Re: BattleZone probs....

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
> --
>
>
Received on Sun Jan 17 22:42:30 1999