Standalone player of Monkey Island PC-Speaker music

Detailed blog post about this, at: https://www.thanassis.space/monkeyisland.html

• I modified DOSBox to extract the frequency/delay value pairs of the Monkey Island PC-Speaker songs.
• I then managed to squeeze all the music data inside an ATtiny85 (512 bytes of RAM, 8 KB of flash)
• Once I did, I created a small circuit with a speaker, to play the music...
• ...as a gift for my nieces and nephews; whom I will see next week, after being away for so long! (COVID19)

Yes, their uncle is a complete nerd. And he made sure they grew up meeting Guybrush Threepwood :-)

Just read the blog post.

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For those that want to reproduce the circuit: I confess I didn't make a schematic, since the HW part is so simple :-) The only part that matters is the transistor-speaker connection - copying it below from the Arduino forum:

As for the connections, as you can see at the top of the code...

• The transistor's base gets connected to PB0 (via the 1K resistor)
• The LED is connected to PB1 (via a 220 Ohm resistor)
• ...and the pushbutton to PB3.

The pushbutton pin is pulled to GND via a 10K resistor, but pulled up to VCC when the button is pushed.

Also: these assignments are just #defines in the code - feel free to change them if a different placement suits you better.

Here's some ASCII-art of the ATtiny85, to show the pin layout:

                                    +--------+
       (PCINT5/~RESET/ADC0/dW) PB5  | 1    8 | VCC
(PCINT3/XTAL1/CLKI/~OC1B/ADC3) PB3  | 2    7 | PB2 (SCK/USCK/SCL/ADC1/T0/INT0/PCINT2)
 (PCINT4/XTAL2/CLKO/OC1B/ADC2) PB4  | 3    6 | PB1 (MISO/DO/AIN1/OC0B/OC1A/PCINT1)
                               GND  | 4    5 | PB0 (MOSI/DI/SDA/AIN0/OC0A/~OC1A/AREF/PCINT0)
                                    +--------+

Enjoy!

And share pictures if you make one :-)