Re: 2114's ->RE: BattleZone probs....

Yeah - the part number was 2114-AL that I used and it gave me problems. -
And yes, funny that Mark would mention checking the roms to make sure they
were seated properly in their sockets. My Battlezone complained about a
bad rom - all I did was push it in with my thumb (I could here a small
click) and then it was happy.

Matt

_____________________________________________________________________

On Mon, 18 Jan 1999, Todd Miller wrote:

> I also experienced similar problems with 2114's on several of my Sega
> G08 X-Y boards.
> I had bought a bunch from BGI (2114AL- 2 ?) and since they were faster I
> assumed they
> should perform just as well, no such luck . I also tried 2148's with no
> luck. I ended up
> talking some older 2114's off of another PCB to solve the problem. Why
> is this ? can
> anyone explain ? Clay, didn't you discuss at one time making a simple
> 2114 tester ?
>
> Todd Miller, IT Operations Dept.
> Ron Weber and Associates
> 103 E. State Street, Mason City, IA 50401
> (515)423-4293/(515)423-4594 FAX
> http://www.telethinking.com
>
>
> -----Original Message-----
> From: Matt Rossiter - Verio Southern California
> [SMTP:matt@rossiters.com]
> Sent: Sunday, January 17, 1999 10:43 PM
> To: vectorlist@mcfeeley.cc.utexas.edu
> Subject: 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 Mon Jan 18 10:51:26 1999