Thanxs.. Actually I get nothing when I turn it on, a
never ending beep...beep..beep..beeep in test.. If I
ground watchdog I can play blind, test does a solid
tone never ending.
When I play blind, the duh...duh...duh... sound of the
asteroids is about half the speed of normal, but the
firing, ufo...etc sound normal. There was an IC that
one guide said to lift one leg to basically bypass the
watchdog and determine if its MPU related or VSM
related... when I did this, same as above except the
duh..duh...duh... sounds were at normal speed. I have
a pile of stuff coming for the generator section
because its not MPU..pretty much enough to replace
everything 'but' the prom so I hope thats ok...
--- "Matt J. McCullar" <mccullar@flash.net> wrote:
>
> That PROM is part of the vector generator state
> machine. If it goes, the
> board will constantly reset itself and you'd
> probably see wacky vectors
> flashing on and off on the screen.
>
> Coincidentally, I had this very same problem on a
> friend's _Asteroids
> Deluxe_ board just a couple of weeks ago.
> Programmed a replacement and that
> fixed it.
>
> FYI: Atari used the same chip (and the same
> contents) in both _Asteroids_
> and _Asteroids Deluxe_.
>
> Matt J. McCullar
> ******************************
>
>
>
> What exactly would be the symptom if the 63S141 on
> say
> an Asteroids Deluxe was bad? Would it still be able
> to
> play blind? What is stored on it?
>
>
>
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Received on Wed May 2 00:30:30 2007
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