[BUG]: DJbox (Japan) - SCPS-15082 - 56275BE9

spacemul commented 2 years ago

Describe the Bug

Just black screen at start

Reproduction Steps

Just launch the game

Expected Behavior

No response

PCSX2 Revision

1.7.2120

Operating System

Windows 10 (64bit)

If Linux - Specify Distro

No response

CPU

Ryzen 5 3600

GPU

RTX 3070

GS Settings

No response

Emulation Settings

No response

GS Window Screenshots

No response

Logs & Dumps

No response

ghost commented 2 years ago

Same as the other thread, with a blockdump, we can see what is wrong with the game.

spacemul commented 2 years ago

DJbox (Japan) (2021-11-16 20-23-05).zip

ghost commented 2 years ago

Thanks, actually I run out of block if I enable the timing hack or the EE interpreter with the cache enabled, does those options work for you?

spacemul commented 2 years ago

I tried these 2 options but only black screen here on 1.7.2133

Goatman13 commented 1 year ago

Game unpack/decrypt EE overlays with use of FPU. That result in corrupted mips code overlays on pcsx2. This has been tested on different emulator with softfloats available and function that generate inaccuracy is located at 0x128268. Since pcsx2 add/sub is accurate and function don't use div/sqrt/rsqrt, this is most likely mul inaccuracy. Game was additionally tested with old fpu mul mantisa hack, but it is not enough to fix it.

Just in case, it doesn't seems to be clamaping issue.

Reproduction Steps Launch game. Check unpacked code at 0x2821E0, 00282714, etc. This isn't only corruption that happen of course. To additionally confirm issue you can check the same code when game is launched with nearest rounding mode, code is completely broken then (initial jump at 0x100E24).

refractionpcsx2 commented 1 year ago

Yeah I think kr_ps2 looked at this with me and said it did a while decryption routine but pcsx2 is just slightly out a bunch of times which ruins it

Sukotto-1999 commented 1 month ago

Here's my chart of getting DJBox to work on PCSX2:

DJBox is an MP3 mixing game on the PS2. You use the dualshock 2 to mix the sounds.

Here's my chart, the game requires the PSBBN like i mentioned to get it to work. I tried using the HDD FIX on real hardware but no help unless i get PSBBN to work eventually.

Task list for the developers to complete (except for MagicGate)

[ ] Make a complete overhaul on the FPU emulation so EE overlays can be decrypted succesfully and to fix issues in FPU-dependant games.
[ ] Improve TLB emulation so it can boot PSBBN if dump is decrypted and configure the network settings (and access the things on someone's hacked BBN dump like this.)
[ ] MagicGate emulation (to fix the TLB miss for Sony Utility Discs without a hacked version) (this goes into the unofficial fork to minimize case risks like the HD Loader/Modchip case. Unless we get some legal advice from Sony and other subsidiaries.)
[ ] Proper network/HDD LAN (dev9) emulation, to fix network errors.

These are the improvements needed to boot the game and access things that are mentioned in the official trailer of the game.

PCSX2 / pcsx2