How to fix a NES mainboard without 10NES lockout chip ?

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bootyhuntah
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by bootyhuntah »

jims cool wrote:ya own two of them.. well one.. took the connecter off one to build a CopyFamES!.. it's a NES with a Famicom slot and CopyNES.. :lol:
Pictures please....
satchsatch33
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by satchsatch33 »

Is anyone can post any picture of it please ?
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bootyhuntah
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by bootyhuntah »

Well, if its too much trouble then don't worry about it.
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jims cool
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by jims cool »

i've been busy i'll make a thread about it soon.. i've been planing on the FC expansion port and a few other things.. it's not that interesting atm.. haven't added a port switch so i can have games in both slots yet :)
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bootyhuntah
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by bootyhuntah »

jims cool wrote:i've been busy i'll make a thread about it soon.. i've been planing on the FC expansion port and a few other things.. it's not that interesting atm.. haven't added a port switch so i can have games in both slots yet :)
I understand. It would be nice to see if, and when, you get a chance.
Last edited by bootyhuntah on Wed Feb 13, 2013 12:33 pm, edited 1 time in total.
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MottZilla
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by MottZilla »

Has anyone ever just installed a game cartridge CIC directly into their NES? Would you just need to lift the DATA IN/OUT pins on the NES Motherboard so that it would ignore any CIC in the inserted cartridge? Or would you need to lift any other pins? I'm just wondering if anyone has done this and made a schematic for going about defeating the lockout this way. And I suppose if the CIC reset signal still goes out to the cartridge then any multi-cart using that would still work.
lidnariq
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by lidnariq »

You could pretty easily stack the key on top of the lock ("stacked DIP") for all pins except pin 4 (LOCK/KEY). But I'm not clear that that's any easier…
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jims cool
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by jims cool »

you could lift pin 1 and 2 on the lock then take a key CIC and bend pin 1, 2, 4, 5, 9 and 10 upward
stack the chips (solder pins not bet upward)
solder a wire from pin 1 (out) on the lock to pin 2 (in) on the key
solder a wire from pin 2 (in) on the lock to pin 1 (out) on the key
solder a wire from pin 4 (key/lock) on the key to pin 8 (gound) on the key
that's a lot of work though :lol:

if you replace the CIC you need to find a game with 319xA.. the timing of the other chips would stop lots of games from booting
satchsatch33
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by satchsatch33 »

lidnariq wrote:Here's a photograph of it on my board.
Hello,

Is anyone can tell me please if it's a 1M ohms resistor (or another one) in this photograph?
Attachments
cicremove2.jpg
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lidnariq
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by lidnariq »

Yeah, that's the same 1M resistor that was there beforehand. I just moved one side.
satchsatch33
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by satchsatch33 »

OK, thx bro 8-)
satchsatch33
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by satchsatch33 »

lidnariq wrote:You're not a dummie :p

To reassure you, I've gone and tested the most recent one I posted on mine: it works just fine.

(Reposting: )
cicremove.png

I've tested this, and it worked perfectly......thx so lot :D
Great Hierophant
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by Great Hierophant »

This should be lidnariq's schematic with the extra resistor to allow CIC Reset-dependent cartridges like the PAL-only Super Mario Bros/Tetris/Nintendo World Cup and the official Nintendo World Championships 1990 cartridge to work properly :
cicremove.png
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dphirschler
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by dphirschler »

I have done the above NES lockout chip removal mod. See the attached photos.
Top side of board.
Top side of board.
Bottom side of board.
Bottom side of board.
At the moment, the NES is only giving me a gray screen. Although I have occasionally seen junk on the screen. I believe the soldering is sound. I suspect the 72pin since I also boiled and re-installed the original 72pin. However, I have checked continuity on the 72pin and even bent the bifurcated pins up. I said I suspect the 72pin, but as I have never done this particular NES removal mod I now suspect it. Has anybody here actually done this mod successfully?

Darryl

UPDATE: It is working now. Turns out it was the 72pin causing trouble. This mod works. So clean.
Last edited by dphirschler on Mon Dec 10, 2018 7:38 am, edited 1 time in total.
lidnariq
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Re: How to fix a NES mainboard without 10NES lockout chip ?

Post by lidnariq »

That's literally the thing I did. Your rework is a lot prettier than mine :)

Does the reset button do anything? At the very least, the LED should turn off while you're pressing it.
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