Re: BattleZone probs....

I've had the same problem with some of my old 2114's so I thought they
were all bad...so, there are other problems, eh?

John :-#)#

Matt Rossiter - Verio Southern California wrote:
>
> I had a problem just like this about a year ago. Mine was complaing that
> one of the 2114s was bad. So I replaced it, then it complained that
> another one was bad - and so on. ~augh~. Well it turns out that
> Battlezone (or other 80's games that use 2114 chips) will choke on newer
> versions of 2114 chips. I can't remember that exact part number - but I
> know it was an Intel. The newer ones are faster and do cause problems on
> Battlezones.
>
> To make a long story short, I put in an older version and everything
> worked perfectly.
>
> Hope that helps.
>
> Matt
> _____________________________________________________________________
>
> On Mon, 18 Jan 1999, Peter Pachla wrote:
>
> > Been having another crack at fixing my BattleZone tonight and I'm somewhat
> > confused....
> >
> > The last time I looked at it (a few months back) the self-test routine told me
> > that one of the ROMs was bad, now it's telling me that (another) one of the RAM
> > chips has failed.
> >
> > I can't understand why this would be. I've tested all of the TTL on the board
> > with a logic comparator and none of the chips appear bad (I had to replace
> > three before) so it shouldn't be a memory decoding problem.
> >
> > Now, before I got the machine my friend who owned it then had to repair the
> > Audio/Reg II board since the 2N3055 on it packed up. He replaced it with a
> > fixed voltage regulator (modifying the circuit appropriately) and I've noticed
> > that the voltage reaching the analogue vector generator board is a little on
> > the low side at 4.73V, just outside normal TTL power specs.
> >
> > I'm assuming that this is causing my problems?
> >
> > My friend couldn't get a 2N3055 which is why he used a voltage regulator
> > instead. Are 2N3055s still available, if not can anyone suggest a suitable
> > alternative as I intend to reverse his mods and put things back the way they
> > should be?
> >
> >
> > Back to tonight's "Voyager" (we're only about 18 months behind you guys on this
> > side of the pond).
> >
> >
> > TTFN - Pete.
> >
> > --
> > Peter Pachla: Computer Hardware & Software Engineer,
> > Sound Engineer,
> > Arcade Machines Collector,
> > Obsolete Computer\Games Console Collector,
> > Barman,
> > & General Fun Guy....
> >
> > E-Mail: peter.pachla@virgin.net (primary account)
> > peter.pachla@vectrex.freeserve.co.uk
> > peter.pachla@wintermute.free-online.co.uk
> > --
> >
> >

-- 
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