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Once again I'll ask if anyone's contacted CGFM about the SH-1 BIOS decap method that was posted on assemblergames. I emailed him several months ago and never got a response, but I don't normally talk to him so that's not unexpected. I know Kale/Haze/others speak to him semi-regularly.

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[13:58:53] <ChrlyMac> I'd need somebody to assist with desoldering the chip and transplanting to another board, as I don't have the equipment to do it
[13:59:10] <ChrlyMac> beyond that it seems doable

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You're a brave man asking this question, but since you have asked, here are a list of games I have that don't work.

Daytona USA (NTSC-J/NTSC-U/PAL-E) - Wants to play the CD-DA rather than the game.

Daytona USA Championship Circuit Edition (NTSC-U/PAL-E) - Goes in-game, but graphics are missing.

Daytona USA Championship Circuit Edition (NetLink Edition) (NTSC-U) - Hangs at the 'SEGA produced by or under license from' screen.

Daytona USA Circuit Edition (NTSC-J) - Goes in-game, but graphics are missing.

DOOM (NTSC-U) - Black screen after the first few logos.

Duke Nukem 3D (PAL-E) - Intro needs to be skipped otherwise the game hangs during the intro. Seems to play ok, but has missing in-game graphics.

FIFA - Road to World Cup 98 (NTSC-U) - MESS crashes right after the very first FIFA copyright info screen at the start

FIFA 97 (PAL-E) - MESS crashes right after the very first FIFA copyright info screen at the start

FIFA Soccer 96 (NTSC-U/PAL-E) - Hangs at the very first FIFA copyright screen.

FIFA Soccer 97 (NTSC-U) - MESS crashes after displaying the first FIFA copyright screen.

NHL 97 (NTSC-U) - Hangs at the loading screen to start demo mode, but if you enter the menu and start a new game it plays fine.

PGA Tour 97 (PAL-E) - Black screen at the start.

Quake (NTSC-U/PAL-E) - MESS crashes after selecting yes or no to a save-game.

Sega Rally Championship (NTSC-J) - Freezes when the game goes in-game with graphic errors, music continues to play.

Sega Rally Championship (NTSC-U/PAL-E) - Freezes when the game goes in-game with graphic errors, music continues to play.

Sega Rally Championship Plus (NTSC-J) - Goes in game, missing textures on cars and some side objects. Music plays fine and the game is playable.

Sega Rally Championship Plus (NetLink Edition) (NTSC-U) - Hangs at the 'SEGA produced by or under license from' screen.

The Need for Speed (NTSC-U) - Goes in game, but half the screen is graphically corrupted so you can't see. The top half is the sky only overlapping the road, and the bottom half is the car and the road only.

VR Virtua Racing (NTSC-U) - Used to go in-game (when?) and ran at about 5fps, now all you get is a black screen.

Last edited by R. Belmont; 11/29/14 01:30 PM. Reason: Let's not copy-paste the same failure for all 3 regions of all the games.
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A multitap for Saturn Bomberman would be great.

I've also noticed that Kyuutenkai got broken with old SVN r22883 (Various CD-ROM / CHDMAN improvements).
Maybe only the CHD has to be reconverted.


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Originally Posted by Kale
Bump.

Thinking about what to fix next:
...
Anything else? I'm open to suggestions that isn't Solo Crisis.

Thanks to the excellent translation on the Snes version, for the first time I can actually play Chaos Seed and have a clue of what I'm doing, however I was unable to get the saturn version to work, so unless the problem is on my side I would be very happy if you could get it up and running as I would very much like to play that version.

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iirc Chaos Seed is the game that tries to read the SH-2 DMA size register and expect it to be zeroed after transfer. And still iirc it fails afterwards anyway, but thanks for the report, another one to look at.

Solo Crisis black screens at new game, no matter what I do. I'm prone to think it's something with master/slave comms going haywire or CD Block. I ... think (and that's very bad as you might guess).

On a general rule of thumb: I'm not going to look at neither blantant CD block nor video bugs, second one has a pending scanline-based rewrite that'll be done once that I can test things on HW, first one once that somebody let me understand wtf is going on with the decap (hint: 2017?).

Last edited by Kale; 11/30/14 12:57 PM. Reason: Grammar matters
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And Doom ... don't think I've ever looked at it seriously, I'd expect something insane tho.

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Originally Posted by Kale
iirc Chaos Seed is the game that tries to read the SH-2 DMA size register and expect it to be zeroed after transfer. And still iirc it fails afterwards anyway, but thanks for the report, another one to look at.

Looking at the console output, it's happily reading from disc and then it outputs a 'Warning: VDP2 version read' and stops reading.

Anyway, if you'd find time to look at it, very much appreciated. Also really impressed at how much MESS Saturn emulation has improved since last time I played around with it.

By all accounts it is a notoriously difficult system to emulate accurately, keep up the great work!

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Originally Posted by R. Belmont
Once again I'll ask if anyone's contacted CGFM about the SH-1 BIOS decap method that was posted on assemblergames. I emailed him several months ago and never got a response, but I don't normally talk to him so that's not unexpected. I know Kale/Haze/others speak to him semi-regularly.

It wasn't decapped, it was interfaced with.


Originally Posted by Kale
first one once that somebody let me understand wtf is going on with the decap (hint: 2017?).

The dump was analysed and, from what I remember, it was found that the yabause wiki already has all the CD block tasks more or less accurately documented.

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Doesn't matter. We intend to run the real SH-1 code as soon as we can get our hands on it, because that's what MAME/MESS does. We run the real code from the 8051 inside the PC/XT keyboard and the 8048 on the XT motherboard that it talks to, even though those are two of the most well-documented chips in the history of computing.

Also, how many games fail due to "more or less accurate"? We'd rather have "guaranteed correct".

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