Re: Dig Dug freeze problem

Well, solved my 'problem'. Broke down last night and built an adapter
harness for my test bench and began looking at both my Dig Dug PCBs.
Taking Al's lead, I looked at the components around the two banks of dip
switches. Moved a couple of dip switches and the game came up!

Now, I am aware there is a dip switch on a Dig Dug PCB that freezes
gameplay. Is this feature useful? Dunno. The odd thing is, the 'freeze'
dip switch was set in the 'off' position such that the game would play
normally. There was another dip switch (5 I believe it was) which has
nothing to do with freezing the game. In fact, it is only used for
Continuation. It was also set to the 'off' position and cased the freeze
during bootup. And since I set up both PCBs with the same dip switch
settings, they both exhibited this 'problem'.

Nice. :)

Anyone hacked through the Dig Dug code to implement free play yet?

tom

Al Warner wrote:
>
> I had a similar problem with my Space Duel. It ended up being one of
> the
> resistors in line with the DIP switches was broken in half. I changed
> it
> and the DIP switch worked properly. The one that was bad on mine was
> the
> one that controlled Free Play. Because Space Duel doesn't have
> attract
> mode in Free Play, I had to set it for coins.
>
> Good Luck,
>
> Al
>
> > I have two Dig Dug PCBs which are exhibiting the same
> > problem. In two different Dig Dug cabinets. Weird.
> >
> > The game will boot up just to the beginning of attract
> > mode, and then freeze. There will be 9 Dig Dug characters
> > at the bottom of the screen and the game will not advance,
> > nor will it coin up.
> >
> > In self test, everything checks out ok.
> >
> > Here's a picture of the screen:
> > http://www.ionpool.net/dig_dug.jpg
> >
> >
> > I did a quick swap of the three Z80s and it had no effect.
> > I have also checked to make sure the 'Freeze' dip switch
> > is not turned on. Suggestions?

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Received on Thu Jan 15 11:47:45 2004