Nitro Ball PAL chip replacement
- kyapiko
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Nitro Ball PAL chip replacement
Hi Everyone,
I just got a Nitro Ball pcb.
I noticed that there were graphical problems such as no background and bad colors on some sprites.
I looked at the pcb, cleaned everything and found that a PAL chip (noted PAL16L8A on the board) was plugged upside down.
I plugged it on the right side but the problem was still there.
It is the red marked chip on this pic:
When testing the pcb without it the backgrounds are back but the sprites are gone.
Here are the results with the "suspect" chip plugged:
And pics of the same stuff with the "suspect" chip unplugged:
I suppose the chip is down due to the fact it was plugged on the wrong side or maybe it is not the right one ? (it seems to have been replaced by somebody as it looks cleaner than the other ones)
As it is a programmable chip, I wonder if there would be any way somebody could provide a properly programmed one ?
Thank you in advance !
I just got a Nitro Ball pcb.
I noticed that there were graphical problems such as no background and bad colors on some sprites.
I looked at the pcb, cleaned everything and found that a PAL chip (noted PAL16L8A on the board) was plugged upside down.
I plugged it on the right side but the problem was still there.
It is the red marked chip on this pic:
When testing the pcb without it the backgrounds are back but the sprites are gone.
Here are the results with the "suspect" chip plugged:
And pics of the same stuff with the "suspect" chip unplugged:
I suppose the chip is down due to the fact it was plugged on the wrong side or maybe it is not the right one ? (it seems to have been replaced by somebody as it looks cleaner than the other ones)
As it is a programmable chip, I wonder if there would be any way somebody could provide a properly programmed one ?
Thank you in advance !
- Rossyra
- Supermod
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Re: Nitro Ball PAL chip replacement
It can be replaced if you can find a dump of the correct PAL. You might be able to extract one from MAME.
- kyapiko
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Re: Nitro Ball PAL chip replacement
Thanks Rossyra.
I downloaded the rom for MAME but I must say I don't really know how to identify the right file to dump nor the way to program that chip.
There is a picture of a working pcb at this address:
http://www.wolfgangrobel.de/arcadereps/ ... ll_pcb.jpg
The chip that interests me is identified as "VB-04" but I can't find something of the same name in the MAME rom set.
Do you know how I could proceed ?
I downloaded the rom for MAME but I must say I don't really know how to identify the right file to dump nor the way to program that chip.
There is a picture of a working pcb at this address:
http://www.wolfgangrobel.de/arcadereps/ ... ll_pcb.jpg
The chip that interests me is identified as "VB-04" but I can't find something of the same name in the MAME rom set.
Do you know how I could proceed ?
- trmatthe
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Re: Nitro Ball PAL chip replacement
I just looked in the mame-0149 ROM set and unfortunately 16L isn't dumped. They have the fusemap for JN-00 @ 17L which is the only PLD they seemed to have dumped.
- Rossyra
- Supermod
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Re: Nitro Ball PAL chip replacement
Gonna need a dump of the PAL in order to fix it, or a donor from another Nitro Ball.
- kyapiko
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Re: Nitro Ball PAL chip replacement
Thanks guys for your help.
So if I find somebody who have a Nitro Ball pcb, I can dump the chip then reprogram a new one ?
So if I find somebody who have a Nitro Ball pcb, I can dump the chip then reprogram a new one ?
- Rossyra
- Supermod
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Re: Nitro Ball PAL chip replacement
You need a programmer capable of reading a PAL (Boardmaster 4000 for example). Porchio has offered to dump PALs in the past (for the excellent PAL archive he runs). He's a top bloke, I'm sure he would do it for you if you asked nicely
That is of course assuming you can find one.
That is of course assuming you can find one.
- cools
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Re: Nitro Ball PAL chip replacement
Great game.
- kyapiko
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Re: Nitro Ball PAL chip replacement
Thanks a lot Rossyra.
I will try to get in touch with Porchio.
I would love to have this great game running properly
I will try to get in touch with Porchio.
I would love to have this great game running properly
-
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Re: Nitro Ball PAL chip replacement
Best thing to do is store the board until a PAL dump can be acquired. Not really a game I've seen for sale but someone may be kind enough to lend theirs for dumping or perhaps be able to dump it themselves
- kyapiko
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Re: Nitro Ball PAL chip replacement
Porchy kindly sent me a chip with the dumped VA-04 PAL chip from Elgen's Wizard Fire PCB (which use the same system).
I plugged it instead of the VB-04 defective chip on my Nitro Ball PCB and the graphics now works perfectly !
Here are the same pics than on my first post with the VA-04 chip plugged:
Thanks so much guys !
I plugged it instead of the VB-04 defective chip on my Nitro Ball PCB and the graphics now works perfectly !
Here are the same pics than on my first post with the VA-04 chip plugged:
Thanks so much guys !
- Elgen
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Re: Nitro Ball PAL chip replacement
That's awesome };-P
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- Rossyra
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Re: Nitro Ball PAL chip replacement
Told you he was a top bloke.