Re: Asteroids Help

Ok, here's a little addition to Peter Fyfe's document so that people with later
board sets don't get too confused. I'll make note of any other revisions I find.

This is for board set A034986

AB0 - C2-9 - UUUU
AB1 - C2-12 - FFFF
AB2 - C2-7 - 8484
AB3 - C2-14 - P763
AB4 - C2-5 - 1U5P
AB5 - C2-16 - 0356
AB6 - C2-3 - U759
AB7 - C2-18 - 6F9A
AB8 - B2-18 - 7791
AB9 - B2-14 - 6321
AB10 - B2-9 - 37C5
AB11 - B2-5 - 6U28
AB12 - B2-7 - 4FCA

John Robertson wrote:

> 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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> 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 23:39:04 2000