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TyRaNiD wrote:You need to update newlib as > 3.30 does some weird stuff to stdout/stderr which breaks newlibs file descriptor mapper.

I reinstalled lastest toolchain/newlib/pspsdk.
But same problem exists and if use USE_PSPSDK_LIBC = 1, redirection does work.
So, problem seems newlib.

How can I fix it?

Under CF 3.30, Everything is OK.
But above CF 3.30, stdout redirection of PSPLINK does not work.

My environment is following
- PSPSDK : 2007.11.06
- PSPLINK : lastest version in SVN.

Is it nomal?
If not, What is a problem?

fishdrop wrote:I executed examples in your tutorial.
But patching import table method is not work in CF3.03 above.
Is it ture at CF 3.xx?

Sorry, I solved it.

I executed examples in your tutorial.
But patching import table method is not work in CF3.03 above.
Is it ture at CF 3.xx?

PSPJunkie wrote:PSPLink redirects the stdout and stderr so just use printf() to print text to the pspsh screen.

But it may be not work in slim psp.
How can I do?

Yes, I put sio module to kernel prx and call it.
but following error occurs when execute it.

SCE_KERNEL_ERROR_LIBRARY_NOTFOUND = 0x8002013c

What a problem?

I want to develop 3.03 OE homebrew.
I can't use SioKprintf in homebrew code for 3.03 OE.
So it is very difficult to debugging.
Is it impossible to use of SioKprintf in 3.03 OE homebrew?

The most common sample rates are evenly divisible by 44100 are they not? So for say 22050, you could just let pspaudio play at 44100, and send the same data twice, for 11025, send it four times. Then there's no overhead for those sample rates. Below that, I think is not evenly divisible, but does a...

You could use SDL to do the audio conversion and playing. Of course SDL might slow things down a bit, although not too much, but as you're doing a player and not something of which the sound is secondary--like a game for example, I don't think a small overhead in sound output is a problem. Your own...

I want to develop mp3 player which plays any sampling rate mp3.
But PSP's audio output is fixed at 44.1khz
So, sampling rate convertsion is needed in runtime.
If possible, I want to know how use firmware system call for performace issues.
Anyone knows this?

Good job! But I have a question. In FW 2.71, following message and not working. What is problem and how to solve it? prxtool.exe -x usb271.prx > usb271.xml PRXTool v1.0 : (c) TyRaNiD 2k6 Loading usb271.prx Error: Magic value incorrect (not an ELF?) Error: Couldn't load prx file structures I found a...

Good job!

But I have a question.
In FW 2.71, following message and not working.
What is problem and how to solve it?

prxtool.exe -x usb271.prx > usb271.xml
PRXTool v1.0 : (c) TyRaNiD 2k6
Loading usb271.prx
Error: Magic value incorrect (not an ELF?)
Error: Couldn't load prx file structures

You can't loadexec anything from kernel mode in 2.XX, the function sceKernelLoadExec in LoadExecForKernel doesn't exit anymore, and the function for LoadExecForUser gives the error illegal perm call when called from a vsh or kernel thread. Of course in kernel mode you can patch everything. Looking ...

Correct me if I'm wrong, but I thought homebrew voor 2xx (using Devhook) was only in user mode. nice to hear that I'm not the only one who tries to load 1.50 homebrew in 2.71 firmware (devhook or not, but expecialy for native 2.71 TA-82 users). I'm stucked at the point to emulate the 1.50 firmware ...

tnt wrote:Do you have USE_KERNEL_LIBS in your prx makefile ?
I think it's needed to use the kernel version of sceKernelLoadExec ...

Of cource, I use USE_KERNEL_LIBS=1 in makefile.

I want to write prx code execute homebrew(fw1.50) in emulating mode(fw 2.xx). So, my testing code following.... PSP_MODULE_INFO("ExecuteHB", 0x1000, 1, 1); PSP_MAIN_THREAD_ATTR(0); ......... ercd = sceKernelLoadExec(homebrewpath, NULL); ......... But Error ocurs 0x80020149 which is SCE_KER...