blink65

Write Arduino-style sketches with cc65 for VIC-20, PET, and Commodore 64.

Arduino-style API

This example summarizes the Arduino-style API implemented so far:

void setup(void)
{
    pinMode(LED_BUILTIN, OUTPUT);
    pinMode(PIN_L, OUTPUT);
}

void loop(void)
{
    digitalWrite(LED_BUILTIN, HIGH);
    tone(PIN_L, 440);
    analogWrite(PIN_M, 85);
    delay(1000);

    digitalWrite(LED_BUILTIN, LOW);
    noTone(PIN_L);
    analogWrite(PIN_M, 170);
    delay(1000);
}

Commodore User Port

PIN_1	PIN_2	PIN_3	PIN_4	PIN_5	PIN_6	PIN_7	PIN_8	PIN_9	PIN_10	PIN_11	PIN_12
GND	(1)	(1)	(1)	(1)	(1)	(1)	(1)	(1)	(1)	(1)	GND
GND	(2)	I/O 0	I/O 1	I/O 2	I/O 3	I/O 4	I/O 5	I/O 6	I/O 7	(2)	GND
PIN_A	PIN_B	PIN_C	PIN_D	PIN_E	PIN_F	PIN_H	PIN_J	PIN_K	PIN_L	PIN_M	PIN_N

(1) Pins of the upper row differ significantly between systems. Some of them can be used as additional input or output lines.

(2) Pins B and M of the lower row are available on all systems, but with different constraints.

I/O pins from C to L are connected to one port of a VIA or CIA chip on all systems and can be independently programmed as input or output.

Acknowledgements

This project is inspired by the Arduino programming model and API. The setup() / loop() structure and function naming follow the conventions popularized by the Arduino platform.

Arduino is an open-source project developed by the Arduino team: https://www.arduino.cc/

This project is not affiliated with or endorsed by Arduino.