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Tyrian 2000 in DOS with sound on PCIe only machines? (Announce)

posted by Zyzzle, 24.03.2024, 02:18

> Yes, but this approach is not very promising, I wouldn't spent time on
> this.
> Almost certainly the only fix - besides a fixed BIOS - is an external timer
> source ( that APIC thing! ).
 I see. There's little hope of a fixed BIOS - and trying to disassemble the encrypted BIOS is neigh impossible, so that leaves APIC left !

Also, I did see the crash in Tyrian. It happens at the same time always for me, only when my ship is destroyed - and near the very end of that (and long, loud explosion sound), the system always hard freezes. Something about that sound it doesn't like (amplitude too high? ADPCM compressed format sound > 64 kb perhaps?).

The hard system freeze doesn't happen if I enable the invulnerability cheat. This is done by pressing F2 + F3 + F6 all at once while in the flying mission. Then, the ship never crashes, and the game never crashes... Strange, but true!

Also, I tested another 16-bit protected mode game called 4th Generation. It didn't produce any sounds at all (either digital or OPL3) under the 16-bit version of VSBHDA, strangely - even though its setup program detected Soundblaster correctly.

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