1 Reply by JS7777

(3 replies, posted in Nintendo Handhelds)

I didn't manage to get it to work on a GBA.

However on a Gameboy pocket I had to start with the custom logo rom instead of the nintendo logo rom and the delay is 500ms.

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2 Reply by JS7777

(3 replies, posted in Nintendo Handhelds)

Thanks for your reply.

I'm using a purple Gameboy Color CGB-001.

That's strange indeed.

I'm using this simple code I wrote on Arduino and it works.

int ADR1 = 3; // A15 or A16
int ADR2 = 4; // A16 or A17


void setup() {

pinMode(ADR1, OUTPUT); // Pin 11 as Output
  pinMode(ADR2, OUTPUT); // Pin 12 as Output
  
  

  
digitalWrite(ADR1, HIGH);
 digitalWrite(ADR2, LOW);

delay(99);

digitalWrite(ADR1, LOW);
 digitalWrite(ADR2, LOW);

 
}

  void loop() {



  }

I'm gonna try the way of GB Dev FAQs as you stated to see if it works on a GBA.

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3 Topic by JS7777

(3 replies, posted in Nintendo Handhelds)

Hello there,


I actually managed to boot a game with a custom boot logo on a Gameboy, since it reads this part twice, once for VRAM and once to check that it's correct.

So I've used an attiny85 to select the rom with the custom logo then a delay of 100ms then the rom to boot up, it works perfectly on a gameboy and gameboy color. (I've used arduino to program the chip)

However I couldn't find how to do it for a Gameboy Advance, the delay isn't the same (around 400ms) hence I still can't boot the game with the full custom logo.

I was wondering if it's possible on a GBA.


Regards

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4 Reply by JS7777

(45 replies, posted in Nintendo Handhelds)

Hello everyone !

Sorry for bumping this but if some are interested for a flappy bird gameboy cartridge please go to this folowing link and fill the form.
https://electroniq.fr/flappybird

I will produce them if some people are interested. (It will take some weeks)

Around 15€ (without shipping).


Cheers

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