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Baron-von-Riedesel / VSBHDA

Sound Blaster emulation for DOS
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Issues with Prehistorik and Prehistorik 2 #15

Open vicokoby opened 4 months ago

vicokoby commented 4 months ago

Prehistorik can't detect Sound blaster with VSBHDA.

Here the game: https://www.old-games.ru/game/106.html

Prehistorik 2 crashes with VSBHDA.

Here the game: https://www.old-games.ru/game/107.html

Sound card used: SBLive! 5.1 / SB0100

Baron-von-Riedesel commented 4 months ago

I'm probably not so much interested in the games itself, but the cracking intro for Prehistorik 2 is interesting - that should really work with VSBHDA.

Baron-von-Riedesel commented 4 months ago

Ok, I got the intro sound to work.

It's FM music that doesn't need interrupts to work. So the program masks all 16 IRQs. OTOH, SBEMU and VSBHDA need the real sound hardware interrupt to always work, for both digital sound and FM sound. And I forgot to protect the master PIC, bit 2 - no interrupt, no music. After protecting both master and slave PIC mask ports ( 0x21 and 0xA1 ), the sound did appear.

The fix isn't uploaded yet.

Btw, for me the program itself doesn't really "crash", actually sound even works to some extend, it's overloaded with a permanent humming, though - and better don't press ESC...

vicokoby commented 3 months ago

@Baron-von-Riedesel I tested the latest version of VSBHDA with Prehistorik 2 and I can confirm that the game no longer crashes. However Prehistorik 1 still cannot detect Sound Blaster.

Baron-von-Riedesel commented 3 months ago

However Prehistorik 1 still cannot detect Sound Blaster.

True. However, IIRC, when the game runs in DosBox it also has problems detecting SB. Probably due to the usage of file CT-VOICE.DRV, which is a file supplied by Creative - it may use undocumented "features".