The PAL PSOne check may be the same as they use for Japan, not sure. The Japan BIOS is largely different from the other regions, so I guess the check is a little different as well. In any case, the Onechip code is able to work around the protection by luck :p It turns out that there is one region co...

Import Player Light (Google) is a good boot disk. It just has to have a Japan license sector. If you can't find an .iso with the correct license sector, another tool "setregion" can change it.

Yep, Gameshark, Xploder, any clone device, they'll all work for this.

This gets asked a lot, so I think I should include some info in the PsNee sketch. The BIOS shell code in Japanese machines produced early 1995 and after has a region check in it. It will not run out of region (PAL, NTSC-U) disks, even if they have been authorized by the modchip. There are only worka...

Awesome work here, can't believe the old xflash seeing some nice updates!

A 60Hz patcher would be so awesome. PAL users usually have much better access to those titles, but no one really wants to endure 50Hz gameplay ... I think one of the best working patchers is actually Import Player Light (a further developed Import Player CD): ImportPlayer Light is an utility that al...

The problem might be from Arduino, so don't worry too much. I get errors regarding the usage of pins in that function, which means the compiler is looking at it when it should not. Surrounding NTSC_fix() with "#ifdef APPLY_PSONE_PAL_BIOS_PATCH" fixes the issue. Applying this fix produced a...

superg:
Do you have an updated code base for your version?
Using your current git master branch just complains about errors in NTSC_fix(), even though I disabled the function per #define.

Just in case you don't have time, I can take over from here, but I'll have to make assumptions :p

Following your progress closely here :) You mentioned using an oldcrow modchip in the PSOne. I'm not sure if that's possible with the old code, but maybe it'll work if you use the "link wire" method. Since you already have a microcontroller in there, maybe it's feasable to use it as the mo...

damiank94: The matter of signal quality has many aspects to it, so it is hard to give a definite answer to your questions. As the quote from William Quade says, it isn't even fully understood with veteran modders (probably for lack of time / interest, they haven't looked into it more). I can give yo...

Yep, the chirping noise is a problem of injecting the unlock code into the CD controller.
Every modchip has to do this to work.
So the fix to the issue would be to find a better injection point to solder to, or to use different components to try and reduce the issue.

Regarding XP activation: I just build another retro PC and installed an old XP SP3 on it. Since I'll never connect it to the Internet, I had to try some alternatives. Most fixes only work briefly, or the system locks you out unexpectedly at some point. Only one solution seems to work reliably: Find ...

Learning some C, eh? :) You did the right thing and went with books. This is probably the best way still to cover the important details. Since you already have some experience with another language, it should be trivial up to the pointers chapter. You should do that chapter as if it was a graded cou...

Thanks for testing!
Well, that's thoroughly disappointing though. It starts to look like a real hardware (or maybe Kernel?) limitation.
Still have the big guns in reserve of course (hardware mods and BIOS patches) :p

Yeah, the board is toast.
It'd be a huge repair project for a professional with proper tools.

Okay, did you also check some lower speeds?
The sending and receiving side need to use the same baud rate, and trying out a lower speed can test if that works.

brill:
Is it possible to override the baud rate in these tools?
I always wonder how fast the port can go, but I lack the time to setup all the required stuff.

Long wires aren't usually a problem.
Fuses should be documented somewhere :p

Afaik, we only use this board for PsNee talk.
I have another huge project that takes most of my time (gbscontrol).

Hey, the problem is with the installation or the Arduino board for sure. It already fails on the PU-22 detection, so the chip is seeing jumping voltages there when it shouldn't. Are the pin assignments correct? If not sure, try to focus on debugging the PU-22 detection pin first. Edit: And since tes...

Very impressive work! Software development isn't my PSX niche, but knowing that single step debugging is now possible is great :) Regarding your efforts with the parallel port: Developers for PSX quickly reach out to this port when they want more speed. Sometimes it works out, sometimes it doesn't. ...

Yep, seems to be good quality again.
Now these pads just have to go on offer without the console thing ;p