Month

Brief Information about a future CSIG Meeting

• Two Topics
1. A Bounce-Bar Menu system
2. Code from the November 1, 1996 main meeting:  A CPU Emulator.

1. This program creates a bounce-bar menu.

/*--------------------------------------------------------------------------*
 * Program:         MENUDEMO.CPP
 * Author:          Michael P. Redlich
 * Date/Time:       8-11-96  5:17:42 pm
 * Description:     This program demonstrates bbMenu.
 *--------------------------------------------------------------------------*/

class bbMenu
  {
    int x;
    int y;
    int w;
    int j;
    struct entryType
      {
        int x;
        int y;
        int choiceNo;
        const char *strbuf;
        entryType *prev;
        entryType *next;
        int getChoice(void) const;
        void setOption(int) const;
        entryType(entryType *,entryType *,int,int,int,const char *);
      };
    entryType *firstEntry;
    entryType *curEntry;
    int getKey(void) const;
    void setMenu(void);

    public:
      bbMenu(int,int,int);
      ~bbMenu(void);
      int getChoice(void);
      void addPrompt(const char *);
  };

.....

void main(void)
  {
    setMainColor();
    clrscr();
    _setcursortype(_NOCURSOR);
    mainMenu();
  }

void setMainColor(void)
  {
    textbackground(1);
    textcolor(15);
  }

...............

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2. Code from the November 1, 1996 main meeting

The C++ CPU Emulator Program

• An IBM compatible software program which will "run" the "Factorial 6" program code.
• Based on the Instruction Pointer (IP), the emulator steps through each line of the program, decodes the instruction and executes it.

Complete Instruction Set

• ADD reg, reg ..........; Add 2 registers
• MUL reg, reg ..........; Multiply
• MOV reg, reg ..........; Move
• MOV reg, immediate ....; Assign value
• DEC reg ...............; Decrement by 1
• JZ step ...............; Jump if zero
• JNZ step ..............; Jump if not zero
• PRT reg ...............; Mystery Print

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SOURCE CODE

Source Code Files