MMC5 pinout error on wiki?

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plgDavid
Posts: 16
Joined: Tue Aug 07, 2012 11:01 am

MMC5 pinout error on wiki?

Post by plgDavid » Sat Apr 16, 2016 6:13 pm

Hello

Was investigating an issue I have with a MMC5 test cart (Just Breed - HVC-EKROM-01) and noticed the pinout on http://wiki.nesdev.com/w/index.php/MMC5_pinout didn't list a !ROMSEL entry.

I continuity tested it from pin 44 from the famicom connector straight to MMC5 pin 78 (just right from M2), which is non connected (NC) in the wiki. Error, oversight, or its this way on other boards? (doubtful)

Thanks

lidnariq
Posts: 8778
Joined: Sun Apr 13, 2008 11:12 am
Location: Seattle

Re: MMC5 pinout error on wiki?

Post by lidnariq » Sat Apr 16, 2016 6:20 pm

I consider the MMC5 pinout on the wiki to be pretty dubious right now; when tracing pictures I keep on finding weird discrepancies.

In any case, I just measured a copy of Laser Invasion (NES-ELROM-01) and found the same connectivity that you did, so I'll add that.

plgDavid
Posts: 16
Joined: Tue Aug 07, 2012 11:01 am

Re: MMC5 pinout error on wiki?

Post by plgDavid » Sat Apr 16, 2016 6:21 pm

lidnariq wrote:I consider the MMC5 pinout on the wiki to be pretty dubious right now; when tracing pictures I keep on finding weird discrepancies.

In any case, I just measured a copy of Laser Invasion (NES-ELROM-01) and found the same connectivity that you did, so I'll add that.
Thanks for confirming!

zzo38
Posts: 1050
Joined: Mon Feb 07, 2011 12:46 pm

Re: MMC5 pinout error on wiki?

Post by zzo38 » Sat Apr 16, 2016 8:03 pm

Differences of MMC5B should also be figured out. Possibly there is no differences visible to software in which case submapper numbers are not needed (although the wiki should describe the differences anyways); if MMC5B does have differences which are visible in software then possibly the remaining bit of my proposal of MMC5 submapper number can be assigned for this purpose (using a convention that if the bit is clear is whichever one is compatible with all existing games, if possible).
[url=gopher://zzo38computer.org/].[/url]

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