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Chapter 10—Video and Audio
PCI Versus ISA Sound Cards
PCI cards have become the best choice recently for all types of
upgrades, including sound cards. Compared to ISA cards, PCI cards
are faster, have a lower CPU utilization rate, and use fewer hardware
resources (see Table 10.27). Compare the configuration of the
Sound Blaster 16 card with the native configuration for an
Ensoniq-chipset PCI sound card.
Table 10.27 Default Resource Assignments for ISA and PCI Sound
Card in Native and Emulation Modes
Card DMA DMA
Onboard Device IRQ I/O (16 Bit) (8 Bit)
Sound Blaster 16—ISA Bus
Audio 5 220h-233h 5 1
MIDI Port — 330h-331h — —
FM Synthesizer — 388h-38Bh — —
Game Port — 200h-207h — —
Ensoniq Audio PCI—PCI Bus Native Mode
Audio 11 DC80-DCBFh — —
Game Port — 200h-207h — —
Ensoniq Audio PCI—PCI Bus Legacy (SB Pro) Mode
Audio 7* DC80-DCBFh — —
MIDI Port — 330h-331h — —
FM Synthesizer — 388h-38Bh — —
(Ensoniq SoundScape) — 0530-0537h — —
Game Port — 200h-207h — —
*Shared IRQ with printer port; allowed by Ensoniq driver
While the Ensoniq Audio PCI card uses only one IRQ and one I/O
port address in its native mode, if you have software (mostly older
Windows and DOS game/educational titles) that requires Sound
Blaster Pro compatibility, the Legacy settings must also be used.
However, if you are not running Sound Blaster–specific software (all
your software is native Windows 9x, for example), you might be
able to disable the Legacy mode for a PCI-based sound card.
Multifunction (Modem and Sound) Cards
Multifunction cards that use DSP (digital signal processor) technology,
such as IBM Mwave-based cards, can be very difficult to install
in today’s IRQ-starved systems. These cards typically combine a