ps1 one chip problem

http://www.maplin.co.uk/100-ohm-to-300-ohm-metal-film-0.6w-resistors-341564

180ohm

 

thank you for all ur help

 

Top top man bad ad just soldered the 180 ohm r on 8 and 16 works perfect now no messed up boot screen all game colour many thanks for all ur time and help

 

..........

 

no problem

 

@ Bad_AD84

I never said being able to program, makes me an expert.

Maybe in this case incorrect, but I had those same issues from other people and the problems where those I mentioned.
Pin 8 only tells the tv which ratio size (4:3 / 16:9) and pin 16 only if composite or rgb (auto channel switchting also).
So if there's 0V on pin 8 and pin 16, its ratio is set by the tv and the signal must be composite.
Sure, it can be that the problem is his tv then, cause every tv, no matter how old, should play 480i / 576i max.

I had the last week an issue with the SCPH-102c PM41-2 and OneChip PIC12C508A.
Code was correct, soldered in correctly.
Sometimes it gave me an image like the user posted here and always blurryness and distortions.
Also I had color on a PAL TV over composite, with a NTSC game.
That was very strange.
Seems like there are several OneChip codes around and mine is patched with the PAL/NTSC color fix, I found out.
This little mod here, fixed this issue: http://www.fatcat.co.nz/psx/install/102/diagrams/102pm41(2)_cf.jpg

 

I been installing chips since 1997 and not once have I called my self an expert. I guess anyone going to mmmonkey (great site ) and learning how to flash a pic is now an expert.

Bad_Ad knows his stuff. I don't think he has ever sold a chip with a failed flash. Higher chance to get a bad batch of chips from the manufacturer than failing at flashing.

I have never encounter bad video because of a proper modchip install. It's always the cable, disc or the actual hardware failing.

12C508A is not the only pic you can use
12C508, 12C509, 12C509A.

Yes, we are here to help but not misinformed.

 

Agree.
And if I can, i must add also 12Fxxx series to the list

 

That mod is all about the color encoding and nothing to do with the modchip. Using an rgb cable completely bypasses the need for the colour fix. So your user and this user had pretty much the same issue. The reason the resistor fixed this users problem is because by switching the TV into rgb mode - you don't need any colour fixes and you get better picture quality. As he said he had bought an rgb lead and then the symptoms he gave - it was clear the rgb lead was not working as intended.

What you are saying isn't making a lot of sense, which is why I pulled you up on it. If you are going to claim to be an expert - it makes people who don't really know much listen to you, thinking you are correct. Which you arent.

Everyone can have an opinion and everyone can get it wrong on occasion, but to claim you are an expert seems you are trying to make your opinion count more than others.

 

does any 1 no why the mod chip changes the boot screen to ntsc i did lean itz only when u connect points 3 and 4 it changes it but im sure points 3 and 4 are bios patch so it can boot imports

 

@ jinn

Sorry to say dude, but thats a vague supposition!

I call myself an expert on any subject I proofen myself to be an expert on, any time I want.
I'm an IT-programmer for living and hardware-technician as a hobby for any kind of electronic devices.

Also a vague supposition, thus he's only a human and humans have a lag of failure, also the hardware can have.

Wrong dude, very wrong.

Really, oh my, i did not know... *spoiler*

Well then, just shut up.


@ master991

12Fxxx suck. I tested them with open MM3 and GaryOpaV2 with any kind of PS1.


@ Bad_Ad84

Test it yourself, you'll see !

I know that.

Like I said, but not the same reason for failure !

I know that, I make all RGB cables myself for every console.

Proof it before judging.

What does an expert make? Having more information and experience than a common "just" user.
So I can claim to be an expert anytime. And I'm not here to argue about that fact.
I think you're an expert, because I think you know your stuff at what you do and you're good at.

 

i did try the color fix but it just changed the blue line down the middle to purple and still messed up rgb with 180 ohm fixed my problem

 

sounds legit to me.

So you got the first PSOne, not the rev2 PsOne ( PM41-(2) ) ?
Think I should just exchange my code with the one from Bad_Ad84 so that we both can see what happens.

 

pm41 mine is u solder under broad on that 1 i got the diagram off that aisa website

 

I have tested it, its a colour encoding fix by forcing the selection pin to always be PAL.

here is the appropriate part of the schematic, which shows the pinout of that chip and shows pin 13 being the NTSC/PAL selection pin:




Happy to compare your onechip code with the one I use though, just post or PM a link and ill do a comparison.

 

I know the schematic.
And I know what it is for.
But like I said, i got this failure and only this fixed it.

I post you a pm with links.

 

If that fixed it, TV wasn't using rgb.

 

All described in the pm I send you.

 

Your code is byte for byte identical to the code I use, with exactly the same installation. Which is exactly what I expected - there was only 1 version of ONEchip.

 

I don't know if you are trolling or what?
Can you describe why 12Fxxx series sucks, expert psx modchip flasher?