题目内容

Control unit use some input signals to produce control signals that open the gates of information paths and let the micro-operations implement. Which is NOT the input signals of control unit?

A. clock and flags
B. instruction register
C. interrupt request signal
D. memory read or write

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TheREGISTER ADDRESSING has very less address space, but it has (is) _________________.

A. very less value range
B. very fast
C. more memory access
D. complex address calculation

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In register indirect addressing, the effective address of operand is stored in____.

A. register
B. main memory
C. instruction
D. PC

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Compared with indirect addressing mode，the advantage of register indirect addressing mode is________.

A. Large address space
B. Multiplememory reference
C. Limit address space
D. Less memory access

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Inbase-register addressing mode, the address of operand is equal to__________.

A. The content of base-register plus displacement
B. The content of index-register plus displacement
C. The content of program counter plus displacement
D. The content of AC plus displacement

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Control unit use some input signals to produce control signals that open the gates of information paths and let the micro-operations implement. Which is NOT the input signals of control unit?

A. clock and flags B. instruction register C. interrupt request signal D. memory read or write

TheREGISTER ADDRESSING has very less address space, but it has (is) _________________.

In register indirect addressing, the effective address of operand is stored in____.

Compared with indirect addressing mode，the advantage of register indirect addressing mode is________.

Inbase-register addressing mode, the address of operand is equal to__________.

A. clock and flags
B. instruction register
C. interrupt request signal
D. memory read or write