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OutRun graphic fault

Printed From: ukVac.com
Category: Technical
Forum Name: Tech, Maintenance & Repairs
Forum Description: Need Help? Ask Here
URL: http://www.ukvac.com/forum/forum_posts.asp?TID=365230
Printed Date: 19 Aug 2018 at 7:01am


Topic: OutRun graphic fault
Posted By: muddymusic
Subject: OutRun graphic fault
Date Posted: 10 Aug 2018 at 11:21am
Any ideas what's causing this? pcb was working fine prior to this, then this fault appeared and has stayed. Voltage is good, running at 5.05v board side.




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Replies:
Posted By: dj_yt
Date Posted: 10 Aug 2018 at 11:25am
This is a most likely problem with a sprite ROM, or accessing the sprite ROMs. 

How are the in-game sprites, they look ok from your screenshot? 


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Posted By: muddymusic
Date Posted: 10 Aug 2018 at 11:38am
The crowd at the start of the game are corrupted, but in game everything is fine apart from the lady's hair.

Just realised I haven't actually done a rom test which should have been first on the list d'oh, I'll do that now!


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Posted By: dj_yt
Date Posted: 10 Aug 2018 at 11:40am
The ROM/RAM test doesn't check the sprite ROMs. 

It will verify the sprite RAM for you though.


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Posted By: muddymusic
Date Posted: 10 Aug 2018 at 11:58am
Yeah that's come back all good. Nothing is affected in game other than the guys in the car and the other bits in the photos. Which roms should I check?


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Posted By: dj_yt
Date Posted: 10 Aug 2018 at 12:10pm
Check the second bank of sprite ROMs:

mpr-10372 ic13 
mpr-10374 ic14 
mpr-10376 ic15 
mpr-10378 ic16

If they all checkout ok, then the problem could be in the circuit that addresses the ROMs itself. 


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Posted By: muddymusic
Date Posted: 10 Aug 2018 at 12:13pm
Ok thanks, will do.


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Posted By: muddymusic
Date Posted: 10 Aug 2018 at 3:59pm
Thanks for the advice - spot on, and all sorted now. Was maskrom 10376 at fault. Replaced and all good now.






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Posted By: dj_yt
Date Posted: 10 Aug 2018 at 4:02pm

Great stuff. If only all fixes were that easy!


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Posted By: smarty
Date Posted: 10 Aug 2018 at 4:03pm
Awesome! Good job.

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Atari Return of the Jedi upright.
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Posted By: Shinydaz
Date Posted: 10 Aug 2018 at 4:11pm
Nice simple fix and great advice

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Posted By: bonehead
Date Posted: 10 Aug 2018 at 4:14pm
I hope my pcb can be a simple fix like that!!!!
Just want to play it more than an hour before it breaks each time.

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Posted By: karlcdoe
Date Posted: 10 Aug 2018 at 4:58pm
Originally posted by bonehead bonehead wrote:


Just want to play it more than an hour before it breaks each time.


Cut your crazy talk :-)

BTW thanks for those speakers, work a charm.


Posted By: nurtuo
Date Posted: 10 Aug 2018 at 5:23pm
Good work Olly, and some excellent guidance from Dave.

How is the US side art printing coming on?


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Posted By: dj_yt
Date Posted: 10 Aug 2018 at 6:37pm
My name isn't Dave, but I'll answer to most things.

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Posted By: nurtuo
Date Posted: 10 Aug 2018 at 6:41pm
Originally posted by dj_yt dj_yt wrote:

My name isn't Dave, but I'll answer to most things.
 


LOL sorry Chris I was thinking of somebody else.

Great work anyway.


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You're Cool, The Engines Hot, The Girl Is Gorgeous, A Tankful Of Gas And An Open Road......The Rest Is Up To You!


Posted By: Outrun2
Date Posted: 10 Aug 2018 at 6:45pm
Originally posted by dj_yt dj_yt wrote:

My name isn't Dave, but I'll answer to most things.

Rodney?

Nice to see it working again, this was the first fault I had on my first OutRun pcb all those years ago. No forums to help me then!

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Would like:
No more cabs.. please!!


Posted By: nurtuo
Date Posted: 10 Aug 2018 at 6:51pm
Originally posted by Outrun2 Outrun2 wrote:

Originally posted by dj_yt dj_yt wrote:

My name isn't Dave, but I'll answer to most things.

Rodney?

Nice to see it working again, this was the first fault I had on my first OutRun pcb all those years ago. No forums to help me then!
 

Its OK Chris you can call me Trigger


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You're Cool, The Engines Hot, The Girl Is Gorgeous, A Tankful Of Gas And An Open Road......The Rest Is Up To You!


Posted By: dj_yt
Date Posted: 10 Aug 2018 at 7:16pm


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Posted By: Flinnster
Date Posted: 10 Aug 2018 at 8:26pm
Epic save Chas! Big smile


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Posted By: muddymusic
Date Posted: 10 Aug 2018 at 9:07pm
Originally posted by nurtuo nurtuo wrote:

Good work Olly, and some excellent guidance from Dave.

How is the US side art printing coming on?

It's all done and I've got sets printed ready to send out Smile
https://www.arcadeartshop.com/product/outrun-upright-side-art-pair-usa-cabinet/" rel="nofollow - https://www.arcadeartshop.com/product/outrun-upright-side-art-pair-usa-cabinet/


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