Compaq 164SX user manual Multipurpose Connector Pinouts, J20

Multipurpose Connector Pinouts

Table 4–14 Multipurpose Connector Pinouts (J20)			(Sheet 2 of 2)
Pin	Signal	Description
5	HD_PU	Hard drive power-up
6	HD_LED	Pull-up to Vdd
7	—	No connection
8	POWER_LED_L	Pull-up to Vdd
10, 12, 14, 16	Gnd	—
9	SPKR	Speaker output
15	Vdd	—
11, 13	—	No connection

Figure 4–1 Multipurpose Connector Pinouts

HD_PU

SPKR

Vdd

	J20
1	2
3	4
5	6
7		8
9		10
11		12
13		14
15		16

HALT_BUTTON

RESET_BUTTON

HD_LED

POWER_LED_L

4–10AlphaPC 164SX Connector Pinouts