sega saturn 20pin modchip info

Only one MUX of the '157 is used so that's the minute difference with 22V10 types. The normal 16V8 logic isn't very complicated (but it is secure too), I've determined (logically, not empirically) that it implements a 4 bit parallel-load SR and 2 bit counter for seamless reloading, I forget what the other two outputs are for... The PIC controlled (IIRC) MUX just selects between the PIC and drive data. A parallel interface is required since the PIC isn't nearly fast enough to serialize the data, it can barely keep up as is.

Decapping the PIC really isn't necessary, plus the decapping is only the start of that process, it needs to be doped and photographed, transcribed and reverified, then you need someone smart to figure out the decoding scheme from the rest of the layout. It's quite a process even when things go smoothly. Since basically all that's needed is the data stream and timing, the only real requirement is a clever person, their computer and some parallel I/O (parallel port, Arduino or whatever) to coax the data out of the modchip.

 

Sorry for my english but... this is a mod chip for sega saturn model 1 20 pins??? :O

 

Chip arrived.

Will look into converting a "rob webb" chip soon and post information as I have it.

 

cool, let us know how you get on

 

Glad it finally arrived, my post office has been full of @@#$@#$ the last few weeks.

 

Any update on this?

 

Its sitting in my "to do pile"

I currently have a lot of work on from various people/forums. I have some model 1's to look at soon and I have no chips for them (but do have the console goods style). So when I look at those, I will test the theory then.

 

I recently converted the SSIC8A for someone - took something like 3 hours due to complications from ribbons (gotta be a better way to interface it). PITA with that cheap, flexing PCB but I could probably tackle the 7Bs I've got on hand if someone were to offer a price worth my time.

 

My plan is to not mod the chip itself, but to just swap the signals on the 2 ribbon cables.

 

I have the same chip that Ape has I was wondering if I could get some install help, It was installed in the console and only works half way (console was finicky about discs) I took it out It now boots originals and cd-r through swap trick. With the chip in it boots originals most of the time and hardly ever boots cd-rs, The console also has US/JP switch. The chip only has 5v wire no signal wire. Does that chip need a signal wire thanks

 

Hello guys!

I am looking for ribbon cable 20 pin for sega saturn model 1. Its any store can sell of them or any solution can help me?

Thank you ^^

 

Use a 21 pin one and cut off one of its legs. That's what I did.

 

Where would you buy the sockets for the ribbion cable? if you can build these mod chips?

 

Thank you my friend! I will do this too!

 

This is something I'm wondering too, I've been looking but only found them for stupid prices due to lack of availability, and I had to end up cannibalizing broken chips for parts.
They are called 20/21pin THT vertical FFC connectors by the way - maybe someone has more luck finding them.

 

http://www.ebay.co.uk/sch/i.html?_n...tt_encode=raw&keyword=ffc+20+pin&geo_id=32101

pricing sux but if you need them 20pin connectors and theres the 20pin ribbon cables

 

Those use SMD contacts, not THT. You'd have to bend the pins on it so they fit through the holes.

 

very interesting if someone discover how this mod chip works...

 

Would hopefully make cheap chips? i hope.

 

Its known. Just don't think anyone in a position to put all the pieces of the puzzle together finds the return on the investment worth their time. Hell, I'd do it if I had the cash but I like doing things for the sake of doing them. The chips would probably have to cost more than $40 a pop as well making them less cost effective than existing sources. Then again if one could make a chip with dual 20/21 pin support as well as "dummy proof" 64pin support AND improved Sanyo support (I've found all chips support the Sanyo Saturns but they have odd behaviors to get the damn things to run discs) you might get away with $50-60 chips until scale can bring the price down.

Not at first.