NEC POWERMATE PROFESSIONAL 9000 Service Manual page 49

The audio subsystem requires up to two DMA channels and one IRQ. Table 1-15 shows the
IRQ, DMA channel, and base I/O address options. These options are automatically chosen
by the Plug and Play interface, so there are no default settings.
Resource
Sound Blaster
(DMA playback, DMA / IRQ
shared with Windows
Sound System capture)
Windows Sound System
(DMA playback)
MPU-401
(IRQ shared with Sound
Blaster)
MIDI
FM Synthesis
CS4236B Control
The system board audio connectors include the following:
T
Rear panel connectors (Line In, Line Out, Mic In)
T
CD-ROM audio (ATAPI and 2 mm)
T
Telephony (ATAPI-style)
T
MIDI/Game port header
T
Line In (ATAPI style).
See Appendix A for the audio subsystem's connector pin assignments.
Table 1-15 Audio Subsystem Resources
IRQ
(Options)
5 (best choice)
7
10 (best choice)
11
5
7
10 (best choice)
11
5 (best choice)
7
10 (best choice)
11
Technical Information
DMA Channel I/O Address
(Options) (Options)
0 (best choice) 210-21Fh
3 220-22Fh (best choice)
230-234h
240-24Fh
250-25Fh
260-26Fh
0 534-537h (best choice)
1 (best choice) 608-60Bh
3
300-301h
330-331h (best choice)
332-333h
334-335h
200-207h
388-38Dh
FF0-FFFh
1-31