Search found 64 matches

by porchio
April 23rd, 2014, 9:23 pm
Forum: Game Hardware Q&A
Topic: Turtles in Time PAL Chip PAL20L10ACNS
Replies: 6
Views: 1483

Re: Turtles in Time PAL Chip PAL20L10ACNS

coolmod wrote:Well, lets just say it will allow people to get their hands on the game without paying $400 for one, but I need to find someone who will lend me the chip or the board first heh.
So are you wanting this chip to create conversions?
by porchio
March 7th, 2014, 7:44 am
Forum: Game Hardware Q&A
Topic: Bootleg PCB King of dragons GAL20V8
Replies: 8
Views: 2195

Re: Bootled PCB King of dragons GAL20V8

Generally PLDs run quite hot. Where was the short on the chip? Something else to keep in mind, just because the continuity tester beeps doesn't necessarily mean there is a short. What was the resistance? I recall on my Silent Scope boards the resistance between VCC and GND was about 16ohms so the co...
by porchio
February 20th, 2014, 7:44 am
Forum: Game Hardware Q&A
Topic: Nitro Ball PAL chip replacement
Replies: 12
Views: 2719

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
by porchio
February 9th, 2014, 4:42 pm
Forum: Game Hardware Q&A
Topic: sega system 16A pal chip Help
Replies: 8
Views: 2046

Re: sega system 16A pal chip Help

That chip isnt a PAL chip but a CK2605 which is a cut down PLS153 used by Sega.
That said it looks to be easily compiled for a GAL16V8.
You have PM
by porchio
March 17th, 2013, 6:56 am
Forum: Game Hardware Q&A
Topic: leonardoliveira & Idc's clean decrypted roms
Replies: 725
Views: 144412

Re: leonardoliveira & Idc's clean decrypted roms

That's one of the ones I did, the other were 1944 and SFZ2.
I dont own much cps2 stuff anymore but it was good fun messing around with stuff.
by porchio
March 16th, 2013, 5:23 pm
Forum: Game Hardware Q&A
Topic: leonardoliveira & Idc's clean decrypted roms
Replies: 725
Views: 144412

Re: leonardoliveira & Idc's clean decrypted roms

I made that program quite a while ago now (06/02/2011 according to Windows timestamp). I since learned how to decrypt my own ROMs to some degree using the method that compares to another set but different region. It worked well but obviously there are limitations. The checksum thing didn't even ente...
by porchio
March 16th, 2013, 11:39 am
Forum: Game Hardware Q&A
Topic: leonardoliveira & Idc's clean decrypted roms
Replies: 725
Views: 144412

Re: leonardoliveira & Idc's clean decrypted roms

not quite. The main issue with phoenix sets is the alleged "unknown" changes that were apparently made.
My program worked fine for me but i only used it on a couple of sets i actually had hardware for. I wouldnt really recommend anyone use it, especially not now there is a far better alternative
by porchio
March 16th, 2013, 8:09 am
Forum: Game Hardware Q&A
Topic: leonardoliveira & Idc's clean decrypted roms
Replies: 725
Views: 144412

Re: leonardoliveira & Idc's clean decrypted roms

Yeah, it wasn't really meant to be used for much good really.
It was mainly wrote to teach myself programming and since I was messing with cps2 stuff at the time I thought it would be fun.
it just replaces the jump to that phoenix menu with the code that was originally there.
by porchio
February 22nd, 2013, 5:15 pm
Forum: Game Hardware Q&A
Topic: Sega FD1094 games
Replies: 3
Views: 869

Re: Sega FD1094 games

I've been given permission by Dion to add all the ones he created some time ago so will update the list a bit. Thanks for any help people have offered so far
by porchio
February 21st, 2013, 6:27 pm
Forum: Game Hardware Q&A
Topic: Sega FD1094 games
Replies: 3
Views: 869

Sega FD1094 games

After a little help from anyone who can. Runik is currently decrypting FD1094 titles so we can freely desuicided our games. As we don't have many boards available to us to test we are looking for help. The ROMs are available on my site. There isn't too many at the moment but more will be added if re...
by porchio
February 13th, 2013, 8:05 pm
Forum: Game Hardware Q&A
Topic: Bubble Bobble Bootleg info
Replies: 478
Views: 135007

Re: Bubble Bobble Bootleg info

I sure did
by porchio
February 13th, 2013, 6:50 pm
Forum: Game Hardware Q&A
Topic: Bubble Bobble Bootleg info
Replies: 478
Views: 135007

Re: Bubble Bobble Bootleg info

finally got round to desoldering my roms and replacing them with this. Excellent work, loving it.

Thanks
by porchio
February 8th, 2013, 9:36 pm
Forum: Game Hardware Q&A
Topic: Rainbow Islands repair help
Replies: 16
Views: 2314

Re: Rainbow Islands repair help

I have now reproduced the PAL chip B22-07 (PAL20L8) if you need it.
by porchio
January 19th, 2013, 8:31 am
Forum: Game Hardware Q&A
Topic: Rainbow Islands repair help
Replies: 16
Views: 2314

Re: Rainbow Islands repair help

You are correct, all the address lines on those RAMs are connected.
What are pins 8, 9 and 10 of that 74F00 doing on your board?
by porchio
January 19th, 2013, 6:53 am
Forum: Game Hardware Q&A
Topic: Rainbow Islands repair help
Replies: 16
Views: 2314

Re: Rainbow Islands repair help

The CPU has read write access to the object ram, well it does on startup at least. If you look at the dissassembly the code is writing a value to the ram, it them reads it back and compares it. If its different then the object ram error is displayed. The object ram starts at $D00000 so address lines...
by porchio
January 18th, 2013, 7:33 pm
Forum: Game Hardware Q&A
Topic: Rainbow Islands repair help
Replies: 16
Views: 2314

Re: Rainbow Islands repair help

I think the address decoding is done by the PAL20L8 at location IC56 but ill check more thorough later
by porchio
January 18th, 2013, 4:55 pm
Forum: Game Hardware Q&A
Topic: Rainbow Islands repair help
Replies: 16
Views: 2314

Re: Rainbow Islands repair help

Don't suppose you have access to a fluke 9010 do you?
by porchio
January 17th, 2013, 7:52 pm
Forum: Game Hardware Q&A
Topic: Rainbow Islands repair help
Replies: 16
Views: 2314

Re: Rainbow Islands repair help

Had a look at the RAM on mine.
Image

All of PIN 21 (/WE) locations are marked on my second masterpiece
All PIN 20 (/OE) are tied to GND
All PIN 18 (/CS) go to PIN 8 of IC48 (74F00)
by porchio
January 16th, 2013, 7:50 pm
Forum: Game Hardware Q&A
Topic: Rainbow Islands repair help
Replies: 16
Views: 2314

Re: Rainbow Islands repair help

No problem, ill check it out when I get some time at it, unless anyone else can help
by porchio
January 4th, 2013, 9:31 pm
Forum: Game Hardware Q&A
Topic: Bubble Bobble Bootleg info
Replies: 478
Views: 135007

Re: Bubble Bobble Bootleg info

I'm looking forward to trying this when I get some free time again.
just a question though. All of the patches you have posted, do they ALL need to be applied or do I just need to apply the later ones?

thanks for your work on this, very impressive