Expansion audio cartridge converter help

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radel999
Posts: 12
Joined: Sat Sep 15, 2012 1:34 pm

Expansion audio cartridge converter help

Post by radel999 » Wed Apr 11, 2018 5:18 am

Hello
I buyed a another cartridge converter but i wanna mod to work expansion audio but i have a problem
Where i must soldeing to work
Image
I Ask because i must put NES Cartridge back to label to work and i don't know where i must put the resistors

lidnariq
Posts: 9702
Joined: Sun Apr 13, 2008 11:12 am
Location: Seattle

Re: Expansion audio cartridge converter help

Post by lidnariq » Wed Apr 11, 2018 9:52 am

I've marked pin numbers on your picture:
rwunsy_pins_marked.jpg
See https://wiki.nesdev.com/w/index.php/Cartridge_connector


I think they might have already connected pin 51 for you... but to be certain I'd have to see the other side.

radel999
Posts: 12
Joined: Sat Sep 15, 2012 1:34 pm

Re: Expansion audio cartridge converter help

Post by radel999 » Wed Apr 11, 2018 10:31 am

lidnariq wrote:I've marked pin numbers on your picture:
rwunsy_pins_marked.jpg
See https://wiki.nesdev.com/w/index.php/Cartridge_connector


I think they might have already connected pin 51 for you... but to be certain I'd have to see the other side.
Image [Converted to link because the image is too large for many users' displays. --MOD]

Here is a backside

lidnariq
Posts: 9702
Joined: Sun Apr 13, 2008 11:12 am
Location: Seattle

Re: Expansion audio cartridge converter help

Post by lidnariq » Wed Apr 11, 2018 10:45 am

Yeah, they already connected audio for you. I've marked it in purple here:
fused_front_and_back_with_expansion_audio_marked.jpg
Unfortunately, I don't know if 72-pin connector pin 51 is actually used by anything. What pins you'll want to connect depends on what 72-pin cart with expansion audio you're trying to use... and depending on the exact hardware, you might need to cut traces and add a resistor.

radel999
Posts: 12
Joined: Sat Sep 15, 2012 1:34 pm

Re: Expansion audio cartridge converter help

Post by radel999 » Wed Apr 11, 2018 11:03 am

lidnariq wrote:Yeah, they already connected audio for you. I've marked it in purple here:
fused_front_and_back_with_expansion_audio_marked.jpg
Unfortunately, I don't know if 72-pin connector pin 51 is actually used by anything. What pins you'll want to connect depends on what 72-pin cart with expansion audio you're trying to use... and depending on the exact hardware, you might need to cut traces and add a resistor.
Using simple Cabel or using Resistors?

lidnariq
Posts: 9702
Joined: Sun Apr 13, 2008 11:12 am
Location: Seattle

Re: Expansion audio cartridge converter help

Post by lidnariq » Wed Apr 11, 2018 11:10 am

It depends on the specific cart you want to play.

radel999
Posts: 12
Joined: Sat Sep 15, 2012 1:34 pm

Re: Expansion audio cartridge converter help

Post by radel999 » Wed Apr 11, 2018 11:14 am

lidnariq wrote:It depends on the specific cart you want to play.
I wanna run Everdrive on my Famicom/Pegasus

lidnariq
Posts: 9702
Joined: Sun Apr 13, 2008 11:12 am
Location: Seattle

Re: Expansion audio cartridge converter help

Post by lidnariq » Wed Apr 11, 2018 11:26 am

The current trace (that I've highlighted in purple) connects "EXP9" to the famicom audio loop.

The Everdrive N8 appears to connect "EXP6" instead.

You can see what happens if you just add a wire shorting out EXP6 and EXP9. If it works, great.

If it doesn't, you may need to do a lot more rework.

radel999
Posts: 12
Joined: Sat Sep 15, 2012 1:34 pm

Re: Expansion audio cartridge converter help

Post by radel999 » Wed Apr 11, 2018 11:31 am

lidnariq wrote:The current trace (that I've highlighted in purple) connects "EXP9" to the famicom audio loop.

The Everdrive N8 appears to connect "EXP6" instead.

You can see what happens if you just add a wire shorting out EXP6 and EXP9. If it works, great.

If it doesn't, you may need to do a lot more rework.
Hmm, You can make a sheme how to connect in order to Adapter supports a expansion audio from everdrive?

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