[Trlog] Help! SBDVP and HP Laptop

[Pete Smith]

At 11:11 AM 11/11/03 -0800, Denny Sahovic wrote:
>This problem has been posted, even before, by few laptop users. I could not
>find the definite answer. Is it something that PnP cards do to DMA? Could it
>be the problem with built in a conflict between built-in MIC on a laptop and
>MIC-IN line? Or is it something in a Windows mixer setting, that doesn't
>work in DOS window? I tried downloadind Yamaha DOS mixer, and I saw all the
>settings for BLASTER, WSS.
>
>I tried few different Laptops (NeoMagic, Yamaha) and ended up with the same
>recording problem. As for running pure DOS setup, you have to be lucky to
>find DOS drivers for the laptop soundcard.


I have had the same problem, even with a desktop, and even when running a 
plain vanilla SB-16 PCI card.  So I think this eliminates a lot of 
laptop-specific or sound-card-specific causes.  On the other hand, I 
routinely run an SB-16 ISA sound card under the same OS, in a DOS window, 
and it records and plays back just fine, thank you.

The only thing I can see is that this card, and maybe other PCI sound 
cards, installs in Win98 both as itself (SB PCI) and as an "SB PCI legacy 
device."  In the former, Device Manager does not identify any DMA channels, 
while in the latter it identifies 2, one for 8-bit and one for 16-bit 
transfers.  At a guess SBDVP is not finding the right DMA channel for input 
when it initializes, but why this happens and how to fix it are beyond 
me.  It's too bad, because SBDVP does such a wonderful job of automating TR 
for phone operation.


73, Pete N4ZR
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