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Re: SBEMU: Sound Blaster emulation on AC97

With IO port trapping to 0x40-0x47, we can skip the reprogramming part, but with or without port trapping of the timer, the most tricky part is how to override and call games' handler in a reliable manner. Yes, You would have to prevent client software from being allowed to change int handler, can …

Re: SBEMU: Sound Blaster emulation on AC97

You mean reprogramming the timer again after game runs? With IO port trapping to 0x40-0x47, we can skip the reprogramming part, but with or without port trapping of the timer, the most tricky part is how to override and call games' handler in a reliable manner. And the hack is too dirty - SBBEMU …

Re: SBEMU: Sound Blaster emulation on AC97

The initial code of SBEMU also uses timer, but the sound FX will have more latency, even pops and cracks. and SBEMU cannot program the timer since usually games will do that. so the interrupting rates is fully dependent on games, which is not good. wouldnt hijacking 0x40-47 timer accesses solve …

Re: Aweutil /EM option - speed sensitive

Which version of AWEUTIL are you using? Try to use the latest one. AWEUTIL likes higher CPU speeds. The BIOS must not trap the NMI first. AWEUTIL stays earlier if not on top of the NMI handlers chain. Either for some reason the NMI vector in the interrupt table is overwritten back with the BIOS …

Re: SBEMU: Sound Blaster emulation on AC97

dj_pirtu wrote on 2023-10-14, 12:49: Thinkpad T42p and no sound so far. Tried demoscene: Verses and Drift, both don't detect sb pro and crash if forced. Next I'll try games. Don't have DOS/Win98 yet on this so booting from floppy. Have you checked if there is sound at headphones connector?

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