GP2X Minimal Library Sdk V0.9 Out

[rlyeh]

grab it from http://www.retrodev.info

last changes:

  0.9: initial FIFO message system for dual cpu cores.
       initial 48 Mb support.
       initial quadruple buffering in 8bbp mode.

  0.8: initial dual cores cpu support.
       added very basic blit functions by popular demand;-)
       added hsync & vsync waiting code (thanks Reesy)
       bugfixed a stupid typo in 8bpp mode (thanks Franxis for the bug report)

Feel free to submit any bug you find.

PS: I should really start to write tutorials & documentation. Any volunteer to help me in the wiki page to share efforts?

 

[slygamer]

Nice. Thank you very much. The dual core functionality should come in very handy once I work it all out.

I found a compiler error immediately.

.\src\minilib\minimal.c(213): error: conflicting types for 'gp2x_dualcore_launch_program'
.\src\minilib\/minimal.h(89): error: previous declaration of 'gp2x_dualcore_launch_program' was here

The size parameter is declared as int in the header and unsigned long in the source. GCC barfs on that. I'm guessing they should both be unsigned long. After fixing that, it all compiled fine.

 

[rlyeh]

Nice. Thank you very much. The dual core functionality should come in very handy once I work it all out.

I found a compiler error immediately.

.\src\minilib\minimal.c(213): error: conflicting types for 'gp2x_dualcore_launch_program'
.\src\minilib\/minimal.h(89): error: previous declaration of 'gp2x_dualcore_launch_program' was here

The size parameter is declared as int in the header and unsigned long in the source. GCC barfs on that. I'm guessing they should both be unsigned long. After fixing that, it all compiled fine.

​

yep, that's it... declare both as unsigned long.
minor bug

 

[skeezix]

Thanks for saving a lo of us the footwork; I'd planned to do the same thing pretty much, so many thanks

/me waits for 2x..

jeff

 

[Julius]

/me waits for 2x..

​

/me waits for you to get your 2x -- Descent powar h34r:

Nice work, Ryleh!

 

[Dryer Lint]

BTW, would it be possible to change the clockspeeds of the CPUs right now? Or is it not supported by the firmware?

Because IMO one of the most important things for the future is to have programs use the lowest CPU speed they need for saving the battery power.

Note: I'm not trying to nag or whine, I just want to know if it's possible, impossible, or simply unknown. ;-)

 

[xafier]

it's possible I think, but under linux it might behave a little strange or even crash... although the chips are meant for 266mhz so perhaps not...

but I know its definitly possible under HH

 

[jlebrech]

So this dual FIFO, does it play ur game in one CPU and the library on the other?

 

[slygamer]

It allows the programmer to hand off some processing to the second CPU. Note that this is not a magic bullet that will make everything work twice as fast.

 

[rlyeh]

v0.A is out

 

[wild_eyed]

for average joe here, what do i do with this? should i install it on my machine?

 

[slygamer]

You extract it somewhere on your PC that can be found by your compiler. You then use the functions provided by the Minimal Lib to make the GP2X do stuff.

Rlyeh, one bug (four times) and two improvements I think could be made.

1. gp2x_blitter_rect15() and gp2x_blitter_rect8() do not blit correctly.

  while(y--)
  {
    x=r->w;
    while(x--)
      *offset++=*data++;
    offset+=320-x;  // x is not what you expect here
  }

When going to the next line, it adds 320 - x to the offset. But x is always -1 from the previous while loop. This should read

    offset+=320-r->w;

in all four cases where this occurs (twice in each blit function).

2. gp2x_video_wait_vsync() and gp2x_video_wait_hsync() require gp2x_memregs to be declared. minimal.h should declare gp2x_memregs as an extern.

3. gp2x_rect could put data15 and data8 into a union since both will not be used at the same time.

 

[FredrikH]

i don't think anyone will mind me posting this here

well i have used this lib and done some additions to it to put it simply i have added d3d if you compile it with vc.net for windows without any code change from the gp2x version
uses vc express for the gp build but i guess you could put both builds in there just havn't tested that yet.

// todo:
sound
8bit mode
the dualcore part

i hope this eliminates some debugging problems

D3DGP2XCross.rar

 

[RiX0R]

v0.A is out

​

Ahahaha. Geeky and priceless :lol:.

 

[codesmith]

i don't think anyone will mind me posting this here

well i have used this lib and done some additions to it to put it simply i have added d3d if you compile it with vc.net for windows without any code change from the gp2x version
uses vc express for the gp build but i guess you could put both builds in there just havn't tested that yet.

// todo:
sound
8bit mode
the dualcore part

i hope this eliminates some debugging problems

D3DGP2XCross.rar

​

THANK YOU!!! that's going to make debugging so much easier (I've gotten spoilt with visual studio's awesome debugger )

 

[icurafu]

i don't think anyone will mind me posting this here

well i have used this lib and done some additions to it to put it simply i have added d3d if you compile it with vc.net for windows without any code change from the gp2x version
uses vc express for the gp build but i guess you could put both builds in there just havn't tested that yet.

// todo:
sound
8bit mode
the dualcore part

i hope this eliminates some debugging problems

D3DGP2XCross.rar

​

What exactly does it mean by D3D? My mind says Direct3D. But, i don't think that is likely.

 

[slygamer]

I think it will be Direct3D. It allows you to compile the same source for Windows and debug it on your local PC.

FredrikH, I cannot download that RAR file since Firefox 1.5 thinks it is a RealAudio file. Is it possible to post a ZIP file?

 

[FredrikH]

yes its direct3d nothing more than locking the backbuffer though

added joystick support (only tested with an psx controller)
and early 8bit mode havn't figgured out how the palette works yet
also removed the need for the pitch variable all you need to do now is the normal *320
i think thats all

D3DGP2XCross0.2.zip

[edit] fixed the url + removed the intellisense files

 

[slygamer]

D3DGP2XCross0.2.zip

​

The link text says zip. The URL says rar.

To make the zip file smaller, you can remove the ncb files. They are auto-generated by Visual Studio, along with the .user and .suo files. The .old files could also be removed.

 

[rlyeh]

Some news... SDK 0.B is almost done

I think this is a major update

Btw, got gamma correction to work... and 4 YUV regions to work, and mirroring to work, and scaling to work, and 5 RGB regions to work, and colorkey to work, and alpha blending to work... damn I'm happy