(PS1) Mayumi 4.0 12F683, 12F675, 12F629

The jumper wire: Is basically one end of the jumper where connection for Pin #2 on the Neo/Neo2.2 internal modchip goes and the other to the usb "Data -" pin on any of the usb ports (some models like V7 I think require a small component I think its an smd capacitor to be lifted from the board to make the connection).

 

What would the USB device be used for? Can't think of anything else than a dongle for protection.

 

The modchip itself is inside the usb enclosure so you plug it on the usb port and that's it PS2 is chipped and ready. The purpose was not dongle protection at all but ease of installation. It had a switch to turn it on and off because certain PS2 games required diferent steps. Anyways if this thing gets ported, people with old ps2's will have the ability to direct boot backup psx games without the need of an emulator and also play backup ps2 games with FMCB.

 

It can be done now but 508's are OTP chips and if something goes wrong bye bye chip...

 

12F508 works the same but you can reflash it anytime.

 

Here I can't even find 12C508 chips anymore. Only the F versions and they're very affordable.
On that Neo Key chip: It sounds like the "jumper wire" is for injecting the SCEx string and the device gets the timing from USB somehow. I don't think reversing that will be necessary. Does anyone even have such a thing still?
Personally, I'd be fine installing a regular chip in the consoles. You have to open it anyway.

 

Yes but all I have is a bunch of 12F629's LOL...

 

ok all i know. all picks need 5v. pin 1 +. pin 8 -. pin 6 scex signal. the 4 wire idont know where to put.

 

http://psx-scene.com/forums/f11/help-needed-neo-2-2-install-6411/#post39901

http://www.angelfire.com/super/modking/bin/3000x4.htm
http://www.eurasia.nu/modules.php?name=Downloads&d_op=viewdownload&cid=28

That's everything we need for a test, I think

 

The chip only uses 3 wires, the other wire (jumper) goes from the D- usb port pin to where pin#2 on Neo2/Neo2.2 chip would go. Also depending on version a resistor that goes to the usb port needs to be removed (some say it is not needed). If you want a better picture of where to solder the jumper just use for reference the "SX" point on the MODBO chip install.

I made at home plenty of these usb chips back in the days using 508's, they work flawlessly. I even used a plastic enclosure...

BTW you need a capacitor on Leg 6 of the chip... + side conected to the leg and - to the usb.

 

Here you go... Resistor and led are optional in our case if its for psx backups only you can avoid the switch also.

 

Here is my little bunch of 12F629...) (50pcs)
It's too bad I have to wait until 12F508 finaly comes to me, cause all I have right no is 12F629. it's good if you have later boards to use Maymi v4 with but if you have PU-7 or PU-8 - the MM3. It sucks. Really, Maumi v4 is so amazing that I cannot accept MM3 as good choise.
Is there any way to port Maumi v4 to work with old boards (PU-7 and 8)?

 

i think only hex 750x can work the way we want in the ps2. mayumi is great but where to solder 8 wires in ps2?? apexseal the way i see from your diagram is pin 1 + pin 8 - pin 6 scex ok i have a pic 12f683 and a pal console mord fustung can you port it for my pic and for my region??

 

ok looks like im gona try it next week on a slimline pal ps2 77004 i will take the +5v and -5v from the usb from inside the console i will put between 6 and scex point an 1 uf capacitor and i will put a switch to +5v so the chip wont give the scex signal unessesery

 

This thread is about Maumi v4 for PS1, so, I asked about using it with old PS1 revisions. Not PS2.

 

im on psx also. so yes i can confirm for psx the mayumi is the best.

 

Aren't pu-7/8 same as 100x/300x?

 

Is this the Mayumi diagram you're looking for? This is for PU-7. Mayumi has been ported to 12f629, hex file is on the first post.

 

This is PU-8 diagram I found:

 

Well, mostly. What's the point talking about these numbers? It is much easy and more accurate to say board revision cause the famous PU-7 might be in SCPH-3000, 3500 and maybe 5000. I do have three SCPH-3000 with PU-7 onboard and a lot of 1002 with PU-8, well, all I want to say - Sony is screwed up with these numbers, they don't mean much.
Mayumi 12F629/12F508 version for 7/8 is what I realy imtrested. And, of course, I want to understand what's with that 780x chip? Working of USB or syncronise by USB... some kind of stuff I never heard of.