Gameboy Development Forum

Great start! I look forward to following your progress and playing!

I need a good way to clear just the text off the screen instead of all the background tiles.

If there was a way to put the "cursor" back at 0,0 instead of where it left off printing text, then perhaps the background wouldn't have to blink. Is there a way to do that?
EDIT: I did find a way to solve the blinking problem. What I had to do is set each character individually, like so:

  gotoxy(1, 16); setchar('I');

and then when I was done showing it, clear each character, like so:

  gotoxy(1, 16); setchar(' ');

There should be an easier way to do this, but darned if I can figure it out.

Last edited by chris (2016-12-11 05:44:26)

Frank the Fruit Fly proved to be too much of an ambitious game to be my first project. So I'm going for something simpler. It's like the 2600 game Fast Food, but in reverse, so you dodge the oranges instead of trying to eat them. The game is called Oranges. All I have so far is the title screen. I need to compose music and then figure out what the notes are and then program that in. Link is in my signature.

I'm getting a little better at this. This is what I have right now:

Five oranges all at different speeds. The game ends if an orange hits you. There's not much to do except dodge oranges. I'm looking for feedback and suggestions on what to do. Link to the latest rom is in my signature.

npzman wrote:

Can you help me make a start screen with the game logo showing ?

Try this tutorial:

https://retrospektakel.wordpress.com/ga … g-english/

I would like a nice Ding! sound instead of the screechy sound I have in there now, but I need help. I read this page:
http://gbdev.gg8.se/wiki/articles/Gameb … d_hardware, but I don't understand any of it. The sound I have in there now is this:

NR41_REG = 0x40, NR42_REG = 0xf0, NR43_REG = 555, NR44_REG = 0xc0

I don't understand this, either, but it gave me at least a sound. Is there an easy ding sound I can use somewhere or can someone write me an easy one?

Last edited by chris (2017-02-17 17:56:58)

If I remember tonight, I send you over some functions I've written for playing some simple sound effects, you're settings register values for the Noise channel (Channel 4) there. You'll get a nicer "ding" using either channel 1 or 2.

Off the top of my head, try using the following settings - with comments

NR11_REG = 0x7f; // SQUARE WAVE DUTY
NR12_REG = 0x7f; // VOLUME 0 = quietest, 255 = loudest
NR13_REG = 0xFF; // LOWER BITS OF SOUND FREQ
NR14_REG = 0x86; // LARGER SOUND FREQ - MINIMUM VALUE OF 128, HIGHER = HIGHER

Have you tried changing the values over time to fade out or modulate the ding, etc? It might help out.

Well, I finally figured out what the problem was. As it turns out, putting wait_vbl_done made it work correctly, but made everything slow way down, so I sped it up. Before, I got the scratchy ding sound only when the guy was down at the bottom half of the screen. Which makes no sense to me. But I suddenly had the bright idea of trying wait_vbl_done since it wasn't in there before.