Time Diver Eon Man repro problems

PhinsPhins
in The Brewery
I've been trying to make a repro of this and have been getting garbled graphics during the intro cutscene text as well as a non-functioning status bar in game. Otherwise things have been working well. Also, if you try to press start immediately after the game turns on as opposed to going into the intro cutscene and then pressing start, it freezes. Did I mess up my wires or something? I am using TLROM. If I'm able to play the game surely it isn't the lack of RAM?

Comments

  • LincolnLincoln
    tlrom is fine. you have an issue with the rom or wiring.
  • PhinsPhins
    The chips verified good before I put them in, so I'm betting it's the wiring. Would it be a problem with CHR or PRG?
  • LincolnLincoln
    if the game and music play fine once you get going, I would suspect chr.
  • PhinsPhins

    Originally posted by: Lincoln



    if the game and music play fine once you get going, I would suspect chr.





    I checked the wiring two times over with fully working MMC3 boards I have on CHR.
  • LincolnLincoln
    check the prg then. look for cut traces or shorts. post pics.



    standard questions: did you try your rom in an emulator? did you verify the donor was working before disassembly?
  • PhinsPhins

    Originally posted by: Lincoln



    check the prg then. look for cut traces or shorts. post pics.



    standard questions: did you try your rom in an emulator? did you verify the donor was working before disassembly?





    Yes, and no. I examined all the traces and they look fine however. I will get pics later.
  • marvelus10marvelus10
    I have always had various luck with MMC3 repros, chips that verify play fine in my test cart and fail once on a permanent board. I have re-soldered over and over sometimes till the board is toast with no luck, then other times I have made them and they work first try. I have wondered in the past if it was different revisions of the MMC3 or speed of the RAM chip or ROM chips, there was a huge debate about this when the Mario Adventure hack first became popular, it was solved with an alternate RAM chip, then later with some ROM hacking. There is some slight difference with MMC3 revisions, however they were never considered a problem, maybe they are.
  • removed04092017removed04092017
    The IRQ's are definitely a problem. The RAM chip is fault of shit programming, the IRQ problem is them using (probably) undefined behavior at the time that they didn't think would be a problem, but was when the NES MMC3 was redone some. Still, any pics of the screen? I know you PM'd me, but I'm on Linux and don't have time to dig out my ROM CD to find the ROM you're talking about.
  • LincolnLincoln
    I opened mine up to inspect. I started with a Bo Jackson cart, TSROM-08. mapper is MMC3B, non-Samsung. RAM has been removed and used elsewhere. Time Diver does not require wram. I used the prototype rom from the GoodNES set. crc32: prg [2ca09230], chr [532784c4]



    while we're on the topic, anyone have a label for this?
  • PhinsPhins
    The prototype ROM from GoodNES is actually erroneous. It's a mapper hack of Time Diver Avenger with a redone title screen. The real proto ROM is in the set with an [a1] designation.

    I'm using MMC3B too. I only just now found out I don't actually have an available camera.
  • removed04092017removed04092017
    Who made the MMC3B?
  • PhinsPhins
    Mine says Nintendo but looks like it has the little Sharp "S" on it too. According to NESDEV if Lincoln's doesn't have the S it would have different IRQ behavior. Perhaps it would be functional instead of broken. Lincoln, care to weigh in?

    I'm thinking this is the only thing it could be, because my wiring job is identical 100% to a previous, perfectly working Sunman board I own.
  • LincolnLincoln
    well that's goddamn annoying. I don't have any more eproms right now to try out the correct rom.
  • removed04092017removed04092017
    No eraser? Hmmm...blacklights normally won't work, has to be a specific wave frequency to get through the quartz, so I guess you just have to wait. What is your chip revision and how does the stamp look on it?
  • LincolnLincoln
    I don't want to tear down the working cart just to get the chips out, especially since I pulled some traces off the first time around. I'll leave that one as is and do another one when I get more chips.



    so nobody has a label?
  • Remembered Old BuddyRemembered Old Buddy
    About to make a thread, Lincoln, if you're looking for a custom one.



    .
  • LincolnLincoln
    Finally got my order of chips. I did a set from the apparent proper rom

    crc32: prg [ad5bcc4c], chr [459c3911]

    I put them in my test cart and they play fine. my test cart is a MMC3C board.



    @chansey if you can come up with a nice label, I'd be happy to put it on a cart and send it your way.
  • GorillazeroGorillazero
    Personal experience, I racked my brain trying to fix a repro and it ended up that the pressure from the cart was pressing too hard against the wires/eproms.
  • riskVSrewardriskVSreward
    I didn't have that prob with Time Diver but came across it with Ghost Hunter. I have to assume it's a board compatibility issue, I think your on the right track about the mmc revisions.
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