Explain about micro-instruction formats, Computer Engineering

Assignment Help:

Q. Explain about Micro-instruction Formats?

Now let's focus on format of a micro-instruction. The two widely used formats employed for micro-instructions are vertical and horizontal. In horizontal micro-instruction every bit of micro-instruction signifies a control signal that directly controls a single bus line or occasionally a gate in the machine. Though the length ofsuch a micro-instruction can be hundreds of bits. A typical horizontal micro-instruction with its related fields is demonstrated in Figure below.

2317_Explain about Micro-instruction Formats.png

(a)   Horizontal Micro-instruction

1906_Explain about Micro-instruction Formats1.png

(b)   Vertical Micro-instructions

1052_Explain about Micro-instruction Formats2.png

Figure: Micro- instruction Formats

In a vertical micro-instruction several similar control signals can be encoded in a few micro-instruction bits. For example for 16 ALU operations that may need 16 individual control bits in horizontal micro-instruction only 4 encoded bits are required in vertical micro-instruction. In the same way in a vertical micro-instruction only 3 bits are required to select one of eight registers. Though these encoded bits need to be passed from the respective decoders to get the individual control signals. This is shown in figure above.

Generally a horizontal control unit is faster however requires wider instruction words while vertical control units though; require a decoder are shorter in length. Most of systems employ neither purely vertical nor purely horizontal micro-instructions figure (c) above.


Related Discussions:- Explain about micro-instruction formats

QUELING SYTEM , SHOW THAT AVERAGE NUMBER OF UNIT IN A (M/M/1) QUELING SYTEM...

SHOW THAT AVERAGE NUMBER OF UNIT IN A (M/M/1) QUELING SYTEM IS EQUAL TO P/(1-p). NOTE:P=ROW

Define restoring method, Define restoring method? The hardware method j...

Define restoring method? The hardware method just explained is called the restoring method. The reason for this name is that the partial reminder is restored by adding the divi

Design tables in html, In this portion you would see how to put tables in y...

In this portion you would see how to put tables in your web documents. It isn't that a table is simply a combination of rows and columns. If you have ever seen any table in an attr

Illustrate the text area, specifies a form field where user can enter large...

specifies a form field where user can enter large amounts of text. In most respects, works like an field. It can have a name as well as a def

Software interface, what is software interface #Minimum 100 words accepted...

what is software interface #Minimum 100 words accepted#

Cisc approach - cisc architecture, CISC Approach - CISC architecture: ...

CISC Approach - CISC architecture: The main goal of CISC architecture is to finish a task in as few lines of assembly as possible as. This is gain by building processor hardwa

Describe method overloading, Method overloading is to overload methods usin...

Method overloading is to overload methods using similar class name by writing different parameters. This is known as Method Overloading.

Accessing the operands - assembly language, Accessing the Operands: ...

Accessing the Operands: operands are usually place in one of two places: -registers (32 int, 32 fp) -memory (232locations) registers are -simple to spe

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd