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Hacked a 21pin mod to 20 pin saturn
Pinchy - Nov 19, 2004

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  seal1 Jan 21, 2005

  
	
	

		
		

			Originally posted by mayden@Fri, 2005-01-21 @ 08:57 AM



Good job seal1, the scheme looks pretty damn good! I can see the wire en cutting jobs clearly. The smal red ones are the cuts I presume? But could you be a bit more specific on the "2-4 desolder" thing? For example those two in the top-left corner. I can't really make out which thing to desolder. I presume the modchip in this photo is in it's original state, so it's pretty hard for a n00b like me to figure out how it should be in it's "modded" state.



edit: in the scheme, what's that small yellow dot in the bottom-left corner? A wire cut?




[post=128158]Quoted post[/post]


the yellow in left bottom corner is only the number "one" for pin 1 - no cut only a mark.

(MID = middle pad between 0014 and 0019)

yes the small red ones are the cuts and/or the desolders.

desolders means - remove the solder iron to disconnect A-B or +5v-B or 0014-MID or MID-0019 if there is solder iron. I assume only 0014-MID is soldered per factory default which goes for 21pin-saturns before august 1996 (MID-0019 for 21pin-saturns during/from august 1996).

so per factory default you should desolder 0014-MID and desolder the wire from A coz it´s not needed for 20pin.

 Drenholm Jan 21, 2005
Is there anyone who will be willing to sell a working, modified modchip for use on a Model 1?

Also, does the fact that (as far as I can tell) both of my Saturns have 64-pin chips on the CD drive area mean that I can't fit a modchip?

I really hope not...

 seal1 Jan 21, 2005

  
	
	

		
		

			Originally posted by Drenholm@Fri, 2005-01-21 @ 04:35 PM



Is there anyone who will be willing to sell a working, modified modchip for use on a Model 1?



Also, does the fact that (as far as I can tell) both of my Saturns have 64-pin chips on the CD drive area mean that I can't fit a modchip?



I really hope not... 




[post=128167]Quoted post[/post]


I think we need to verify first in some 20pin models pinchy´s mod.

on which chip you counted the 64-pins ? which version is your cd-board ? how to identify ? ENR-007 and EMW10447-004E are the numbers stamped on my cd-board.

 Drenholm Jan 21, 2005
Thanks for your reply, seal1.

I will get back to you once I have checked out my 'Model 2'. I hope it's not just a Model 1 in a Model 2 case!!

 seal1 Jan 22, 2005

  
	
	

		
		

			Originally posted by Drenholm@Fri, 2005-01-21 @ 09:13 PM



Thanks for your reply, seal1.



I will get back to you once I have checked out my 'Model 2'. I hope it's not just a Model 1 in a Model 2 case!! 




[post=128187]Quoted post[/post]


seems better to go for a second "model 2" at ebay for some buck$, to be on the safe side than trying this mod ?

 Drenholm Jan 23, 2005
Yeah; I'm just hoping that I'll find a 21/32 Saturn!

 Sasurai Jan 24, 2005
seems that i am the first one besides pinchy who actually tried this mod, or not?

it does function well, the metal shielding at the mb connector must be cut or pushed away for a few mm.

the ribbon cable is long enough to fit, but it forces the modboard against the metal shielding, which shorten some of the pins, so there must be something inserted to keep the distance.

the saturn looks like pinchy´s one, the cd-board is EMW10447-006E (a big V beneath) ENR-007 (a big inverse white D)

 seal1 Jan 24, 2005

  
	
	

		
		

			Originally posted by Drenholm@Sun, 2005-01-23 @ 10:01 AM



Yeah; I'm just hoping that I'll find a 21/32 Saturn!  




[post=128293]Quoted post[/post]


all I know: 21pin must be with round button at least

but 32 or 64 - so how to identify ?

 seal1 Jan 24, 2005

  
	
	

		
		

			Originally posted by Sasurai@Mon, 2005-01-24 @ 02:17 PM



seems that i am the first one besides pinchy who actually tried this mod, or not[question_mark]



it does function well, the metal shielding at the mb connector must be cut or pushed away for a few mm.



the ribbon cable is long enough to fit, but it forces the modboard against the metal shielding, which shorten some of the pins, so there must be something inserted to keep the distance.



the saturn looks like pinchy´s one, the cd-board is EMW10447-006E (a big V beneath) ENR-007 (a big inverse white D)




[post=128315]Quoted post[/post]


ok sounds good.

did you:

>> Connect Pin 6 EM78->pin 5 C

or as identified "for me, my eyes/mind" on pinchy´s fotos (PHTO0005.JPG it looks like 6 C not 5 C)

>> Connect Pin 6 EM78->pin 6 C

(new wire from pin 6 em78 goes to upper row, which is even -> so 6 not 5 ?, coz you cutted connection to 7 which is lower row of connector, so upper must be 6 not 5 ?)

my 20pin saturn CD-board is EMW10447-004E (big V) and ENR-007 (big B)

no 32 or 64pin chip on topside of cd-board only a 24pin.

---

what is the magic about the 32pin, coz the extra wire from modchip to cd-board ? on my other saturn a 21pin modded with EMSIC7-modchip there is no extra wire. if this really needed or with other code on the modchip not necessary?

 Sasurai Jan 24, 2005
>> Connect Pin 6 EM78->pin 5 C

>or as identified "for me, my eyes/mind" on pinchy´s fotos (PHTO0005.JPG it looks like 6 C not 5 C)

it is pin 6, he probably mistyped it.

>my 20pin saturn CD-board is EMW10447-004E (big V) and ENR-007 (big B)

>no 32 or 64pin chip on topside of cd-board only a 24pin.

your cd-board is probably the same as mine, maybe an older/newer layout.

>what is the magic about the 32pin, coz the extra wire from modchip to cd-board ? on my other saturn a 21pin

>modded with EMSIC7-modchip there is no extra wire. if this really needed or with other code on the modchip not

>necessary?

the extra wire is for the 8mhz clock signal, which is needed to syncronize with the bus, which is stated in another thread is routed through pin 1 which directly goes to pad b, so you can also connect pad a+b instead of the cable to the cd-board (for the 21pin version, for the 20pin version the signal runs through pin 9 and that is why you connect pin 9 to pad a)

 Shakey Jake33 Jan 27, 2005

  
	
	

		
		

			Originally posted by Drenholm+Sat, 2005-01-22 @ 12:35 AM-->
QUOTE(Drenholm @ Sat, 2005-01-22 @ 12:35 AM)
Is there anyone who will be willing to sell a working, modified modchip for use on a Model 1?



[/b]



I second this actually. Assuming people can get this to work alright, I can see a lot of people wanting to buy some pre-modded chips for a fair bit

Eh, could just buy a model 2 and normal mod... but the Saturn fan in me see's that as cheating =P For me, the idea of fully modding my original Model 1 Japanese Grey Saturn just seems great!