Dragon's Lair Fans - Arcade Lifestyle

General Chat => Technical Area => Topic started by: ckong on July 21, 2014, 10:50:48 PM

Title: Asteroids problem
Post by: ckong on July 21, 2014, 10:50:48 PM

Hi guys,

my Asteroids suddenly developed a problem, meaning that there are a few diagonal lines on screen. And sometimes the gameplay is also visible, but not always. And also, the testgrid shows up now and then. Level42 did a quick check on it, but the cause is not clear yet. Is anyone familiar with this behaviour?

Like this:

(http://i50.photobucket.com/albums/f307/ckong65/Asteroids/asteroids-diagonalelijnenopbeeldscherm_zps2845b2ce.jpg) (http://s50.photobucket.com/user/ckong65/media/Asteroids/asteroids-diagonalelijnenopbeeldscherm_zps2845b2ce.jpg.html)

Also, the same board developed a problem during last year's Eurocade: the hyperspace button doesn't respond (although contact is made) and when I push the fire button, then I hear a loud beep and the ship goes in hyperspace! On the fire button!!

Title: Re: Asteroids problem
Post by: level42 on July 21, 2014, 10:55:23 PM

I've seen this and I think there's something wrong with the reading of the vector ROM. I've checked all ROMs though and they are OK. A first possible step would be replacing the ROM sockets, starting with the VECTOR ROM.

Don't get the special size ROM sockets, get these strips instead:

http://www.tme.eu/html/EN/sil-socket-strips/ramka_1628_EN_pelny.html

The longer the better, you can break them in the desired size. Do make a good note on the board where the notch of the ROM should be though !!!!

Title: Re: Asteroids problem
Post by: vernimark on July 30, 2014, 04:05:22 PM

no indications from the self test?

Title: Re: Asteroids problem
Post by: ckong on August 07, 2014, 09:25:14 AM

The self test only gives a blank black screen.