Hardware Functional Overview 4-17
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Five PCI Memory Windows and two I/O Windows available to each
CardBus socket
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Exchangeable Card Architecture (ExCA) compatible registers are
mapable in memory and I/O space
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Supports Distributed DMA (DDMA) and PC/PCI DMA
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Intel 82365SL-DF Register Compatible
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Supports 16-Bit DMA on both PC Card Sockets
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Supports Ring Indicate, SUSPEND, PCI CLKRUN, and CardBus
CCLKRUN
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Advanced Submicron, Low-Power CMOS Technology
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Provides VGA/Palette Memory and I/O and Subtractive Decoding
Options
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LED Activity Pins
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Supports PCI Bus Lock (LOCK)
Audio Subsystem
The audio subsystem is implemented on the audio board using the ESS
ES1968S (Maestro-2) PCI audio controller chip. An internal two-way mini
speaker and microphone provide the notebook with mobile sound generation
and recording capabilities. In addition, a set of 3.5mm bayonet socket (1/8"
minijack) connectors allow for external microphone, line inputs, and headphone
outputs.
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The ESS ES1968S (Maestro-2) digital audio accelerator is a highly
integrated PCI audio solution that brings advanced audio features to
notebook and desktop systems. These features include a 64-voice
wavetable synthesizer with Downloadable Sample (DLS) and complete
DirectSound acceleration. The Maestro-2 proprietary technology
supports both Microsoft PC97 and PC98 logo requirements and DOS
game compatibility. WaveCache technology reduces the system cost by
storing data in host memory. The data is retrieved using high-speed PCI
bus cycles during playback or recording.
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Microsoft's DirectSound API is accelerated by digitally mixing as many
as 32 PCM streams of any frequency down to a single output stream of
48 kHz. This final buffer can then be piped to any CODEC available to
the system. This acceleration frees up the CPU to perform other tasks.
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The Maestro-2 audio accelerator supports a number of different legacy
audio schemes, including Distributed DMA protocol, PC/PCI DMA, and
Transparent DMA. This ensures complete DOS game compatibility over
the PCI bus.
