PS1 Modchip Burning

Ok, I need to know a cheap writer that can write these kind of eeprom and otherkinds of eeproms http://search.digikey.com/scripts/dksearch/dksus.dll?pname&WT.z_cid=ref_octopart_dkc_buynow&site=us〈=en&name=ATTINY13-20PU-ND

I really have no idea about this kind of stuff ,but im going to be making some ps1 modchips.

 

this is where I bought my programmer
http://www.mcumall.com/comersus/store/LeftStart.asp?idCategory=27

If you don't want to buy one, you can always make one.

Part​

Quantity​

Remark​

Female D-SUB 9 connector​

1​

A connector that fits into a db9 port on the back of your computer.​

22k ohm Carbon resistor​

1​

1/4 or 1/2 watt 5%​

2.2k ohm Carbon resistor​

1​

1/4 or 1/2 watt 5%​

10k ohm Carbon resistor​

1​

1/4 or 1/2 watt 5%​

USB Male​

1​

You need to cut this.​

BS170​

1​

8 PIN DIP SOCKET​

1​

Stripboard​

1​

 

Would a jdm pic writer work?

 

Yes if it supports the PIC you are using. Do you have PS1 modchip HEX code and the appropriate PIC chip to put that code on? The 12F629 PIC is programmable by the JDM PIC programmer by MCUMALL and someone did release modchip code for it, but it isn't stealth.

 

If it isn't stealthed its worthless. Even if you don't want to play Resident Evil Survivor you probably will Final Fantasy 8. Both of which will refuse to boot unless patched but good luck trying to get end users to do that.

The MM3 code is out and about and does stealth.

 

There are cheat codes to get around those pesky games... I have a non-stealth chip installed in my PS1, and have a Caetla-flashed Xplorer cartridge attached. All I needed to do was add the code and enable it before I run the game.

 

Installing a chip with good code is a lot simpler than that, plus I get the benefit of popping the disc in and running with it.

Though I'm sure the cart would be useful for cheating and/or debug bits.

 

The 'stealth' code is nothing special either - it simply turns off the boot data broadcast after a few seconds. There's plenty of code around for the 12F629 PIC, including so called 'stealth' code.

 

yeah i do have the appropirate hex it was recently ported to the chip in june so i would think it has stealth patching, ill look into the code and see if it does

EDIT: Would a serial to usb adapter work for the PIC programmer if not ill dig out the old windows 98

 

It might but I wouldn't bet on it. Might find that you need an older machine to be able to use it as well. Parallel and serial implementations on most hardware made in the last 5 years has been rather crappy.

 

Ok, then i will dig out the windows 98

 

No, Serial to USB adapters will NOT work with most PIC programmers - cheap ones are based on the JDM programmers and require true +12/-12V EIA-232C
signals. No USB to Serial cable can deliver that since USB only offers 5v max.

 

Easily fixed, however I've found more often than not the spec for the serial port is typically not 100% what the device is expecting on modern systems in the first place. Same goes with the software, often times it can't work with the OS' implementation for serial communications (I'm looking at you Windows 7 and Vista) or it works but the software really doesn't like something along the line.

Windows 98 and something made around 2000 would be a great way to nearly guarantee functionality. I keep an old Pentium III box around for just such occasions.

 

I got a cheap JDM programmer off ebay, I've used it with 12f629's and garyopa's stealth 4 port in the past, worked fine

 

@ derek
are you sure it's stealth?
from what I remember it's just a 4 wire basic chip.

 

could be mistaken, dont really care

edit: and yeah my bad, garyopa's is just 4 wire, though I do have the stealth 4 hex lying around too

 

i use pic start plus any one want chips done let me know.

 

Stealth is not just a matter of turning things off after a few seconds. Some stealth games, early ones, can be defeated this way if the modchip stops sending the security codes before the game program starts. Dino Crisis I believe is one. But that doesn't necessarily work out in all cases. For one thing if you have a 4 wire chip, timing is based on when power is applied to the chip. If your game for some reason takes longer or not as long to boot up the timing may be off and maybe it won't boot at all or maybe the game will see the chip sending fake codes.

Stealth chips usually watch a few signals including the drive door status to know when to send the normal 3 security codes.

I'm not aware of any true stealth hex code available for the 12F629, if you do I'd like to get it. But MultiMode 3 (stealth) hex is available if you have the 12C508 PICs.