PlayStation 1 SCPH-900x Modchip Problem

We did this last time.

Try selecting the C version, theres a screenshot in the thread you linked.

 

Eh, never mind. I read the old topic. You already told me: http://www.assemblergames.com/forum...PH-102-(PSone)&p=521904&viewfull=1#post521904



Sorry, didn't refresh.

Okay, it flashed fine.
Now lets see if it worked

 

Nope. Does not work.

Says it flashed fine and I verified it.
It wont let me erase of course, because it thinks it is a C based chip.

I will dump it back and see if the HEX matches with the original.

I wired it to a SCPH-5502 and I wired it correctly. My wiring is fine. It would be the programmer / chip.

 

The HEX does not match. I dont know what this programmer is doing...

I give up.

 

want me to send you some chips?

cover costs (chip + shipping) and you can have a few.

 

Uhm probably not at the moment. Maybe later.

I may have a go at making this.
How does this work exactly though. Do I get the PIC16C84 and then wire TxD, GND, CTS, DTR and RTS to the PIC I want to program?

 

TxD, GND, CTS, DTR and RTS are the serial port of your PC.

Connections to the chip are shown in the picture.

 

Apparently you can use IC-Prog with your willem.

check out
http://www.mmmonkey.co.uk/console/downloads/WillemPPT.pdf

and here is how to program 12F508/9 with that software:

http://feng3.nobody.jp/en/howto12f509.html

 

Nope. Not working either. IC-Prog just gives me error after error after error, hangs and freezes my system.

I will just build the JDM programmer. It is easy to build. When I am done, I will upload a photo for you

 

Here is a good guide. PCB files are already made too...
http://www.eeweb.com/project/circuit_projects/pic-and-eeprom-programmer

 

The diagrams are for a 4 and 5 wire installs, commonly used with Old Crow Code or Anti-Piracy Code.

All modchips share 4 things in common
Pin1 Power
Pin8 Ground
Pin5 GATE
Pin6 DATA

The reason it worked with backups when you used the MM3 diagrams is because you had PIN6 connected correctly, but failed to boot original because you needed a link cable and no use for PIN5

You might be wondering what PIN4 and PIN7 are
PIN4 Reset Switch
PIN7 Door Switch

 

I used icprog (JDM Programmer schematic) back in 2006/2007 and I can confirm it works. I used it on Windows XP with directport.
I remember icprog spewing errors like crazy, but it actually wrote the correct hex on the PIC (12 C 508-04/P).
I think I wasn't able to check if the "programming" was done successfully but i decided to solder the chip anyway (on SCPH9002 model) and to my surprise it worked perfectly.

Maybe you have a wrong hex. If you want I can send you mine, just PM me.