b) Draw a memory-address map for the system and Give the address range in hexadecimal for RAM, ROM c) Develop a chip layout for the above said specifications.

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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A computer employs RAM chips of 512 x 4 and ROM chips of 256 x 8. The computer system needs 1KB of RAM, and 512 x 8 ROM and an interface unit with 256 registers each. A memory-mapped I/O configuration is used. The two higher -order bits of the address bus are assigned 00 for RAM, O1 for ROM, and 10 for interface. a) How many lines must be decoded for chip select? Specify the size of the decoder b) Draw a memory-address map for the system and Give the address range in hexadecimal for RAM, ROM c) Develop a chip layout for the above said specifications.
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