2: System Description
22
I/O connectors
The mouse, serial, parallel and keyboard connectors are fitted to
I/O connector positions. These connectors are labelled. See page
76 for diagrams of these connectors.
Mouse connector
This is a 6-pin IBM PS/2 connector for use with a PS/2 style
mouse.
Serial connector
This is a standard 9-pin, D-type serial connector. Use this
connector to connect to a serial device such as an external modem
or a serial printer. The device name of this interface is COM1. If
there are two serial ports then the other device name is COM2.
Parallel connector
This connector is mainly used to connect your computer to a
parallel printer. The connector is a 25-pin D-type connector and its
device name is LPT1.
Any additional parallel ports which have been fitted to your
machine will be identified by their device names; e.g. LPT2.
Keyboard connector
This is a 6-pin socket used to connect a standard IBM PS/2 style
keyboard to the computer.
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