From jacobson@cns.uni.edu Tue Jan 25 17:35:30 2011
Date: Tue, 25 Jan 2011 17:35:30 -0600 (CST)
From: Mark Jacobson <jacobson@cns.uni.edu>
To: 810-023-01-spring@uni.edu
Subject: TIC Tiny Imaginary Computer group exercise - Fetch/Execute cycle...

Hi 023 students,

     Reminder:  StudioIT 1 ITT 134 class on Thursday!

     Here is the solution to this morning's group exercise of tracing
the execution of the TIC program.

     The final output was just two numbers:

                104
                208

      http://www.cs.uni.edu/~jacobson/23/spr11/TICgroupExercise.pdf

      Note that the last number left
            in the PC (Program Counter,
                          aka IAR or Instruction Address Register)
                   would be 19, address 19.

      The fetch/execute cycle (called machine cycle on today's handout).

        1. Fetch the instruction located at memory address PC
        2. Increment the PC (add 1 to the PC)
        3. Exeecute the fetched instruction

      Note that the ACC ACCumulator register had 4 different values
         during the execution of the TIC program:

                          15, then 52, then 104, then 208

      Note that 104 is converted to binary as follows:

          104
          -64            64  32  16  8  4  2  1
          ---             1   1   0  1  0  0  0
           40
          -32             104  =  1101000
          ---                10          2
            8
           -8
          ---
            0

     Since 64 + 32 + 8 = 104, what would 2 * 64 + 2 * 32 + 2 * 8 = ?

                                          128  +   64    +  16 = 208
                                           1 1 0 1 0 0 0 0
                                           - - - - - - - -


     Notice that 1101000  = 104
             and 11010000 = 208

     When you multiply a binary number by 2, you just add a 0 to the
     binary number and shift all the other digits to the left.

     So its the same concept as when you multiply 136 by 10.

     Add a 0 and get 1360 or 1,360 and its as easy as that to multiply
                                       by ten in base ten.

     Notice that  1101000  = 104
             and 11010000  = 208

     Same concept for multiply by two in base two.

     http://www.cs.uni.edu/~jacobson/23/spr11/TICgroupExercise.pdf

     **** Reminder:  StudioIT 1 ITT 134 class on Thursday! ****
                     2nd floor computer lab...

     Mark

----------------------------------------------------------------------------
On Thu, 20 Jan 2011, Mark Jacobson wrote:

>
> Hi 023 students,
>
>    In case you need the syllabus and did not get a copy:
>
>    http://www.cs.uni.edu/~jacobson/AE/spr11/syllabus023Spring2011.pdf
>
>    To review what we did today with Flash and audio:
>
>       1. Watch this video tutorial and take some notes.
>
>          http://www.cs.uni.edu/~jacobson/23/fla/s/vid/FlashSounds.html
>
>       2. Play with the following example.  It has 3 different buttons,
>          and animation is included with the Audio sound.
>
>    http://www.cs.uni.edu/~jacobson/23/fla/s/vid/022010/soundLesson.html
>
>             Gotta make my URLs be shorter
>                        instead of loooooooooooooooooooonger!
>
>       3. Look over any of the following pages links that you wish to.
>
>          It is SPRING 2010 page and it is NOT an assignment for
>          this semester.                   ---
>
>          It was due on February 28th, 2010 about 11 months ago!  :-)
>
>          http://www.cs.uni.edu/~jacobson/23/fla/sound/soundAssign.html
>
>       We will do a portion of the Tuesday class about TIC, the
>       Tiny Imaginary Computer and the other portion will be about
>       Flash and buttons and audio concepts to help prepare for
>       next Thursday's StudioIT 1 lab class.
>
>       We are back in the classroom on Tuesday.
>
>   Mark
>
>