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Assignment 2 Description
Assignment 2 - Transla!ng Virtual
Machine Code
Weigh!ng and Due Dates
Marks for this assignment contribute 10% of the overall course mark.
Marks for functionality will be awarded automatically by the web
submission system.
Due dates: Milestone - 11:55pm Tuesday of week 9, Final - 11:55pm
Friday of week 9.
Late penalties: For each part, the maximum mark awarded will be
reduced by 25% per day / part day late. If your mark is greater than the
maximum, it will be reduced to the maximum.
Core Body of Knowledge (CBOK) Areas: abstraction, design,
hardware and software, data and information, and programming.
Project Description
In this assignment you will complete a variation of projects 7 and 8 in the
nand2tetris course. You will complete a program, translator, which will read
a Hack Virtual Machine file and output a Hack Assembly Language
translation of each Virtual Machine command. The output will be in a form
suitable for testing by the precompiled executable program bin/simulator.
SVN Repository
Note: this assignment assumes that you have already created directories
for every assignment, workshop, project and exam in your svn repository, as
described on the Startup Files for Workshops and Assignments
(https://myuni.adelaide.edu.au/courses/54311/pages/startup-files-for-workshopsand-assignments)
page.
1. If required, checkout a working copy of the assignment2 directory from
your svn repository.
2. Change directory to the working copy of the assignment2 directory.
3. Copy the newest zip file attached below into the updates sub-directory
and add it to svn.
4. Run the following command to place the assignment's startup files in the
correct locations:
% make install
5. Add the tokensier.cpp file and an empty tests directory to your svn
repository:
% svn add translator.cpp
% svn add --depth=empty tests
% svn commit -m "Assignment 2 Startup Files"
Assignment 2 Files and Directories
In addition to the generic Makefile and updates sub-directory, the
assignment2 directory should now contain the following files and directories:
translator.cpp - C++ source file.
translator - executable script that will run your compiled
translator program.
bin - this directory contains precompiled programs and scripts.
includes - this directory contains .h files for the library.
lib - this directory contains precompiled library components.
originals - this directory contains the original version of the
translator.cpp.
tests - this directory contains test data, you can add your own tests
here.
Note: you need to edit the translator.cpp file to complete this assignment.
All the other files are automatically regenerated every time you run
make, they must not be changed or added to svn. You can add extra test
inputs to the tests directory but those are the only additional files that you
may add to svn.
may add to svn.
Note: if a newer version of the startup files is made available, it must be
placed in the updates sub-directory and added to svn. The next time make
is run, all of the files will be updated except for transator.cpp.
Submission and Marking Scheme
Submissions for this assignment must be made to the web submission
system (https://cs.adelaide.edu.au/services/websubmission) assignment
named: Assignment 2 - Submit Here. The assessment is based on
"Assessment of Programming Assignments
(https://myuni.adelaide.edu.au/courses/54311/pages/assessment-ofprogramming-assignments)
".
Note: the Submit Here assignment will show a breakdown of your marks
by category but it will always show your total mark as 0.
Your programs must be written in C++. Your programs will be compiled
using the Makefile included in the zip file attached below. The translator
program will be compiled using the file translator.cpp file. No other .cpp or
.h files should be present in your svn directory. Your programs will then be
tested using a small set of Hack Virtual Machine files. You may assume that
the first command in each test will be a function command so that you will
always know the correct class and function name to use when constructing
labels.
Note: the simulator tests each virtual machine command implementation
separately so the overall failure of a test could still result in a significant
number of marks for those individual virtual machine command
implementations that behaved correctly.
Assignment 2 - Milestone Submissions: due
11:55pm Tuesday of week 9
The marks awarded by the web submission system
(https://cs.adelaide.edu.au/services/websubmission) for the milestone
submission contribute up to 20% of your marks for assignment
2. Your milestone submission mark, after the application of late penalties,
will be posted to the myuni gradebook when the assignment marking is
complete.
Automa!c Marking
The Milestone Tests are the same as the Final Tests but, marks will only be
recorded for those tests that require a complete implementation of the
following virtual machine commands:
You can view the Milestone Tests marks in the Milestone assignment but
submissions must be made using the Assignment 2 - Submit
Here assignment.
Assignment 2 - Final Submissions: due 11:55pm
Friday of week 9
The marks awarded for the final submission contribute up to 80% of your
marks for assignment 2.
Your final submission mark will be the geometric mean of three
components, the marks for the Final Tests, a mark for your logbook and a
mark for your code. It will be limited to 20% more than the marks for the
Final Tests. See "Assessment - Mark Calculations
(https://myuni.adelaide.edu.au/courses/54311/pages/assessment-mark-
(https://myuni.adelaide.edu.au/courses/54311/pages/assessment-markcalculations)
" for examples of how the marks are combined. Your final
submission mark, after the application of late penalties, will be posted to the
myuni gradebook when the assignment marking is complete.
NOTE - A logbook mark of 0 results in a Final Submission mark of 0.
You can view the Final Tests marks in the Final assignment but
submissions must be made using the Assignment 2 - Submit
Here assignment.
Logbook Marking
Important: the logbook must have entries for all work in this assignment,
including your milestone submissions. See "Assessment - Logbook
Review (https://myuni.adelaide.edu.au/courses/54311/pages/assessmentlogbook-review)
" for details of how your logbook will be assessed.
Code Review Marking
For each of your programming assignments you are expected to submit well
written code. See "Assessment - Code Review
(https://myuni.adelaide.edu.au/courses/54311/pages/assessment-code-review) "
for details of how your code will be assessed.
Assignment 2 - Par!cipa!on Marks
Any submissions to assignment 2 that are made before the due date for
Milestone Submissions may be awarded up to 10 participation marks. The
participation marks will be the marks awarded for the Final Tests divided by
10. You can view the participation marks awarded in the Pre
Milestone assignment but submissions must be made using
the Assignment 2 - Submit Here assignment. The participation marks will
be allocated to week 8.
Virtual Machine Translator
Background
This assignment requires you to complete the implementation of the Hack
Virtual Machine translator program. You should have started working out
how to implement VM commands in Hack Assembler in workshop 07. It
would be a good idea to revisit workshop 07 before continuing with this
assignment.
The translator.cpp file contains a recursive descent parser that will
recognise Hack VM commands and call a C++ function to output a Hack
Assembly language implementation of each kind of VM command it parses.
You are required to edit the translator.cpp file and complete each of the
translation functions. Do not modify the other parts of the translator.cpp
file.
The translation functions must output Hack Assembly language by calling
the function, output_assembler(), which is passed a single line of Hack
Assembly language or a comment. Each translation function starts and
ends with start_* and end_* functions so that program output will be in a
form suitable for testing by the precompiled executable
program bin/simulator.
Remember to keep your logbook up to date when working on this
assignment and make svn commits when you add new logbook entries.
Startup Files
The newest of the following zip file(s) must be placed in the updates subdirectory
and added to svn. When make is run, the newest zip file in the
updates directory is used to update the startup files. Any files you are
required to edit will not be updated but, a copy of the latest version of those
files will be placed in the sub-directory originals.
assignment2-20200923-135641.zip
(https://myuni.adelaide.edu.au/courses/54311/files/7490998/download?
wrap=1)
assignment2-20200923-120412.zip

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