Re: RE: Galaga - problems setting Rank D

From: Rodger Boots <>
Date: Fri Nov 05 2010 - 00:07:29 EDT

Wasn't this one of those games where there were more than one board set?
Something like one set only had 2 Z80s and a custom processor and another
board had 3 Z80s.

Or like Pole Position where there was an Atari board set and a Namco set
that were VERY different.

If you want to see something undocumented (like your freeze switch oddity),
the original Breakout won't reset the bricks if the game is started with the
serve button pressed. Don't even want to say how long it took to figure
THAT one out!
On Nov 4, 2010 10:53 PM, "Matt J. McCullar" <> wrote:
> Wow! Nice work, Rodney! I don't know if Namco ever did go out of their way
> to tell anyone about this, but I can testify that I've never seen this
> tip in any manual anywhere: If the FREEZE VIDEO switch is on when you
> up the game, it will continuously cycle through the boot-up sequence
> ever actually starting the game. (You know those screens full of running
> garbage and the explosion sound? It will do that over and over and
> I spent a hell of a lot of time trying to "fix" a "bad" boardset with this
> "problem"!
> Matt
> -----Original Message-----
> From:
> []On Behalf Of Rodney Minch
> Sent: Thursday, November 04, 2010 9:38 PM
> To:
> Subject: Re: RASTER: Galaga - problems setting Rank D
> 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
> 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.
> Rodney
> 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
> 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:
> []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
> C. I can only get the game to show Rank A or Rank C. Basically SW2 is
> 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
> 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
> 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 Fri Nov 5 00:07:32 2010

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