Re: Asteroids Help

There are two different versions of the game board, one has a "missing" row
of ICs at row 8. Just subtract the number from the IC to get the correct
one for the schematic, for numbers above X8. e.g. K9 = K8, however, K7 = K7.

I also find the the program IC's are in reverse order, with the -43 being
closest to the CPU on the "missing 8" board and furthest on the original.
Hmmm... There are about five versions of the page 1 schematics as well! I
have most of them, and eventually will get around to sorting out the
differences-unless someone here has the time...

Found one problem on an Asteroids board yesterday, game would "work" with
the pin 1 lifted on the 7442, and turned out the "Stop" signal wasn't
tripping, was a bad 74LS161 for that.

Now I have one that tries to draw a vector (single line in the center of
screen - Y axis) and watchdog is timing out. Game will "play" with pin 1
lifted (7442), but Stop, Start, Go etc. seem to be OK. 9010 claims memory
is good, Logic Comparator not helping. Need to make a signature sheet for
this circuit - like the one for Tempest!

John :-#)#

At 02:18 AM 5/27/00, Matt Rossiter wrote:
>Y'know, I just noticed that the 3 asteroids boards I have are laid out
>differently
>than the schematics show. Which is probably why I'm also seeing different
>signatures than the document. These boards are all marked with the serial
>number
>A034986 -05. Since the address bus is different - are there specific roms or
>anything about this board that I should know about?
>
>Matt
>
>
>
>John Robertson wrote:
>
> > We have tried those signatures and they seem correct. Our board is just
> > beeping and resetting as well...ROM, RAM all test fine on the Cat Box.
> > Trying to figure out the feedback loops from the vector generator-HALT and
> > STOP appear to be running correctly but I don't have sigs for them. Must
> > find a working board to generate more sigs...
> >
> > John :-#(#
> >
> > At 10:58 PM 5/25/00, Matt Rossiter wrote:
> > >Has anyone gone through this signature analysis procedure? I'm not
> sure if
> > >there are some typos in the documentation for C2 and B2 or if my
> Address lines
> > >are really screwed up. For example, I'm actually getting 8484 at C2-9 and
> > >UUUU
> > >at C2-7. The documentation has them reversed. There are a few others
> > >that are
> > >reversed, but I'm using a dead Asteroids board -so it could just be me.
> > >
> > >Would anyone with a working Asteroids board want to confirm that with me?
> > >
> > >The documentation is here -
> > >http://www.gamearchive.com/video/manufacturer/atari/vector/signatures/
> > >
> > >Great documentation though. Makes my life easier.
> > >
> > >Matt
> > >
> > >
> > >John Robertson wrote:
> > >
> > > > Dang, serves me right for not checking GameArchive...there it is in
> living
> > > > B&W. Thanks!
> > > >
> > > > John :-#)#
> > > >
> > > > At 12:47 PM 5/24/00, you wrote:
> > > > >Has any one updated a service FAQ for Asteroids in the last while?
> We are
> > > > >looking for signatures if possible...
> > > > >
> > > > >John :-#)#
> > > >
> > > > John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
> > > > Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
> > > > http://www.flippers.com
> > > > "Old pinballers never die, they just flip out."
> > > >
> > > >
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> > Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
> > http://www.flippers.com
> > "Old pinballers never die, they just flip out."
> >
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  John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
  Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
  http://www.flippers.com
         "Old pinballers never die, they just flip out."

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Received on Sat May 27 12:54:22 2000