A computer has 128GB of word addressable memory and a word size of 32 bits. The

Question

A computer has 128GB of word addressable memory and a word size of 32 bits. The word size tells you not only how large a datum is but is also needed to determine the size of an address. The computer is able to send 2 words at a time over the database. The computer has 82 control signals that it sends from the control unit out onto the system bus and there are 32 devices that can send interrupt signals to the CPU. Use this information to determine the size of the system bus in bits, showing each of the size of the address bus, data bus, control bus and the overall size of the bus

Explanation / Answer

The memory has 32 Gwords, which require only 35 address lines. However the memory can be accessed 2 words at a time reducing the address bus to 34 bits.

Address bus = 34 bits
Data bus (2 words) = 64 bits
Interrupt lines (32) = 32 lines.
Control bus (82 - 34 - 32) = 16 lines
Total = 146 lines.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.