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p1pkin / demul

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Bug: Resident Evil 2 wipes any connected VMUs #358

Closed IlDucci closed 8 years ago

IlDucci commented 8 years ago

What steps will reproduce the problem?

  1. Load Resident Evil 2 (PAL, not tested on NTSC)
  2. Wait until the game says "Checking Visual Memory"
  3. Any VMUs that are connected and enabled in the Maple Device Manager will be formatted, erasing any saved games. Any VMUs that are selected in the Maple Device Manager but unplugged (NONE option) will be spared.

What is the expected output? The emulator/game won't wipe any VMUs, so we can load a saved game.

What version of the product are you using? On what operating system? Tested on Demul 0.5.8.2 and 0.7.0 beta 20/12/2015.

p1pkin commented 8 years ago

not tested, but I'd bet its the same as https://github.com/p1pkin/demul/issues/145 try use VMS instead of VMU as workaround (in term of Demul its VMU without LCD and clock) proper fix will be in next build

IlDucci commented 8 years ago

Guess not. Switching VMS to VMU isn't fixing things: The VMS is wiped too.

p1pkin commented 8 years ago

can you share your VMU saves (memsaves folder) and .ini files in emulator's root folder ? bug doesn't happens for me using US version, I'll get PAL one and check it too.

IlDucci commented 8 years ago

RESIDENTEVIL2.zip demul070.zip

The current testing happens with just this save, which is out of the memsaves folder.

p1pkin commented 8 years ago

ok, problem is in yours VMU binary (RESIDENTEVIL2.BIN), game thinks its bad/wrong and format it where/how do you get it ? but you can use saves from there - boot into BIOS, and copy saves to some other empty VMU. after doing this it will be accepted fine by the game.

in general, WinCE games quite strict to various things, so if some VMU-editor program (which you use to import particular saves into VMS binary) makes even single byte wrong and not same as real Dreamcast does - there is chances it will be rejected by game

IlDucci commented 8 years ago

These are savegames from Dreamcast, exported via DreamShell, then El Bucaneros' tool, and then VMU Explorer.

p1pkin commented 8 years ago

well, then VMU Explorer is the problem. probably it does several bytes in service area not the same as normal BIOS-formatted VMU, so game thinks this memory card is damaged or something like that.

p1pkin commented 8 years ago

anyway, game accepted fine your's saved games, after I copied them to other VMU using BIOS, so I close this.

IlDucci commented 8 years ago

Didn't knew WinCE was so picky. Thanks.

p1pkin commented 8 years ago

yes, it is. welcome.