Search found 489 matches

by jean
Wed Aug 19, 2009 8:41 pm
Forum: PSP Development
Topic: Open Keyboard Project
Replies: 299
Views: 270406

Sorry...this has already been covered: while not impossible, it's very unlikely we'll see an out-of-the-box usual USB keyboard work with PSP without expensive adapters....search the forum for more infos.
by jean
Sun Aug 16, 2009 5:14 am
Forum: PSP Development
Topic: Open Keyboard Project
Replies: 299
Views: 270406

I would be happy not to see chatpads with my open and free firmware sold for more than original price plus shipping taxes... I'm not accusing anyone, but seeing such a thing would definitely cause the stop of ANY development on this hack from my side. Hope you'll understand...
by jean
Wed Jun 10, 2009 10:09 pm
Forum: PSP Development
Topic: Direct Audio Input?
Replies: 3
Views: 1650

Well, an audio in connection usually expects a variable voltage ranging from -1v to +1v, while a microphone one expects resistence or capacitance variation. Since (for Ohm's law) V=RI, it is usually safe to connect a line-out to a mic-in through the use of a serie resistor. However, if you want thin...
by jean
Mon May 25, 2009 9:01 pm
Forum: PSP Development
Topic: Open Keyboard Project
Replies: 299
Views: 270406

My chatpad's replacement firmware totally screws things on xbox side, i.e. you won't be able to use chatpad the common way again. So, open keyboard has nothing to do with HID; despite of this, it is trivial to make it work on a PC because it uses true asynchronous serial protocol (e.g. rs232): the o...
by jean
Fri May 08, 2009 5:31 pm
Forum: PSP Development
Topic: Open Keyboard Project
Replies: 299
Views: 270406

The old download i removed from other sites and home of future announces/releases
http://sites.google.com/site/nerdsheadq ... tpadsstuff
by jean
Sat May 02, 2009 7:28 pm
Forum: PSP Development
Topic: Open Keyboard Project
Replies: 299
Views: 270406

baudrate&typing mode = covered a thousand times... sorry but i alway lack time...try reading better this topic AND the comments in O.K. package...
by jean
Tue Apr 28, 2009 6:36 pm
Forum: PSP Development
Topic: HELP! A complete valid pinout for the psp slim remote
Replies: 30
Views: 102370

Just one word:
<<
Price: $40.07
>>
...and you'll end with an expensive serial port (with still a few hundreds of Kb/s transfer rate and a whole world of protocol stacks to be rewritten on PSP side).
by jean
Thu Apr 16, 2009 10:39 pm
Forum: PSP Development
Topic: Low-level interrupt control
Replies: 14
Views: 4319

Well, maybe because its not a completely valid argument :-P It is. This month it is 21 years since my first listing (written on an Olivetti PC128s - a BBC Acorn italian replica). Since then i read many books, but the most i've learned, it's taken from experience. Today, children want all and immedi...
by jean
Thu Apr 16, 2009 10:25 pm
Forum: PSP Development
Topic: DSL [damn small linux]
Replies: 29
Views: 15501

<sarchasm>Yeah..why not? creating an OS from scratch is surely a good idea</sarchasm>. No, seriously: the idea behind requests like this is to exploit pre-exsistent software portability from a platform to another. Sure you'll have to recompile sources, but existent linux software would need small-to...
by jean
Tue Apr 14, 2009 6:16 pm
Forum: PSP Development
Topic: Easy Hooking Example - User & Kernel
Replies: 8
Views: 6452

Very nice for those (like me!) too lazy to dig in sources and do error-and-retry tests a million times. Thanks for sharing.
by jean
Sat Apr 11, 2009 6:54 pm
Forum: PSP Development
Topic: sio port
Replies: 10
Views: 3472

Not enough to make a difference at serial speeds. Exactly, in paricular when you use the usart. To return up to pic power voltage, i must admit that Microchip's products are different from stock to stock and there's some exemplar that i wasn't able to program with my simple programmer, probably due...
by jean
Sat Apr 11, 2009 6:59 am
Forum: PSP Development
Topic: sio port
Replies: 10
Views: 3472

The PIC's UART will anyway not function with the PSP's 2.5v port. The IO ports need 5v to trigger (When UART is activated on the 16f87x IO ports C6 and C7 become Tx and Rx). You'll need to pull up the voltage anyway. If it doesn't work with the UART pins for some reason, there are plenty of softwar...
by jean
Fri Apr 10, 2009 8:55 am
Forum: PSP Development
Topic: blitting an image from an eboot?
Replies: 2
Views: 1590

Somewhere in sdk there's a tool to "compile" an image into an object that can then be linked to main executable: can't remember details because this is definitely not the way i would use images. Anyway, this is not a good idea as a rule of thumb, especially if your images are many/expensiv...
by jean
Fri Apr 10, 2009 8:49 am
Forum: PSP Development
Topic: Open Keyboard Project
Replies: 299
Views: 270406

Well...a lot of time passed since the last time i flashed my keyboard, but i do remember that the chatpad used to flash lights at the connection and during programming...i'm sure you're on the right way. Just a little advice: try to flash the keyboard (without verify), then read back content and com...
by jean
Fri Apr 10, 2009 8:40 am
Forum: PSP Development
Topic: sio port
Replies: 10
Views: 3472

Sorry, dude...don't know if there's a low-level "hidden" way to do that, but surely i can tell you there isn't an easy way to do what you want, and that's because you can't communicate directly with I/O port but you have to dialogue with an USART, so you can do on I/O port what the USART l...
by jean
Mon Apr 06, 2009 6:02 pm
Forum: PSP Development
Topic: How do games draw 3D data to screen?
Replies: 4
Views: 2307

Download pspsdk sources: there are no better documentation. In that package you should even find a txt file with the command codes GU uses to communicate with GE chip.
by jean
Sat Apr 04, 2009 11:49 pm
Forum: PSP Development
Topic: Get sio from remote
Replies: 2
Views: 1737

Having separate groundings for different lines of the same device is a finesse... usually connecting one of the grounds is enough for most applications: try connecting grounds together.
by jean
Sat Mar 28, 2009 9:28 pm
Forum: PSP Development
Topic: Digital audio out
Replies: 8
Views: 2432

Capture the audio in software, prevent it from playing through the output
...Maybe you could simply hook some waveform playing api function...
by jean
Wed Mar 25, 2009 1:59 am
Forum: PSP Development
Topic: Hooking Usermode Functions from inside a Kernel PRX
Replies: 19
Views: 6152

User mode functions don't use syscalls.... Although he could just patch the functions to syscall into his kernel module, instead of hooking it with another user module. Honestly: i never thought this way, that's interesting.... but there could be severe problems in the common case where one has to ...
by jean
Mon Mar 23, 2009 8:05 pm
Forum: PSP Development
Topic: Hooking Usermode Functions from inside a Kernel PRX
Replies: 19
Views: 6152

Syscalls are a way to call kernel stuff from user world. So -if i understood it well- there is no syscall table regarding user functions and hence you cannot patch a user function via syscall table because you won't find an entry for your user function. You must find the function address and substit...
by jean
Sat Mar 14, 2009 12:55 am
Forum: PSP Development
Topic: SceGu vs OpenGl Similarity
Replies: 2
Views: 1641

Codes of the two world are not directly portable, but they work in a very similar manner, so i would definitely raccomend you to learn openGl: it is an enstabilished standard and it will help you understand how the most graphical hardware works, including PSP's GE.
by jean
Sat Mar 14, 2009 12:51 am
Forum: PSP Development
Topic: Limitation of analogic speed
Replies: 5
Views: 2433

You can use a simple follower derived from PID controller: for each axis, ca += &#40;ra - ca&#41;*k; where: ca = computed axis (the one you will use) ra = real axis (the position you readed from hw) k = a constant between 0 and 1 (the lower, the slower) each of the members need to be float o...
by jean
Sat Mar 14, 2009 12:44 am
Forum: PSP Development
Topic: Slim 1.8v to 5v SAFE level shifter for sio
Replies: 8
Views: 3486

I cannot remember how man times i repeated this (specifically on THAT italian site's board)... No one needs to use a max level shifter to enstabilish communication between the PSP and a microcontroller. New Microchip's microampere technology allow us to power chip directly from SIO (the fact that my...
by jean
Sat Mar 14, 2009 12:33 am
Forum: PSP Development
Topic: SIO what is it
Replies: 6
Views: 2686

Sorry to insist on this but no. There's no way someone reading a minimum of 2-3 pages or posts on this topic could confuse a usb port with SIO. You're lazy and i was kidding about this, fullstop. No one will kill you for this anyway :)
by jean
Fri Mar 13, 2009 9:13 pm
Forum: PSP Development
Topic: SIO what is it
Replies: 6
Views: 2686

There's only a word to describe your attitude: laziness. If you bothered to search, not only you would have found that SIO equals to Serial Input Output, but you would have found dozens of projects involving SIO for debug or to attach keyboards, to connect with external devices such as barcode reade...
by jean
Tue Mar 10, 2009 9:31 pm
Forum: PSP Development
Topic: Exception handling capabilities
Replies: 21
Views: 6461

very very nice...thank you for sharing: will surely use something like this.
by jean
Sun Mar 01, 2009 7:57 pm
Forum: PSP Development
Topic: How to read what drives are available
Replies: 7
Views: 2932

Dariusc123456 wrote:There's
host0:

There is more, but not everyone of them can be access just like that.
O_o
by jean
Fri Feb 27, 2009 1:07 am
Forum: PSP Development
Topic: OSK in XMB prx plugin
Replies: 7
Views: 2730

I don't know if i have well understood, but Torch, do you have any suggestion on how to find already loaded OSKs?
by jean
Mon Feb 23, 2009 1:08 am
Forum: PSP Development
Topic: How to decrypt a prx
Replies: 6
Views: 2811

mmhh.. i think i misunderstood the sentence
I want to use prx's from other applications like maybe irshell or other things
Let's say i meant :you dont' have ALWAYS to decrypt a prx to use it...
by jean
Mon Feb 23, 2009 12:46 am
Forum: PSP Development
Topic: a plugin that does ???
Replies: 5
Views: 2252

Again: be kind, please; no need to be ironic...if you could make you request better understandable, we would at least point you ~User~ somewhere else in the net; because this is definitely not the place to ask what -and the way- you do. It's not arrogance: it's only that you would never go to the bu...