Re: Gravitar missing some sounds

Yes the chip enables work, replaced R2 with a known good no change.
All Dips register.

Kevin

On Sun, Mar 24, 2013 at 7:48 PM, Douglas Gauck <douglas@gauck.com> wrote:
> If it's not the POKEYs, then maybe the chip enable signals to each POKEY? Do
> both banks of DIPs register correctly? I/O1 (for B3) and I/O0 (for C/D3)
> come from the ROM at R2.
> -Douglas
>
>
> On Mar 24, 2013, at 8:08 PM, Kevin Moore wrote:
>
> I have tried those options no change
>
> Kevin
>
> On Mar 24, 2013 6:30 PM, "William Boucher" <wboucher6@cogeco.ca> wrote:
>>
>> Swap the two POKEY chips (at B3 and C/D3) and see if anything changes.
>> Could be one is bad. If nothing changes, replace LM324 at D5. If nothing
>> changes, replace LM324 at B5. If I knew specifically which of the two
>> POKEY's generates which specific sounds then I could be more specific as to
>> which POKEY or opamp is most likely at fault.
>>
>>
>> William Boucher
>> http://www.biltronix.com
>>
>>
>> ----- Original Message ----- From: "Kevin Moore" <talon.k@gmail.com>
>> To: <vectorlist@vectorlist.org>
>> Sent: Sunday, March 24, 2013 6:54 PM
>> Subject: VECTOR: Gravitar missing some sounds
>>
>>
>>> I've got a Gravitar that is missing the enemy saucer explosions, and
>>> the fuel pick up sounds. I've read that this can be caused by a
>>> Grav-BW-Grav conversion. This is not one of them. I've checked the
>>> resistors, and caps in the sound area and have come up blank..
>>>
>>> Kevin
>>>
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>>
>>
>>
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>
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Received on Sun Mar 24 21:53:31 2013