Rampage graphics issue.. HELP!

descrentl

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So I was moving my games around and I turned on the Rampage, and now I have a graphics issue. Double images on some of the characters. I reseated all the chips, but it didnt resolve the issue. Any ideas?
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That's sprite corruption. Not in front of my personal PC atm, so I wish I was more help.

You try the usual? Pull the ROM's, clean the legs and sockets, reseat. If that fails, retouch the solder connections on the ROM sockets (and board-mounted parts).

That's always a good starting point.

Edit: I see you did a reseat. Soldering time is up next, then.
 
Bump this.. I noticed its just moving characters that are double. So obviously a ROM issue as stated above, but anyone know which one would be causing this?
 
You've got something going on with an address line. The signal is either missing or the chip is broken and not using it.
 
Could be a bad ROM... bad socket... hard to say.

Easy way to track something like that down is to use Caesar to find which ROMs are the graphics ROMs. Look the game up in MAWS and at the very bottom of the page for it is a link to the game at Caesar. There you will find a description as to what each ROM is for - main cpu, graphics, sound cpu, etc...

Once you find that start looking at the ROMs. Do they have bent/broken pins? Are they corroded or crusted up? Do the sockets look corroded or crusted up? Do the ROMs have the right checksum? (Do you have an EPROM programmer to check them?) Are there any bad/broken/gouged/corroded traces?

RJ
 
Awesome info man, I really appreciate it. Thanks!


Could be a bad ROM... bad socket... hard to say.

Easy way to track something like that down is to use Caesar to find which ROMs are the graphics ROMs. Look the game up in MAWS and at the very bottom of the page for it is a link to the game at Caesar. There you will find a description as to what each ROM is for - main cpu, graphics, sound cpu, etc...

Once you find that start looking at the ROMs. Do they have bent/broken pins? Are they corroded or crusted up? Do the sockets look corroded or crusted up? Do the ROMs have the right checksum? (Do you have an EPROM programmer to check them?) Are there any bad/broken/gouged/corroded traces?

RJ
 
Once you get beyond those steps you'll want a logic probe to start tracking down the address line issue.
 
I reflowed each of the 4 ROMS that handle foreground graphics, and it didnt help. I was just going to burn new roms, but Im having trouble finding the chip type. In the manual, it doesnt seem to say. I do see P28S600 on the chip, but have no clue what that is. The 4 chips are 4E,5E,6E, and 8E. I think they are 27256's but not 100% sure.
 
Caesar says BG-0 & BG-1 are graphics ROMs... The size of 16384 gets multiplied by 8 to get the size in bits... Those are 128K ROMs (27128/27C128)

FG-0 through FG-3 are graphics ROMs listed as 65536 in the MAME dumps so that size gets multiplied by 8 and you have a 512K ROM. (27512/27C512)

RJ
 
I am bumping this old thread since I don't see another one on this topic. Anyway, I am having some corruption issues myself. See this video: https://www.youtube.com/watch?v=JOCX0OTKpzw&feature=youtu.be

I re-seated the ROMS and cleaned the sockets. I don't have an easy way to check the ROM checksums. Naturally I would love to have someone close by in MA that has a board to compare with.

Thoughts?
 
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I have the same issues as the OP and DZA. Did either person come to a final solution? I'm having hyperneogeo burn me all 12 roms brand new as a shotgun fix. I already replaced the PS with the upgrade kit from arcadeshop and it didn't help.
 
Not yet. It is on the backburner right now. ROM check when I move the game to my basement in April. If a fix is found, please post.
 
Not yet. It is on the backburner right now. ROM check when I move the game to my basement in April. If a fix is found, please post.

I certainly will. Hoping to have the new roms to play with this weekend. Can anyone tell me specifically which ones are related to the graphics? I would like to replace just those ones first to see if it helps so that others don't have to shotgun all 12 roms if they don't have to.
 
bg-0 16384 c0d8b7a5 692219388a3124fb48db7e35c4127b0fe066a289 gfx1
bg-1 16384 2f6e3aa1 ae86ce90bb6bf660e38c0f91e7ce90d44be82d60 gfx1
fg-0 65536 0974be5d be347faaa345383dc6e5c2b3789c372d6bd25905 gfx2
fg-1 65536 8728532b 327df92db7e3506b827d497859980cd2de51f45d gfx2
fg-2 65536 9489f714 df17a45cdc6a9310856d64f89954be79bbeac12e gfx2
fg-3 65536 81e1de40 7e7818792845ec3687b3202eeade60a298ef513e gfx2

according to ceasar these are the graphics files
 
you might want to consider getting a rom burner to test the rom chips. have you checked the roms with the logic probe to see if you have any floating pins or any data or address lines that are fixed. you could also have bad traces coming off them and the chip will be perfect but the data coming out is corrupted. you could have a bad ram chip so the rom data is being corrupted. a quick ugly check is piggybacking a good ram chip on a bad, any change usually means the ram is bad
 
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