Re: Atari Pong - Power up score

Below is the display for each input to the 7448

 _ _ _ _ _ _ _ _ _
| | | _| _| |_| |_ |_ | |_| |_| _ _ |_| |_ |_
|_| | |_ _| | _| |_| | |_| | |_ _| _ |_

 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

I have two boards that at power up display different scores
after you start a game both work fine.

on power up
board one displays
     _ _
  | | | | | |
  | |_| | |_|

board two

  | |_| | |_|
  | |

Can anyone check their board and let me know what is displayed on power up.

Thanks

  -----Original Message-----
>From: teeray <teeray@earthlink.net>
>Sent: Mar 16, 2012 8:37 AM
>To: rasterlist@vectorlist.org
>Subject: Re: RASTER: Atari Pong
>
>
> O +5
> |
> -+-
> 270uF _
> |
> |
> SRST --+------o<|------|----- /SRST
> | |
>pin 10 coin switch ----------/\/\/\----------|-------|>o-----|
> 27 ohm
>
>
>This will not cause a longer coin pulse. The only thing I see is it blowing the inverter.
>
>
>
>-----Original Message-----
>
>From: Rodger Boots
>
>Sent: Mar 14, 2012 10:21 PM
>
>To: rasterlist@vectorlist.org
>
>Subject: Re: RASTER: Atari Pong
>
>
>
>The reset for the score counters comes from the normally closed side of the coin switch...in effect yet another Atari design that was designed to never work from day 1! They probably didn't care that the score came up randomly at power up because the first coin fixed it (and the prototype probably always came up with actual numbers instead of odd characters).
>
>
>Goes right up there with other stupid designs like Sprint 8 (software quit looking at coin inputs if someone pressed the track-change switch) and Breakout (doesn't reset bricks if game started with serve button pressed).
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Received on Fri Mar 16 14:54:28 2012