MediaForte SF256-PCP, User Manual

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User Manual
Why are two interrupts allocated for my SF256-PCP
sound card?
The PCI audio uses one PCI interrupt for operation. Additional
IRQ is used for ISA legacy support.
One PCI IRQ is needed for the audio to function under a PnP
operating systems such as Windows 9x. An additional ISA IRQ is
dedicated for legacy audio support. Legacy audio support is used
for DOS based applications and games that are SoundBlaster
compatible. Most DOS based applications and games only use
SoundBlaster compatible legacy audio requiring the use of a ISA
IRQ. By disabling the ISA legacy audio support in the operating
system the dedicated ISA IRQ is freed, thus using only one PCI
IRQ. DOS Applications and games that require SoundBlaster
Audio support will have no audio output if ISA legacy audio is
disabled.
Another way to save one IRQ is to make the BIOS assign IRQ5 or
IRQ7 or IRQ9 to SF256-PCP PCI Audio. This way, ISA legacy
audio can also be supportd via SF256-PCP PCI Audio. Please
refer to the BIOS user manual of your motherboard to see the
details on how to allocate the IRQ to PCI slots.
What happened if my SF256-PCP sound card and driver
are both properly installed, yet, there is still no sound?
If the SF256-PCP PCI Sound card drivers are properly installed
with no conflicts, yet there is no sound, the problem may be with
your audio connections. Here are some suggestions:
1. Try playing both WAV file and MID file to ascertain that
there is no sound at all coming from the speakers. If you
hear one and not the other, the problem is internal and has
nothing to do with your audio system.
2. Be sure that your speakers system is properly set up. Try
connecting a sound source CD audio player other than
SF256-PCP and establishing whether or not you can hear it.
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