Re: Dig Dug freeze problem

I like it when help I offer actually "works" - hehe!

I'd like to add my hat to the "Free Play Hack" need. If the game used a
standard leaf switch as a 1 or 2 player start button, I would just stack
another "coin switch" with some fish paper like a pinball machine, but
micro switches prevent that.

I rigged a switch behind the right coin eject to add credits. You just
push the coin eject and a credit is added. When Mark Davidson came over,
he was wondering how I did this and what sort of custom bracket I had used
to accomplish this task. He seemed let down when he saw the thick rebent
paper-clip wire holding a leaf switch in place and kinda moving the wrong
way when the eject is pressed. It's not elegant, but it works.

Free Play would rock though.

Congrats on getting it working! I've had a lot of Dig Dug boards in the
past, but only 2 that worked. I've never had any luck getting a dead one
to work.

Take Care,

-Al-

> 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 12:53:39 2004