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Exam 21: Microprogrammed Control

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Question 1

Multiple Choice

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Which of the following is a LSI-11 microinstruction?

A) add word
B) test word
C) Jump
D) all of the above

E) B) and C)
F) A) and B)

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Question 2

Multiple Choice

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A _________ is a combinatorial circuit that generates an address based on the microinstruction,the machine instruction,the microinstruction program counter,and an interrupt register.

A) microsequencer
B) vertical microinstruction
C) translation array
D) control word

E) B) and D)
F) B) and C)

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Question 3

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The __________ approach involves the use of a microinstruction address that has previously been saved in temporary storage within the control unit.

When a microinstruction is read from the control memory it is transferred to a _________.

The __________ generated by a microinstruction are used to cause register transfers and ALU operations.

An alternative,which has been used in many CISC processors,is to implement a __________ control unit.

_________ is a subfield that is used to indicate a conditional branch.

The standard IBM 3033 control memory consists of ________ words.

The TI 8800 Software Development Board is a microprogrammable 32-bit computer card.

_________ processors,with their simpler instruction format,typically use hardwired control units.

The degree of packing relates to the degree of identification between a given control task and specific microinstruction bits.

Which of the following is a control unit input?

Each microinstruction cycle is made up of two parts: fetch and _________.

The _________ contains the address of the next microinstruction to be read.

With _________ encoding one field is used to determine the interpretation of another field.

The principal function of the 8818 __________ is to generate the next microinstruction address for the microprogram.

Microprogramming became a popular technique for implementing the control unit of CISC processors.

In a __________ microinstruction every bit in the control field attaches to a control line.

The terms __________ relate to the relative width of microinstructions.

It is more difficult to write a firmware program than a software program.