search

kalymos / PsNee

PsNee, an open source stealth modchip for the Sony Playstation 1
476 stars 70 forks source link

PM-41(2) PAL different layout #21

Closed klode82 closed 1 year ago

klode82 commented 4 years ago

I cannot find all points to made solders on my PCB. I'm working with an Arduino Nano with ATMega.

This is the PCB: https://imgur.com/tgAdHI5

ramapcsx2 commented 4 years ago

Try this: https://i.imgur.com/68TnVRw.jpg

You can't see both points for pin4/pin5, but they are the BIOS patch.
In this method, both points don't connect to the actual BIOS chip, but to test points near the CPU. This works just as well and saves space.
Beep them out with your multimeter.

klode82 commented 4 years ago

Thanks a lot!, but is not too easy understand where the wired are connected on the Nano, and a wire is hidden (the pins 4 and 5...) Thanks to your image, I've realized this one.

https://imgur.com/a/g9mkhkB

Please, can you help me to identify D4 and D5?

Thanks.

ramapcsx2 commented 4 years ago

Sorry, I don't have a board out to find the pins.
Use your multimeter to find out where the BIOS pins A18 and D2 route to on the mainboard.
And if you don't have a multimeter, you have to get one in any case ;p

klode82 commented 4 years ago

Don't worry, I've found all Pins.

https://imgur.com/vJZQBQL

I'll try as soon as possible.