Acer 390 Series Service Manual page 65

Table 2-2 PCI1250 Terminal Functions
Name No. I/O Type Function
SPKROUT Y10 O Speaker Output. This signal is the output to the
host system that can carry the SPKR or CAUDIO
signal through the PCI1250A from the PC Card
interface. This signal is driven as the exclusive OR
combination of card SPKR//CAUDIO inputs.
Major Chips Description 2-19