Re: Galaga - problems setting Rank D

From: Rodney Minch <>
Date: Thu Nov 04 2010 - 23:37:33 EDT

Matt - you nailed it. I was just getting ready to send out an email with
what I discovered tonight when I saw your post. I put the game back in test
mode and started moving the dip switches one by one to see what changes it
made, which is when I discovered that on this boardset SW1 and SW2 control
the difficulty. Once I put SW1 on and SW2 off the game was showing Rank D.

Did Namco release a service bulletin or anything like that to let people
know that the dip switch settings on some boards are different? I couldn't
find any information that talked about this. The multiple sources where I
looked up the dip switch settings for Galaga were all the same as the
manual, which states SW2 & SW3 control the difficulty/rank.


On Thu, Nov 4, 2010 at 11:15 PM, Matt J. McCullar <>wrote:

> Rodney, I don't have my _Galaga_ notes handy right now, but I think there
> may be the slight possibility that some _Galaga_ boardsets had slightly
> different DIP switch settings for difficulty levels. I think I had a
> similar problem a while back but I can't remember for sure. If the boardset
> you have is at least working properly, put it into self-test and see if
> other DIP switches might have some effect.
> Matt J. McCullar
> Fort Worth, TX
> -----Original Message-----
> *From:* [mailto:
>]*On Behalf Of *Rodney Minch
> *Sent:* Wednesday, November 03, 2010 11:34 AM
> *To:*
> *Subject:* RASTER: Galaga - problems setting Rank D
> I've got an original Galaga board that I've set the dip switches to Rank D
> (Dip Switch 6J, SW2=On, SW3=Off) but the game shows it's set to Rank C. I
> can only get the game to show Rank A or Rank C. Basically SW2 is always
> stuck at Off no matter if the dip switch is set to on or off. I've used my
> DMM to verify SW2 is working properly. I also verified the trace going from
> SW2 to pin 3 of the 74LS151 at 4K is good per the schematics.
> All the other dip switches at 6J are working fine along with all the dip
> switches at 6K. Any ideas what could be going on here? Could the 74LS151 at
> 4K be bad?
> The weird thing is another person local to me had a Galaga board that was
> doing the exact same thing as this one. Not sure if this is a common
> problem or what.
> Any help would be appreciated. Thanks.
> Rodney

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Received on Thu Nov 4 23:37:36 2010

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