1. Access to memory sticks from VBOX Ubuntu

   Here are the video clips of how to access a memory stick from ubuntu and run the simulator. These are primitive - I did them with my still camera.

   clip 1
   clip 2
   clip 3

   These assume you have installed VBox, Ubuntu, and dosbox. remember, you can run the simulator on any campus machine. This is just if you want to do it yourself AND you have a 64 bit machine AND you have 64 bit windows. If you have 32 bit windows, you can run the simulator as-is in a command prompt window.

2. Installing Guest Additions

3. Shared Folders

   Shared Folders Part 1
   Shared Folders Part 2

   Note 1: USB memory devices should be shared as folders. Before Ubuntu starts, plug your memory stick in and wait for Windows to assign it a drive letter. Use this drive letter in place of the C:\ in the above videos.

   Note 2: USB memory and disk folders mounted in Ubuntu are automatically dismounted by Ubuntu when you shut Ubuntu down. These, however, are still mounted by Windows and should then be dismounted from Windows in the usual way. If you need to dismount a mounted USB folder device before you shut Ubuntu down, you will need, as root, to execute the umount command shown in the second video. Once it is unmounted from Ubuntu, it can be dismounted from Windows in the usual way. This is important to prevent data loss.

4. Shared USB devices

   USB devices Part 1
   USB devices Part 2

5. Running 041 Assignments in Ubuntu dosbox

   041 Assignments 1
   041 Assignments 2

6. Running 041 Assignments in Windows Command Prompt

   041 Assignments 1
   041 Assignments 2
   041 Assignments 3

7. Lecture Fri Sept 11, 2009 Sept 11, 2009 (sound quality weak)

1. Write an assembly language program that will sum the first 5 integers (beginning at 1) and print the total. Use the following code as an example.

            PRINT NOGEN
   BEGIN    BEGIN
            REGS
            L     R3,FIVE
            A     R3,THREE
            CVD   R3,DBL
            ED    RESULT,DBL+6
            WTO   RESULT
            RETURN
            LTORG
   FIVE     DC    F'5'
   THREE    DC    F'3'
   RESULT   DC    X'40202120'
   DBL      DC    D'0'
            END   BEGIN
   

   The code above loads 5 (in binary) into R3 then adds 3 to it then prints the result. The constants 3 and 5 are at the labels FIVE and THREE. The CVD instruction converts the binary in R3 to an intermediate forme known as PACKED DECIMAL. The ED instruction converts the PACKED DECIMAL to printable characters. The WTO macro writes the result. The initial value in the string RESULT is a pattern which tells the ED instruction how to do the conversion. The LTORG tells the assmebler to place literals at this point.

   Due: Friday Sept 11

2. Below is a file of Hex. The first counter is the location counter and the second is the machine language code at the location.

   Using the Green Card JPG scans link to the course web page (near the bottom), convert the Hex machine language code to assembly language using the fully explicit notation.

   For example, the first line is:

   000058 90ECD00C

   90 is the op code for an STM instruction. An STM instruction is an RS instruction with the explicit format:

   STM R1,R3,D2(B2)

   The machine language layout for RS format instructions is given at the bottom of Green Card panel 2.

   Thus, the above code becomes:

   000058 STM R14,R12,00C(R13)

   Where E becomes R14, C becomes R12, D is R13. You can leave the displacement in Hex (not legal really but not a real problem).

   Due Mon Sept 28

   LOC CODE 000058 90ECD00C 00005C 50D0F014 000060 18ED 000062 41D0F010 000066 50D0E008 00006A 92D3D07D 00006E D202D07AD07D 000074 95D5D07A 000078 4770D070 00007C 92D4D07A 000080 58DD0004 000084 98ECD00C 000088 07FE

3. Write the truth table for Problem 11 on page 227. What does the circuit do? Due Mon Oct 26.

4. Do problems 10, 11 and 12 from page 423. Due: Mon Nov 16.

On-Line IBM S/390 Principles of Operation (free)

PC Assembly Language (free)

Create a directory named pc370. Copy this zip file to that directory and unzip