Message-ID: <8D53104ECD0CD211AF4000A0C9D60AE3013EFC37@probe-2.acclaim-euro.net> From: Shawn Hargreaves To: djgpp AT delorie DOT com Subject: Re: PCI sound card Date: Tue, 1 Jun 1999 11:31:08 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain Reply-To: djgpp AT delorie DOT com > He says it works fine without sound in Windows NT, so my prog itself > is sound. But in Win 95 or DOS it locks up. All I do is reset the SB > with the relevant bits to it's reset port, then read the bytes, by > outing to it's command register, then inning from the data register. > > Is there anything strange about PCI sound cards? Very much so. Most PCI cards aren't actually SB compatible: they just use a software driver to emulate the SB register set. The quality of this emulation is very variable, and it is extremely unlikely that you will find anything 100% compatible with the original. Since the vast majority of sound code uses DMA transfers rather than direct port writes, it is quite possible that they just didn't bother to emulate the mode you are using, or that their support for it is buggy... Shawn Hargreaves.