Certainly! Let's start with a simple example. Below is a BASIC program that creates a bouncing ball on the Commodore 64 screen. This program will demonstrate basic graphics and movement mechanics.
```basic
10 REM BOUNCING BALL DEMO
20 REM INITIALIZE SCREEN AND VARIABLES
30 POKE 53280,0: POKE 53281,0: REM SET BORDER AND BACKGROUND COLOR TO BLACK
40 PRINT CHR$(147): REM CLEAR SCREEN
50 X = 10: Y = 10: REM INITIAL POSITION OF THE BALL
60 DX = 1: DY = 1: REM INITIAL DIRECTION OF THE BALL
70 REM MAIN LOOP
80 POKE 1024 + Y * 40 + X, 81: REM DRAW THE BALL
90 FOR DELAY = 1 TO 50: NEXT DELAY: REM ADD A SMALL DELAY
100 POKE 1024 + Y * 40 + X, 32: REM ERASE THE BALL
110 X = X + DX: Y = Y + DY: REM MOVE THE BALL
120 IF X = 0 OR X = 39 THEN DX = -DX: REM BOUNCE OFF LEFT/RIGHT WALLS
130 IF Y = 0 OR Y = 24 THEN DY = -DY: REM BOUNCE OFF TOP/BOTTOM WALLS
140 GOTO 80: REM LOOP BACK TO DRAW THE BALL AGAIN
```
### Explanation:
- **Line 10-20**: Comments and initialization of screen and variables.
- **Line 30**: Sets the border and background color to black.
- **Line 40**: Clears the screen.
- **Line 50**: Initializes the ball's starting position.
- **Line 60**: Sets the initial direction of the ball.
- **Line 80**: Draws the ball at the current position.
- **Line 90**: Adds a small delay to control the speed of the ball.
- **Line 100**: Erases the ball from the previous position.
- **Line 110**: Updates the ball's position.
- **Line 120-130**: Checks for collisions with the screen edges and reverses the direction if necessary.
- **Line 140**: Loops back to redraw the ball.
### Running the Code:
1. **On a Real C64**: Type the code into the C64 using the BASIC editor and press `RUN`.
2. **On an Emulator**: Load the emulator, open a new file, type the code, and press `RUN`.
This simple program demonstrates basic graphics and movement mechanics on the C64. For more advanced techniques, such as using assembly language for faster execution or more complex graphics, feel free to ask!
Base44
Mini tools
AI-powered Commodore 64 code generator for retro enthusiasts.OpenCertainly! Let's start with a simple example. Below is a BASIC program that creates a bouncing ball on the Commodore 64 screen. This program will demonstrate basic graphics and movement mechanics. ```basic 10 REM BOUNCING BALL DEMO 20 REM INITIALIZE SCREEN AND VARIABLES 30 POKE 53280,0: POKE 53281,0: REM SET BORDER AND BACKGROUND COLOR TO BLACK 40 PRINT CHR$(147): REM CLEAR SCREEN 50 X = 10: Y = 10: REM INITIAL POSITION OF THE BALL 60 DX = 1: DY = 1: REM INITIAL DIRECTION OF THE BALL 70 REM MAIN LOOP 80 POKE 1024 + Y * 40 + X, 81: REM DRAW THE BALL 90 FOR DELAY = 1 TO 50: NEXT DELAY: REM ADD A SMALL DELAY 100 POKE 1024 + Y * 40 + X, 32: REM ERASE THE BALL 110 X = X + DX: Y = Y + DY: REM MOVE THE BALL 120 IF X = 0 OR X = 39 THEN DX = -DX: REM BOUNCE OFF LEFT/RIGHT WALLS 130 IF Y = 0 OR Y = 24 THEN DY = -DY: REM BOUNCE OFF TOP/BOTTOM WALLS 140 GOTO 80: REM LOOP BACK TO DRAW THE BALL AGAIN ``` ### Explanation: - **Line 10-20**: Comments and initialization of screen and variables. - **Line 30**: Sets the border and background color to black. - **Line 40**: Clears the screen. - **Line 50**: Initializes the ball's starting position. - **Line 60**: Sets the initial direction of the ball. - **Line 80**: Draws the ball at the current position. - **Line 90**: Adds a small delay to control the speed of the ball. - **Line 100**: Erases the ball from the previous position. - **Line 110**: Updates the ball's position. - **Line 120-130**: Checks for collisions with the screen edges and reverses the direction if necessary. - **Line 140**: Loops back to redraw the ball. ### Running the Code: 1. **On a Real C64**: Type the code into the C64 using the BASIC editor and press `RUN`. 2. **On an Emulator**: Load the emulator, open a new file, type the code, and press `RUN`. This simple program demonstrates basic graphics and movement mechanics on the C64. For more advanced techniques, such as using assembly language for faster execution or more complex graphics, feel free to ask!
