Tags |
|
|
Links |
|
|
Atricle Dump - History of the Computer - Machine Code Programs Part 2 of 3
There’s no getting away from it, design and development projects are a nightmare to manage successfully, particularly the development of software. Nonetheless, in these days of customers requiring ever increasing functionality and ever more sophisticated technology, they are sometimes necessary.Your company almost certainly has procedures in place such as Make or
How do we get data into those registers 000 and 001? We have a STORE instruction. This time the format is:-
000 011 000
Once again the first 3 bits are the command - STORE. The next 3 bits are the data, decimal 3 i
There is more to Orlando than Disney and theme parks that escalated Orlando's economy and growth. Orlando has a varied community and great neighborhoods along with good schools and health care. Natural beauty is abundant with plenty of lakes around Orlando real estate.It is worthwhile to remember that when you are looking at the Orlando real estate market, it is on
Other registers would be used to store data to be added, and for the result, they could also be for data to be sent to a disk or tape drive.
We will look at a simple program to calculate the area of a rectangle. We can use any dimensions using this program, we will use 3x4 for illustration purposes. For this example we only have 5 instructions we can use, an ADD, a SUBTRACT, a STORE, a BRANCH and a STOP. The stop isn't strictly a normal instruction, but serves the purpose here.
The program is in memory from location zero onwards and looks like this:-
(0)000 - 000 011 000 STORE
(1)001 - 000 100 001 STORE
(2)010 - 001 000 010 ADD
(3)011 - 010 001 001 SUBTRACT
(4)100 - 011 001 010 BRANCH
(5)101 - 100 000 000 STOP
The format for these instructions, or the way the bits are laid out, determines what the instruction does, and what data it uses. We are using a format devised for this illustration. For example here is an ADD instruction
001 001 010
The first three bits are the 'command', or what the instruction does. 001 is decoded as an ADD. The rest of the instruction tells us what to add. The next three bits are the address of the register to be added. The last three bits are the register to be added to. This instruction will take the contents of register 000 and add them to the contents of register 010. The result will be placed in register 010.
How do we get data into those registers 000 and 001? We have a STORE instruction. This time the format is:-
000 011 000
Once again the first 3 bits are the command - STORE. The next 3 bits are the data, decimal 3 in
What is New York Lemon Law?If you buy, lease or transfer a car or motor home, new or used, and it develops serious defects that cannot be fixed by the manufacturer you can get even with the dealer or manufacturer under a law called New York Lemon Law regardless of the warranty clause or waiver signed by you.What defects qualify for redress?New York Le
We will look at a simple program to calculate the area of a rectangle. We can use any dimensions using this program, we will use 3x4 for illustration purposes. For this example we only have 5 instructions we can use, an ADD, a SUBTRACT, a STORE, a BRANCH and a STOP. The stop isn't strictly a normal instruction, but serves the purpose here.
The program is in memory from location zero onwards and looks like this:-
(0)000 - 000 011 000 STORE
(1)001 - 000 100 001 STORE
(2)010 - 001 000 010 ADD
(3)011 - 010 001 001 SUBTRACT
(4)100 - 011 001 010 BRANCH
(5)101 - 100 000 000 STOP
The format for these instructions, or the way the bits are laid out, determines what the instruction does, and what data it uses. We are using a format devised for this illustration. For example here is an ADD instruction
001 001 010
The first three bits are the 'command', or what the instruction does. 001 is decoded as an ADD. The rest of the instruction tells us what to add. The next three bits are the address of the register to be added. The last three bits are the register to be added to. This instruction will take the contents of register 000 and add them to the contents of register 010. The result will be placed in register 010.
How do we get data into those registers 000 and 001? We have a STORE instruction. This time the format is:-
000 011 000
Once again the first 3 bits are the command - STORE. The next 3 bits are the data, decimal 3 i
How To Find a Hobby That Suits YouIf gardening is not your hobby but you are looking to find something to do with your spare time you might want to browse around for craft and hobby themed e-books on various activities and past times. If scrap booking is your choice of pastime you will want to choose which way you will pursue it in. Ebook guides on poems,
The program is in memory from location zero onwards and looks like this:-
(0)000 - 000 011 000 STORE
(1)001 - 000 100 001 STORE
(2)010 - 001 000 010 ADD
(3)011 - 010 001 001 SUBTRACT
(4)100 - 011 001 010 BRANCH
(5)101 - 100 000 000 STOP
The format for these instructions, or the way the bits are laid out, determines what the instruction does, and what data it uses. We are using a format devised for this illustration. For example here is an ADD instruction
001 001 010
The first three bits are the 'command', or what the instruction does. 001 is decoded as an ADD. The rest of the instruction tells us what to add. The next three bits are the address of the register to be added. The last three bits are the register to be added to. This instruction will take the contents of register 000 and add them to the contents of register 010. The result will be placed in register 010.
How do we get data into those registers 000 and 001? We have a STORE instruction. This time the format is:-
000 011 000
Once again the first 3 bits are the command - STORE. The next 3 bits are the data, decimal 3 i
Let’s face it, the entire world is moving to electronic payments. The reason is obvious. Electronic payments are safe, fast, and easy to track. Funds are accessible to your workforce quickly. Most importantly, electronic payments can save your company money. You can issue paper checks but what happens when they are stolen or lost? Also, tracking paper checks around the w
001 001 010
The first three bits are the 'command', or what the instruction does. 001 is decoded as an ADD. The rest of the instruction tells us what to add. The next three bits are the address of the register to be added. The last three bits are the register to be added to. This instruction will take the contents of register 000 and add them to the contents of register 010. The result will be placed in register 010.
How do we get data into those registers 000 and 001? We have a STORE instruction. This time the format is:-
000 011 000
Once again the first 3 bits are the command - STORE. The next 3 bits are the data, decimal 3 i
Evaluating your candidate is part of the investigative process in job hiring. The increased competition for jobs in today’s markets has resulted in constant pressure upon jobseekers – and as a result least 30% of them fabricate their resumes at any given time. As an employer, hiring a candidate that has provided false or misleading information about experience, skills and
How do we get data into those registers 000 and 001? We have a STORE instruction. This time the format is:-
000 011 000
Once again the first 3 bits are the command - STORE. The next 3 bits are the data, decimal 3 in this case, the last three are where to store it - in register 0. We will put decimal 3 in register 0.
The SUBTRACT instruction is telling us to subtract a value, in this case 1, from the contents of register 1. The result goes in register 1. (An extra bit not shown here would tell the logic to decode the literal, or actual, value of 1 rather than the address of a register).
The BRANCH instruction is what makes programs capable of powerful things, it is a decision maker. The format is
011 001 010
The first 3 bits are interpreted as a BRANCH instruction and enable logic to decode the rest of the instruction. the next 3 bits are the address of a register to test, and the last 3 bits an address in memory to be used to get the next instruction if the test is not met. Various tests are possible, in this case we are testing for 'not 0'.
The STOP is used here for this illustration only, normally the program would continue.
HTTP = HTML link (for blogs, profiles,phorums):
<a href="http://www.articledump.net/article/170361/articledump-History-of-the-Computer--Machine-Code-Programs-Part-2-of-3.html">History of the Computer - Machine Code Programs Part 2 of 3</a>
BB link (for phorums):
[url=http://www.articledump.net/article/170361/articledump-History-of-the-Computer--Machine-Code-Programs-Part-2-of-3.html]History of the Computer - Machine Code Programs Part 2 of 3[/url]
Related Articles:
Email Marketing - Building Relationships is Key I
Websites: Virtual Real Estate Investment Business with Minimum Risk
Suggestions for Writing Successful Query Letters
Bookmark it:
|