Team-2D Team members: tandoni yangr zhangq2 zhangx2

Usage

Executables files can be built with the make command. make -- creates everything, and loads into floppya.img After you have all the components built, you can use make run to run the program. So the commands to enter are make, followed by make run.

Alternatively, you can build each component one at a time as well.

• make bootload -- create bootload
• make kernel -- crate kernel
• make loadFile -- create loadFile
• make shell -- create shell
• make load -- load files into floppya.img

After you finish testing, you can run

• make clean -- cleans assembly and object files

What we did

Milestone 3

Here's what we did for Milestone 3:

1. Added the following functionality in kernel.c:
   • void readFile(char *filename, char *buffer);
   • void executeProgram(char* name, int segment);
   • void terminate();
2. Created shell.c and let shell handle user's input.
3. Added the following 0x21 interrupts
   • ax = 3: Read file
   • ax = 4: Execute program
   • ax = 5: Terminate, which reloads shell

To verify, first build the executables. After you run make run, you should see the box. Now do the following:

• Input xxx and it should tell you that you entered a bad command
• Input type with no arguments and it should print an empty string
• Input type messag and it should print the contents in message.txt
• Input execute tstpr2 and it should execute the tstpr2
• Input execute tstprg and it should execute the tstprg and never exit

Milestone 4

Here's what we did for Milestone 4:

1. Added the following functionality in kernel.c:
   • void writeFile(char* name, char* buffer, int numberOfSectors);
   • void deleteFile(char* name);
2. Added the following 0x21 interrupts
   • ax = 6: Write to sector
   • ax = 7: Delete file
   • ax = 8: Write file
3. Added functions in shell.c.

To verify the functions in shell.c, first build the executables according to the "Usage" section. After you run make run, you should see the box. Now do the following:

1. Input copy messag m2, and then input dir, you should see the file 'm2' at the end of the list.
2. Input type m2 and you should see the contents of file messag and they should be the same.
3. Input create test, you should now see a prompt > . Input the following:

   > 123
   > 456
   > 7
   >
   

   Now, if you input dir, you should see a file named test at the end of the list. If you input type test, you should see the contents of it which is what you entered.
4. Input copy shell s, and input execute s and you should be in another shell program. Now input dir, you should see a file named s that has the same number of sectors as shell has.

Milestone 5

Added multiprocessing functionality to the current OS. We also implemented Process Blocking and Management. We also added special features like quit, clear, ps, help, cat, rm and print size of dir.

Troubleshooting

1. Check if buffer size is appropriate
2. Check if index is off by 1, or index never increments
3. Check if floppya.img is changed