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Title: Help! Capcom with corrupted graphics Post by: Iwein on October 29, 2009, 06:08:00 AM Hello,
i have a capcom final fight with corrupt graphics. I have only one set so it's not possible to swap boards for testing. At first sight the signals to the eprom's are good. I see no visual dammage or bend pins on the backside from the pcb's. pictures from the graphics in the attachments. Anny sugestions? Greetings from Holland, Iwein Title: Re: Help! Capcom with corrupted graphics Post by: StatFreak on October 29, 2009, 10:57:29 AM Welcome to NLG Iwein :88-
I split your post into a new topic and moved it to the Arcade Games: Video board. Hopefully, one of our members will be able to help you with your issue. StatFreak :31- :nlg- Global Moderator Title: Re: Help! Capcom with corrupted graphics Post by: channelmaniac on October 29, 2009, 02:03:52 PM Ewww...
I hate working on Capcom boards with that problem. CPS1 boards can have that problem show up for a variety of reasons... #1: Look for any physical damage, liquid spills, messed up traces, etc... #2: Check to see if the C board is bad. Push firmly down on the surface mount chip and see if the corruption changes. If so, resolder that big chip. #3: Remove and reseat the boards. #4: Check the board interconnects with a continuity test to see if each pin is making contact. #5: Test each graphics ROM in an EPROM programmer. Compare the checksums against the ROMIDENT database. #6: Swap the A board. It's most likely a problem with the big custom chip there. RJ Title: Re: Help! Capcom with corrupted graphics Post by: Iwein on October 31, 2009, 01:32:40 PM Update:
#1: no damage and evrything looks ok (already done before the first post) #2: no changes when pushing at the surface mount chip, reflowed the solder to be sure, no changes #3: already done before the first post #4: still to do #5: roms tested, compared with romident, OK #6: i have no other boards to swap:-( Only thing left is testing the connectors, if this is test is ok the board goes to the shelf. Greetings and thanks from Holland, Iwein Title: Re: Help! Capcom with corrupted graphics Post by: nightmaretony on May 24, 2012, 04:55:20 AM Looks like sprite addressing to me. the background layer is a set of tiled sprites with a repeating pattern. BEST BET: if the pins are fairly long and sharp on manu chips, cut them down flush with a pair of cutters. Two may be touching which would cause that kind of goofiness, especially in the graphics eprom area.
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