Sega Genesis Dev Kit (SGDK)

SGDK only sub forum

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cero
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Re: Sega Genesis Dev Kit (SGDK)

Post by cero » Sat May 28, 2016 11:52 am

I believe the compiler can't do that because of the () parenthesis - the divide was outside of them.

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Re: Sega Genesis Dev Kit (SGDK)

Post by djcouchycouch » Sun May 29, 2016 10:08 pm

For the makefile, moving the mkdir calls from the .c and .s compilation to a pre-build step would be a good idea. On my projects, I kept adding more and more directories to those sections and never noticed the compilation speed gradually slowing down. It would attempt to recreate the same set of folders every time it tried to compile a file. Moving the mkdir calls to a pre-build step cut my compilation time by more than half.

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cero
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Re: Sega Genesis Dev Kit (SGDK)

Post by cero » Mon May 30, 2016 9:41 am

I wondered what mkdir calls, there aren't any in the gendev skeleton makefile, but seems there are in "makefile.gen" shipped in sgdk.

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Re: Sega Genesis Dev Kit (SGDK)

Post by Stef » Mon May 30, 2016 10:03 am

Never realized it was so costly. I just pushed the new makefile to do that in pre-build process :)

dub
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Re: Sega Genesis Dev Kit (SGDK)

Post by dub » Thu Jun 02, 2016 9:28 am

Hi,
I switched my project on the new version of sgdk and I have a problem with the fading (in and out). It works well on emulated but not on the real hardware. I have glitch on screen (bad palette transition). And I have not this problem with the old sgdk with the same code.

I add this code to the sample "sprite".

Code: Select all

// START button state changed
    if (changed & BUTTON_START)
    {
	
		u16 palette[64];
		u8 i;
		
		for (i=0; i<64; i++)
			memcpy(&palette[i], palette_black, 1 * 2);

	
		VDP_fadeOut(0, (4 * 16) - 1, 400, FALSE);
		VDP_waitFadeCompletion(); // wait til fade has completed
		
		// prepare palettes
    memcpy(&palette[0], bgb_image.palette->data, 16 * 2);
    memcpy(&palette[16], bga_image.palette->data, 16 * 2);
    memcpy(&palette[32], sonic_sprite.palette->data, 16 * 2);
    memcpy(&palette[48], enemies_sprite.palette->data, 16 * 2);
	

    // fade in
    VDP_fadeIn(0, (4 * 16) - 1, palette, 400, FALSE);
	
		VDP_waitFadeCompletion(); // wait til fade has completed
    }
I put the source code and ROM for testing.
https://dl.dropboxusercontent.com/u/27435968/fading.zip

Moon-Watcher
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Re: Sega Genesis Dev Kit (SGDK)

Post by Moon-Watcher » Thu Jun 02, 2016 11:06 am

The fade is sync-ed, do you need to call VDP_waitFadeCompletion()?

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Re: Sega Genesis Dev Kit (SGDK)

Post by dub » Thu Jun 02, 2016 11:36 am

yes
you're right. I don't need it but it's because I use it later with a not sync fading.

But I try the two options and I've the same problem.

cero
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Re: Sega Genesis Dev Kit (SGDK)

Post by cero » Thu Jun 02, 2016 11:42 am

Are you sure you're using the latest? It has the "xgm hang during fade" issue, which is fixed in the current sgdk.

dub
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Re: Sega Genesis Dev Kit (SGDK)

Post by dub » Thu Jun 02, 2016 1:04 pm

Yes the very last. I download it this morning and compil the Library.

It's weird.

I test with this line of code only present in the sgdk 1.2 : VDP_setTextPlan(PLAN_WINDOW);
So I think, I have the last version.

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Re: Sega Genesis Dev Kit (SGDK)

Post by Moon-Watcher » Thu Jun 02, 2016 2:26 pm

dub wrote:if (changed & BUTTON_START)
So it's that code

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Re: Sega Genesis Dev Kit (SGDK)

Post by dub » Thu Jun 02, 2016 2:43 pm

Yes, thanks so much.

I put my code outside this function and it works. :mr green:

Code: Select all


void doingFade()
{
	if (fadechange == 1)
	{
		fadechange = 0;
		..
		do fade
		..
	}
}

// START button state changed
    if (state & BUTTON_START)
    {
   
      fadechange = 1;
    }

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Stef
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Re: Sega Genesis Dev Kit (SGDK)

Post by Stef » Thu Jun 02, 2016 9:32 pm

You were doing a synched fading process in the JOY event callback ? that can be a problem indeed as it locks all interruptions (at least you have to know it), still i need to check why it does not work correctly on real hardware.

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Re: Sega Genesis Dev Kit (SGDK)

Post by dub » Fri Jun 03, 2016 2:11 pm

I have to test all my functions. Maybe just a little thing.
But I need to check every time on real hardware. It's so long :mrgreen:

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Re: Sega Genesis Dev Kit (SGDK)

Post by dub » Sun Jun 19, 2016 2:13 pm

I test again and this time directly from the sample sprite whitout changing anything and I always have the same glitch when fading in the top of the screen.

If I increase the value of frame of duration fading, it's more visible. I'll try too with async value (false/true)
VDP_fadeIn(0, (4 * 16) - 1, palette, 200, FALSE);
VDP_fadeIn(0, (4 * 16) - 1, palette, 200, TRUE);

May it be my megadrive with my everdrive ?

Image

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Stef
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Re: Sega Genesis Dev Kit (SGDK)

Post by Stef » Sun Jun 19, 2016 10:15 pm

I need to check that but it looks the palette is transferred during active period and so you have those infamous CRAM dot bug (printed in image when CRAM is wrote). Probably a timing issue in SGDK (CRAM should be wrote during blanking only for that reason).

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