Specifications

SPECIFICATIONS
PP 41x/03x A-17
A.5.9 Port 80 (S1) Pin-outs
Port 80 may be used for debugging purposes and the pin-out for the connector that provides its
output signals is shown below. The connector also includes a Port 81 select signal as the BIOS
writes status information to that port (see Section 9.12).
Pin No. Signal Name
1 GND
2 NC
3 Port 80 Select #
4 NC
5 D3
6 D7
7 D2
8 D6
9 D1
10 D5
11 D0
12 D4
13 +5 Volts
14 Port 81 Select #
# Denotes active low
Table A-13 Port 80 S1 Connector Pin-outs