Gameboy Development Forum
Discussion about software development for the old-school Gameboys, ranging from the "Gray brick" to Gameboy Color
(Launched in 2008)
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#1 2017-12-16 15:00:03
Putting text on screen and colors
I want the background to be black. But whenever I put text on the screen, no matter what way, the background turns to white. How do I stop it from doing this?
My avatar is from Nintendo Power. I miss those days, so I decided to bring them back.
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#3 2017-12-16 17:17:19
- Hell_666
- Member
- Registered: 2017-12-13
- Posts: 18
Re: Putting text on screen and colors
If your issue can happen to a lot of people I think you should post how you resolved it, it could help someone with the problem and searching for a solution 
Last edited by Hell_666 (2017-12-16 17:17:27)
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#4 2017-12-17 09:33:32
Re: Putting text on screen and colors
from my new game I'm working on:
Code:
void get_font()
{
set_bkg_data(0x30, 0x0A, number_tile_data);
set_bkg_data(0x40, 0x0A, alphabet_tile_data);
set_bkg_data(0x4A, 0x09, alphabet_tile_data2);
set_bkg_data(0x53, 0x09, alphabet_tile_data3);
}
void main()
{
unsigned char randomthing = *(ptr_div_reg);
BGP_REG = 0x27U;
printf(" ");
get_font();
gotoxy(8,15);
printf("2018"); // should show up as white text on black backgroundI made outer space white and changed the white to black with the BGP_REG command. Earlier it still was displaying black text on white even though I was using the BGP_REG command. So I added a blank printf command before I got the font loaded and that seemed to please it.
My avatar is from Nintendo Power. I miss those days, so I decided to bring them back.
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#6 2018-07-30 06:40:06
- gbjosh
- Member
- From: KY
- Registered: 2016-06-15
- Posts: 51
Re: Putting text on screen and colors
26F wrote:
What does BGP_REG = 0x27U; actually do?
BGP_REG is BG palette data.
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#7 2018-07-30 22:42:07
Re: Putting text on screen and colors
Reasons not to use GBDK...
Also, `printf` should never be used on GB.
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