Re: Inverting just one axis on an Asteroids board

----- Original Message -----
From: "Doug Jefferys" <dougj@hwcn.org>
To: <vectorlist@synthcom.com>
Sent: Monday, April 01, 2002 1:32 PM
Subject: VECTOR: Inverting just one axis on an Asteroids board

> On Sun, 31 Mar 2002, Marc Alexander wrote:
> > From: "Phil Morris" <phil@morris0.fsnet.co.uk>
> > > >Does anyone know if an Atari Asteroids has an undocumented INV Y on
it?
> > > >I'd like to put Asteroids back in it when I get a board to suit, and
> > > >was wondering if it has an INV Y input I can use without modding the
board.
> > >
> > > According to some information in this message:
> > >
> >
http://groups.google.com/groups?q=asteroids+%22inv+y%22+group:rec.games.vide
o.arcade.collecting&hl=en&scoring=d&selm=6cs3q0%2414q%40
> > crchh327.us.nortel.com&rnum=6
> > >
> > > Both X and Y are combined on pin 19 on an Asteroids board. Maybe they
could
> > > be separated earlier on in the circuit? I don't know. Haven't tried
it. No
> > > doubt more knowledgeable folks than I can advise. :)
> >
> > Thanks Phil, I use google all the time, but didn't think of it to do a
> > search of newsgroups! I was wondering why Asteroids only had INV X
> > listed on spies, now that I see it, INV XY together seems more
> > sensible.
>
> First off, props to Gregg for correcting me 4 years ago ;-)

Believe it or not I'm still alive but now I've got *3* kids as well as 2
jobs! Now I'm mostly a lurker...

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Received on Mon Apr 1 20:03:21 2002