Re: asteroids vector/watchdog problems

You can't use a TMS2716 to replace standard 2716s. The TMS2716
requires -5 and +12 to work - they were an upgrade for the 2708 and
that direction was dropped eventually by TI. You CAN use a TMS2516 -
that is the same electrically as a regular 2716.

In a pinch you can always use a 2532 - if you can't find a good 2716,
just burn the 2716 image on both the low and high sections of the
2532. This process has been discussed before - google the procedure
if you don't know.

John :-#)#

At 8:44 AM -0400 6/1/06, Rodney M wrote:
>I used a 2716 that was labeled as TMS 2716JL-45. I'm assuming the
>-45 means 450ns and this ROM will not make the grade?
>
>I was just looking thru the r.g.v.a.c archives and I saw something
>about not being able to use TMS 2716 roms on an Asteroids board. Is
>this correct?
>
>Rodney
>
>Rodger Boots wrote:
>>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
>>>
>
>
>
>---------------------------------------------------------------------------
>** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
>** Please direct other questions, comments, or problems to chris@westnet.com

-- 
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
                  www.flippers.com
"Old pinballers never die, they just flip out"
---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com