Re: Armor Attack sounds and rom versions

Yes I am reading thru it.. I'll try to swap the sound boards. The slowest speed sounds ok and the squeak is always there and seems to sound fine. I'll check what you pointed out as I have most of these parts.. just didn't want to have to shotgun if someone had some ideas.
thanks.

--- On Tue, 6/2/09, William Boucher <boucher@mnsi.net> wrote:

> From: William Boucher <boucher@mnsi.net>
> Subject: Re: VECTOR: Armor Attack sounds and rom versions
> To: vectorlist@vectorlist.org
> Received: Tuesday, June 2, 2009, 8:57 PM
> Swap the audio boards and see if the
> tank sound problem follows the audio board or stays with the
> CCPU.  The shift register 74LS259 at F2 on the CCPU
> might be bad and causing inappropriate sound behavior.
>
> The tanks have two speed related sounds, the engine and the
> tread squeak. The squeaks stay the same but just repeat
> faster as the tank speeds up.  The engine rumble
> frequency has 15 levels.  The sound should not get
> louder and it should not get distorted.  The tank
> engine sound is the single most complex sound circuit and it
> consists of several chips and about 50 discrete passive
> components.  It's too complicated to go into it here
> but if the engine sound is okay at the lowest level and if
> the squeaks are okay too, then the logic is probably working
> okay.  It may be then that the opamp (8-pin DIP TL081)
> at location IC28 is bad.  This is especially suspect if
> the explosions and the morse code beep are also
> significantly noisy or distorted.  It is possible that
> the problem is in the final power stage of the amplifier
> (i.e. bad transistor Q12 or Q13 or bad TL081 at IC24.
>
> It's really hard to guess since I haven't actually heard it
> but maybe that'll get you started.
>
> If you get the Armor Attack manual pdf, there's a really
> good description in there of how all of the sounds are
> generated.
>
>
> William Boucher
> ----- Original Message ----- From: "andre" <livnfree_can@yahoo.com>
> To: <vectorlist@vectorlist.org>
> Sent: Tuesday, June 02, 2009 8:19 PM
> Subject: VECTOR: Armor Attack sounds and rom versions
>
>
> >
> > Got the Star Castle working fine, so moved onto the
> AA. I have 2 boardsets, bot seem to be different. Boardset 1
> has a sound board that does not state a game name on it.
> Boardset 2 has a soundboard that states Armor Attack on it.
> > -Boardset 1 works fine, sounds seem to be normal. The
> odd thing is is when a game starts, your jeep is not in the
> center.. it is over on the left side of the central large
> open area. Also, once a helicopter comes out, they
> repeatedly come out as soon as one explodes.... non stop...
> Is this a different version of this game or something messed
> up? All else seems to work as I remember it...
> >
> > -Boardset 2 seems to work fine, except for the
> sounds.. When you start you start in the middle, and
> helicopters have a delay between them so gameplay seems
> correct. The only issue on this is as the tanks speed up,
> the pitch of their engine noise speeds up but it becomes
> very distorted when it does. At its first speed, it sounds
> fine... just as you kill them and it speeds up does it get
> bad. I have replaced all the electrolytic caps on the sound
> board... any ideas what would cause that? Is the engine
> noise 'supposed' to change as they speed up?
> >
> >
> >     
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Received on Tue Jun 2 21:40:41 2009