- To do this project, you need to obtain a copy of the
prepared file hw1.s
into your cs255 project directory
using EGTAPI
- Watch this video on how to get the prepared files for this homework (and other homework/project): click here
-
After you obtained the prepared file,
you must enter your answers to homework 1 into the
prepared file "hw1.s".
You can use EGTAPI to edit your copy of the file "hw1.s" and enter the answers for this homework.
- Watch this video on how to edit and save files using EGTAPI: click here
Note: When you're done, you must turnin your work
See the end of this write up for instructions on how to turn in this assignment.
- Name one (1) non-programmable machine that was invented to help humans perform computations.
- Name one (1) non-electrical machine that is programmable, i.e.: the machine can change its programming (= can perform different variants of a task)
- Give the 4 categories of components in a computer.
- Give the 2 components in a computer system.
- Give an example of a peripheral device that can
perform both input and output operations.
- What is the functiuon of the CPU (Central Processing Unit) ?
- What is the function of the computer memory (RAM) ?
- Where are all the instructions of a computer program stored ?
- Where are all the variables of a computer program stored ?
- Which component in the computer system execute the instructions of a computer program ?
- How is a memory cell in the computer memory (RAM) identified, i.e.: what do you use to distiniguish different memory cells.
- Which bus in the system bus carries (= transmits) the memory identifying information from the CPU to the memory ?
- Which bus in the system bus is used to transfer data between the CPU and the memory ?
- Which bus in the system bus contains the Read/Write signal ?
- Which bus is used by the CPU to send the value of its Program Counter to the memory ?
- What is a bit ?
- How many bits are in a byte in modern computers ?
- Show all the binary number patterns that 1 bit can store.
- Show all the binary number patterns that 2 bits can store.
- How many different binary number patterns can 1 byte store ?
- Consider the following content of the computer memory:
- Can the bytes at memory location 4000 and 4001 be combined to make a larger memory unit ?
- If you answer yes to the above question, then: how many different binary number patterns can the cobined memory unit store ?
- Can the bytes at memory location 4000 and 4002 be combined to make a larger memory unit ?
- Can the bytes at memory location 4000, 4001 and 4002 be combined to make a larger memory unit ?
- Can the bytes at memory location 4001 and 4002 be combined to make a larger memory unit ?
- What type (kind) of numbers are stored inside a computer memory ?
- Name the 2 operations that the CPU can perform on the computer memory.
- If the data bus has 16 wires, how many bytes can the data bus transfer in one read/write operation ?
- If the address bus has 16 wires, what is the maximum memory size of this computer (i.e., how many bytes maximum can the memory contain) ?
- If the address bus has 34 wires, what is the maximum memory size of this computer (i.e., how many bytes maximum can the memory contain) ?
- For this question, you need to search online for
Morse code
Or you can use this Wikipedia page
The Morse code is a signalling code designed to transmit English text by raido pulses (beeps).
We denote a short pulse as • (dot) and a long pulse as - (dash)
Decode this message in Morse code:
•••• • •-•• •-•• --- Message: - For this question, you need to search online for binary ASCII code
The ASCII code is a binary code to represent the English characters
Decode this message in ASCII code:
01000110 01101001 01110011 01101000 Message: - Suppose you are given the following binary number:
01000001 Corresponding decimal number:What is the decimal number that corresponds to this binary number ?
- Suppose you are given the following binary number:
01000001 Character represented by ASCII code:What is the character that is represented by this binary number ?
- Make a correct English sentence that
starts with:
I is
- What is the purpose (in terms of usage) of the general purpose registers ?
- What are the 2 kinds of operations that the ALU can perform ?
- What is the purpose (in terms of usage) of the Program Counter (PC) ?
- What is the purpose (in term of usage) of the Instruction Register (IR) ?
- What is the purpose (in term of usage) of the Processor Status Register (PSR) ?
- The CPU repeated execute a series of steps to execute an instruction. What is the term used to describe this series of steps ?
- Which device in the computer will the CPU access to obtain a new instruction ?
- How does the CPU prepare itself to get a new (different) instruction in each execution cycle ?
- Which component inside the CPU will provide the operands for computer instructions - be very specific with your answer, include the adjective if any ?
- Which component inside the CPU is used to store the results of computer instructions - be very specific with your answer, include the adjective if any ?
-
Suppose the Program Counter contains the value 4000 and
assume that each computer instruction is stored in 1 byte of memory.
- Which instruction code will the CPU fetch from
the memory next ? The answer is a binary number !
- Which register inside the CPU is used to store this
instruction code ?
- Let's call the next instruction that was fetched (= your answer to
the first part of this question):
instruction instrX.
Suppose the instruction instrX updates a general purpose register R0 to 4000.
In this case, which is the next instruction that will be fetched from memory after the CPU finished executing instrX ?
The answer is a binary number !
- Suppose the instruction instrX updates the
Program Counter PC to 4000.
In this case, which is the next instruction that will be fetched from memory after the CPU finished executing instrX ?
The answer is a binary number !
- What is the name of the program phenomenon exhibited by the program behavior in the previous question that you have learned in CS170 or any "Intro to CS course" (where the Program Counter is updated by 4000) ?
This is a partial content of the computer memory:
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- You can make and receive extension requests for a homework/project
as long as you have not exceeded the maximum requests allowed.
Extension requests must be made before the assignment is due !!!
"Free" extension requests are granted for illness and family emergencies.
To make an extension request, do the following in EGTAPI:
1. Click on File Browser in EGTAPI 2. Click on Req ext (lower right corner) in the File Browser menu The "Egtapi Extension Request" window will pop up:
3. In the "Section Number" drop down tab:
Select "1" if you are in Section 1
Select "2" if you are in Section 2
4. Enter "Project Code": hw1
5. Click the "Request extension" button
6. You will see the request result in the right most panel.
If your request is successfull, you will see:
Extension request was successful:
Turn hw1 in before ..... (new due date)
in the "Request extension" pop up window (you may need to scroll down)
- Alternately,
you can request an extension
by executing the following
command
inside the EGTAPI terminal:
/home/cs255001/req-ext hw1 // If you're in section 1 or /home/cs255002/req-ext hw1 // If you're in section 2You request will be successful if you have not exceeded the maximum number of "free" (no-questions-asked) requests allowed
-
Important note:
- You must
turn in your program to complete the assignment !!!
- You must turn in each assignment before its due date (unless you have requested an extension).
- The easiest way to turn in
your work is
using EGTAPI
Watch this video on how to turn in a file with EGTAPI: click here
- Here are the written instructions explained in the video:
1. Click on File Browser in EGTAPI 2. Select the file that you want to turn in
In this case, select the file "hw1.s" inside your hw1 folder
3. After selecting the file (in this case: "hw1.s"), click Turnin in the File Browser menu
The "Egtapi Turn-in" window will pop up:
4. In the "Section Number" drop down tab:
Select "1" if you are in Section 1
Select "2" if you are in Section 2
5. Enter "Project Code": hw1
6. Click the "Turn in" button
7. You will see the turn in result in the right most panel.
Make sure that your see the message: "Program ... has been successfully turned in..."
Alternately, you can turn in your file using the EGTAPI Terminal:
1. Open the EGTAPI Terminal (click on "Terminal") 2. Enter these command in the lower input area of the Terminal panel: (a) cd ~/cs255/hw1 (go to your hw1 folder) (b) /home/cs255001/turnin hw1.s hw1 // If you're in section 1 or (b) /home/cs255002/turnin hw1.s hw1 // If you're in section 2If you want to see what you have turned in, then
1. Open the EGTAPI Terminal (click on "Terminal") 2. Enter this command in the lower input area of the Terminal panel: /home/cs255001/turnin // If you're in section 1 or /home/cs255002/turnin // If you're in section 2
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