NEC POWERMATE PROFESSIONAL 9000 Service Manual page 29

Table 1-2 System Board Feature Components
Chip
Crystal CS4236B
Technical Information
Function
Keyboard and mouse controller:
Industry standard 8042A compatible
General-purpose microcontroller
8-bit internal data bus
By default, the I/O controller interfaces are
automatically configured during boot up. The
I/O controller can also be manually configured
in the Setup program.
Audio codec with an FM synthesizer integrated
on the system board with the following features:
Stereo analog-to-digital and digital-to-
analog converters
Analog mixing, anti-aliasing, and
reconstruction filters
Line and microphone level inputs
ADPCM, A-law, or law digital audio
compression/decompression
Full digital control of all mixer and volume
control functions
High-quality, 16-bit, MPC-II compliant
onboard audio
Full duplex operation
AdLib, Sound Blaster Pro 2.0, Windows
Sound System, and MPU-401 support
Full DOS games compatibility
MIDI/Game port support
OPL3 compatible FM synthesizer
BIOS Setup-based enable/disable
Onboard Crystal CS9236 Wavetable Music
Synthesizer
The audio subsystem requires up to two DMA
channels and one IRQ.
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