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Technical Reference Guide
Panel En
L+R Audio
(L)
(R)
Switch
Logic
P23
Headphones/
Line Out
Audio
Bias
Mic In
PCI
Bus
AC’97
Audio
Cntlr.
82801 ICH2
AC97
Link Bus
PC Beep Audio
L+R (Mono)
Audio
+
-
Internal
Speaker
CD Audio (R)
CD ROM
CD Audio (L)
Audio
Bias
Mic In
Line In
(L)
(R)
AD1885
Audio
Codec
HP Out
Audio (L/R)
(L)
(R)
Headphones/
Line Out
TDA
7056
Front Panel Assembly
Desktop/Configurable Minitower Audio Subsystem
Optional on Evo units, standard on workstation
units.
Small Form Factor Audio Subsystem
82801 ICH2
PCI
Bus
AC’97
Audio
Cntlr.
AC97
Link Bus
PC Beep Audio
CD Audio (R)
CD ROM
CD Audio (L)
Audio
Bias
Mic In
Line In
(L)
(R)
AD1885
Audio
Codec
Line
Sense
HP
Sense
Mono
Audio
LA
4301
Equalizer
+
-
Internal
Speaker
HP Out Audio (L/R)
Line Out Audio (L/R)
(L)
(R)
Line
Out
(L)
(R)
Headphones
Out
Figure 5-10. Audio Subsystem Functional Block Diagram
Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Second Edition - January 2003
5-27