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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

1 2 ... 122 123 124 125 126 127 128

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