Now this HAS to be an Eprom problem

Zinfer

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But which one? I know I've called the problem on my Pac a Prom/Eprom problem and Riptor set me straight on it. But this just has to be an Prom/Eprom issue. Ran a video of it last night to help in the description.
I prolly need to run the checksums to see what I come up with.

http://www.youtube.com/user/zinfer1?feature=mhum
 
I ran through the on-screen setup, opened up the back of the cabinet. I initially found the volume was turned all the way off. It reports the Sound CPU Good and 157 sounds. I went through a few of them. Some don't appear to be present.
My eprom eraser is in Chicago on it's way here so if it does turn out to be an Eprom I can't really do anything about it at present. Still, it wouldn't hurt to pull the board out and run a check on it.
 
When I recently had a sound problem with Burgertime, I got some sounds, but had some missing. I build an audioprobe and was able to confirm that all the sounds were being generated, but some weren't making it to the amp. I eventually found a broken -5v trace to one of the chips right before the amp, and that fixed the problem...
 
I'll take a look at the traces. I pulled the sound board and cleaned it up. Pulled the only Eprom on there at 2K, but can't seem to find anything about it on a search. It's a 27C512. The checksums coming up with 003914FF.
I'll take a further look at the traces on the SA Audio PCB Assy. May also have to take a look at this 'HouseQuake' pcb.
 
So I take it the audio is actually coming from the Main PCB? I removed the Housequake pcb and cleaned it up. Really not much there, the sucker is built like a tank and all traces look good on both boards.
This has to be one of the strangest Atari cabinets I've opened up, being a circa 1987, the PCB has really shrunk quite a bit. Probably multilayered as well and more difficult to work on. No longer any AR2. And that Sharp monitor - when I first saw it I thought it was a donkey kong monitor. The cabinets' also built in a way that makes it difficult to get two hands in there.
Just out of curiosity is there anyone that does boardwork on Blasteroids PCB's?
I'm still plugging away, but if there's a fallback I'll take it.
 
What checksum is that? Is it a 32-bit CRC? If not, you'll need to run a saved image of it through ROMIDENT to see what it says the ROM is. If it doesn't know, it'll give you the 32-bit checksum which you can use to search Google for answers.

That checksum you listed doesn't match any of the 32-bit CRC ROM checksums for Blasteroids.
 
Apparently winromident doesn't like Vista very much. I've tried running it but it stops just as quickly as it starts, with the message 'WinROMident has stopped working'. It worked that time- I ran it in compatibility mode with XP and then win95. The Win95 compatibility seems to have worked.
Let me muddle with this a bit I'll need to figure out how to dump the image.

What checksum is that? Is it a 32-bit CRC? If not, you'll need to run a saved image of it through ROMIDENT to see what it says the ROM is. If it doesn't know, it'll give you the 32-bit checksum which you can use to search Google for answers.

That checksum you listed doesn't match any of the 32-bit CRC ROM checksums for Blasteroids.
 
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Romident can't run in a 64bit windows environment. Not the dos version anyways.
 
Well I loaded the Eprom up in WinRomident and got the following result. When I loaded the Eprom up and then saved it, it asked me to assign a name, I just called it sound.bin. Then loaded that file up into Winromident with the following results. I also attempted the same in Mame with 'mame sound.bin -romident and it reported the same:

sound.bin: (1/1) [D2212C0A]
- VIN.SND : Vindicators (Atari)
- 1124-2k.059 : vindictr:Vindicators (rev 5):Atari Games
- 1124-2k.059 : vindicte:Vindicators (Europe, rev 5):Atari Games
- 1124-2k.059 : vindictg:Vindicators (German, rev 1):Atari Games
- 1124-2k.059 : vindice4:Vindicators (Europe, rev 4):Atari Games
- 1124-2k.059 : vindict4:Vindicators (rev 4):Atari Games
- 1124-2k.059 : vindice3:Vindicators (Europe, rev 3):Atari Games
- 1124-2k.059 : vindict2:Vindicators (rev 2):Atari Games
- 1124-2k.059 : vindict1:Vindicators (rev 1):Atari Games
 
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I'm pretty sure that Vindicators 1124-2k.059 is not supposed to be on this sound board eprom chip for Blasteroids at position 2K. The question I have is which Rom file belongs with this chip? Or did Vindicators and Blasteroids share the same Eproms on this sound board?? Something's screwy here.
Woops - I think I just found it:

============================
1135-2k.057: (1/1) [BAA8B5FE]
- 057-1135 : Blasteroids (Atari)
- BLSTROID.SND : Blasteroids (Atari, set 2)
- 1135-2k.057 : blstroid:Blasteroids (rev 4):Atari Games
- 1135-2k.057 : blstroi3:Blasteroids (rev 3):Atari Games
- 1135-2k.057 : blstroi2:Blasteroids (rev 2):Atari Games
- 1135-2k.057 : blstroig:Blasteroids (German, rev 2):Atari Games
- 1135-2k.057 : blsthead:Blasteroids (with heads):Atari Games

Is anyone else thinking that someone replaced the blasteroids sound card with a Vindicators sound card and called it done? Or am I imagining things?
 
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Do the eproms have a label or anything on them?

It's strange that the test is saying everything's cool... do the sounds that DO work sound like the right sounds?
 
The Eprom out of the sound board at position 2k I'm testing is labeled
1988 Atari
8809
136059
1124

After playing a little bit of Mame Vindicators, the sounds I'm hearing are definitely from that game. I'm going to say that the Rom label should read 1135 and guess that someone replaced the sound board with a Vindicators soundboard and never changed or updated the Eprom. There's also a Prom on that board which, if it needs changed, I'm going to be stuck on that one because my Eprom burner doesn't do proms.
 
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Burn a replacement EPROM with the right code. It's not going to work right with that wrong chip in there. ;)

Sounds like someone did replace the board with another one but forgot to swap the chip over.
 
I was wondering why the sounds in your video clip didn't sound like what I remember Blasteroids as sounding like...
 
If I had any extra 27C512's I would just burn fresh, but I don't have any spares.

Makes me wish I payed more attention to the shipping details when I ordered the eprom eraser through amazon. I had no idea it was shipping from Hong Kong, China AND shipping via USPS. I should recieve it in the next fiscal 2 mos. I suppose.

Detailed Results:

. Processed through Sort Facility, October 03, 2010, 8:40 pm, CHICAGO, IL 60701
. Foreign International Dispatch, September 29, 2010, 12:47 pm, HONG KONG AIR MAIL CENTRE, HONG KONG
. Origin Post is Preparing Shipment
. Foreign Acceptance, September 24, 2010, 3:22 pm, HONG KONG
 
You can do what I did and build an eraser out of a CVS germicidal light and a little metal (smoker bbq wood chip) box. The light cost $20.

I'm not sure how well it works - it DOES work however it seems like these ancient 2716s I seem to reuse a million times take FOREVER to erase. 30+ minutes.

Just don't look at the light, I can't imagine they sell these things for people to just use wherever - the light's not good for your eyes!

I cut a slot in the top of the metal box, laid the light on it, then used electrical tape to seal up all the gaps and mount it to the lid. Now I just lift the light/lid combo off, places the chips inside, put the lid back on and turn it on.

Its been dubbed the "Ez bake eraser" by another KLOVER...I call it the BBQ eraser :)

I'm prob getting a better one though, have tons of chips to erase.
 
PM me and let me know how many 27C512 you need and I will make you a deal on them.
I did check out your clip but having never played blasteroids I had no idea what it should sound like. I could burn the roms for you too if you like.
 
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