21
INSTALLING AUDIOPCI
TM
SOFTWARE
Driver Files
There should never be a need to use the
Change Driver…
button under the
Driver tab of the ENSONIQ AudioPCI™ Properties window. Always use
the Install Wizard to remove or update the driver files.
PCI Resources
The PCI resources for AudioPCI™ are assigned by the BIOS and should
never be changed in Windows 95. Using the BIOS setup utility, you can
ensure the AudioPCI™ acquires the resources it needs.
Legacy devices, including the AudioPCI™ Legacy Device, use only the
resources available to the ISA bus. The majority of the resources in a
system can be reserved for the ISA bus. Almost every PCI device in a
system can share a single interrupt. Only rare PCI devices, using distrib-
uted DMA, need a DMA channel to be available.
A special note for those who use MS-DOS applications:
Unless you plan on using LPT interrupt sharing reserve IRQ 5 for the ISA
bus to allow the AudioPCI™ Legacy device to acquire it. IRQ 7 is typi-
cally used by the LPT port and IRQ 10 by legacy devices (i.e., scanners
and network adapters). They should also be reserved for the ISA bus. Re-
member that at least one interrupt must be available to the PCI bus. IRQs
11 and 9 are good interrupts to leave for the PCI bus.
Some BIOS setups allow the reservation of DMAs for the ISA bus as well.
AudioPCI™ doesn’t require a PCI DMA, but reserving DMAs 1 and 0 for
the ISA bus will ensure that one of them is available to the AudioPCI™
Legacy Device.
Configuring the ENSONIQ AudioPCI™ Legacy Device
Windows 95 assigns Plug and Play legacy device resources after the BIOS
assigns PCI resources. The ENSONIQ AudioPCI™ Legacy Device requests
the most popular resource settings when installed. The Windows 95 De-
vice Manager allows you to reconfigure the AudioPCI™ Legacy Device
resources, however, so you can easily manage other legacy devices.
Changes made to these settings are also reflected in MS-DOS Mode. If the
ENSONIQ AudioPCI™ Legacy Device is disabled in Windows 95 the
AudioPCI™ will be disabled in MS-DOS Mode.