Module Jumpers - Digital Equipment AlphaStation 500 Series User Information

Table G-3 CD Connector Pinouts
Pin
1
2
3
4

Module Jumpers

The sound card uses jumpers located at J9 to select the motherboard sound routing and to
set the card's bus address.
The TCE (timer-counter enable) jumper determines whether or not sounds generated on
the motherboard go to the speaker. The TCE jumper is factory-set to allow beeps to go to
the speaker (jumper in), as listed in Table G-4 below:
Table G-4 TCE Jumper
Pin
TCE IN J9 (1-4)
TCE OUT
(D) = Factory default
The SW1 and SW2 jumpers determine the base address of the audio module. These are
factory-set (both jumpers in) and should only be changed when the address conflicts with
another option's address. See Table G-5.
Table G-5 SW1 and SW2 Jumpers Audio Module Base Address
SW1 J9(2-5)
OUT
OUT
IN
IN
Signal
Left channel
Ground
Ground
Right channel
Signal
Motherboard beeps to speaker (D).
Motherboard beeps are ignored.
SW2 J9(3-6) Base Address
OUT x604
IN xF40
OUT xE80
IN x530
AlphaStation 500 Series User Information G-3
Sound Card Overview