Re: Is Matt Rossiter Or Jed Margolin Still Here?

 Hi Brent,

 I haven't tried disabling the pincusion correction on a 'Space Duel,
Gravitar, Black Widow' boardset, but the principle should be the same.
 

 http://games.rossiters.com/Black-Widow-p19.jpg [1]

 http://games.rossiters.com/Black-Widow-p20.jpg [2]

 You can see on Page 19 of the Black Widow Schematics that the
X-Correction output is coming from A/B 11 pin 14 and going to C12 pin
4 on page 20. You can also see the same for the Y-Correction output.
What I remember having to do (on tempest) was to disconnect the X and
Y correction output and apply a fixed voltage to the resistors going
to pin 4, which would be on C11 and C12 according to the Black Widow
Schematics. You might be able to try lifting one end of R181 and
R205, which would be the ends coming from pin 14 of A/B 11 and A/B12,
and connecting them to a 10 volt source as I did with Tempest. Then
after that you'd want to adjust the X and Y Lin pots with the
cross-hatch pattern turned on. At the moment I
don't have the ability
to test this first, but that's what I'd do.

 Has anyone else tried this?

 Matt
 On Tue, 17 Jul 2007 11:24:11 -0700, "Brent" wrote:  Hello
Matt, I came across this article by you.
http://www.ionpool.net/arcade/tempest/tempest_disable.html [3] I
have an Amplifone monitor and Space Duel, Gravitar, Black Widow
boardsets that I am using with it. But of course there is pincusioning
with these boards. My question is do you know how to disable the
disable the pincushion correction on these board? I know that they
all have the same pinout (mostly, as they all work with a Space Duel
harness, except for the controls of course). And Gravitar and Black
Widow use the same boardset just different roms. Or could an adapter
be made of some sort to put inbetween the boardset and the harness?
This is for a very special project that I am working on. Thank you for
your time. Brent

Links:
------
[1]
http://games.rossiters.com/Black-Widow-p19.jpg
[2] http://games.rossiters.com/Black-Widow-p20.jpg
[3] http://www.ionpool.net/arcade/tempest/tempest_disable.html

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Received on Tue Jul 17 18:08:16 2007