The Dot Click Computer

Draw dots, click your speaker, make something cool.

Are you up for a challenge?

Dot Click is a very simplistic virtual computer operated by a single function called 705,600 times per second.

uint8_t dot_click(uint16_t dot, uint8_t input)
{
    uint8_t output = ... your code here ...
    return output;
}

The dot parameter

The Dot Click computer processes 11,760 dot-click bytes 60 times per second.

9,216 of those dots are visible on the display. The remaining 2,544 dots are not visible, but audio is still processed for these output values.

The input parameter

Use this to read the user's controller and cursor. Each bit is set to 1 when the corresponding button is pressed. Bit 7 is set to 1 when the cursor is on the current dot.

• bit 0 : press up
• bit 1 : press down
• bit 2 : press left
• bit 3 : press right
• bit 4 : press A (Z, space, enter)
• bit 5 : press B (X, esc)
• bit 6 : click the cursor
• bit 7 : cursor is here

The dot_click return value

• bits 0-3 speaker volume

  • Use these bits to make sounds. Try this: output=(dot>>9)&1)<<3;

• bits 4-7 dot color

  • Use these bits to color a dot on the screen. Try this: output=(dot<<1)&0xf0;