Re: asteroids vector/watchdog problems

Make sure the 2716 is fast enough (for example, a 450 nS part won't cut it).

Rodney Minch wrote:

>I've got an Asteroids board (version 06) that I've been trying to get up and
>running. To make a long story short, all new TL081's, TL082's and 4016's in
>the vector section of the board have been installed along with sockets. I
>also replaced one of the game rom's with a new 2716 since it didn't verify,
>replaced/socketed the (6) 2114 RAM's and replaced/socketed the DAC at B12
>since it was causing some really jagged graphics in test mode.
>
>Right now the board watchdogs when in game mode. If I disable the watchdog,
>the game does nothing. In test mode it gives one beep and pushing any of the
>buttons on the control panel gives a beep also. The odd thing is, the test
>screen box only fills up the left hand side of the screen. Adjusting the bips
>on the game board doesn't move the box to the right, it only moves the box off
>the screen to the left. Here is a picture of what test mode looks like:
>
>http://debaser.net/asteroids_test.jpg
>
>The weird thing is, after fixing some bad traces early on, I was able to get
>the game running and I could play it but of course the vectors were all messed
>up although it did fill the entire screen. Then all of a sudden it started
>resetting again.
>
>I know everything in the cab is fine since my Asteroids Deluxe board runs just
>fine in this cab.
>
>Any ideas?
>
>Rodney
>

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Received on Thu Jun 1 03:46:27 2006