Re: Gravitar missing some sounds

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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Received on Sun Mar 24 20:48:31 2013