THE SERIAL PORT SX/DX
The serial port is located behind the left-hand cover on the rear. To gain access to the serial port, open
the hinged cover.
Fig. 6-3 Locating the Serial Port
Serial ports are often called RS-232(C) ports, which refers to the industry standard for this kind of
interface. Because the serial interface is an industry standard there is a wide range of devices that can be
connected to the serial port. Basically, any device that is listed as a serial device and requires an RS-232
interface can be connected to your 486SX/DX-WinBook. Examples of such devices include a mouse, an
external modem and a serial printer. [SX/DX 6-3]
COM 1 and COM 2
The serial port on your 486SX/DX-WinBook is configured as COM1. The COM2 serial port is used by
the built-in trackball. When you connect a device to your 486SX/DX-WinBook, you will have some
software to configure and run the device. In your software, you must configure the device as being
connected to the COM1 serial port. For example, if you connect a mouse to the serial port, you must
ensure that you use your mouse software to configure the mouse as being connected to COM1.
How to Connect a Mouse
By way of an example, we describe here the simple procedure for connecting a mouse, which is probably
the most commonly used serial device, to your 486SX/DX-WinBook. The procedure for connecting any
kind of serial device will be similar. An increasing number of software packages supports the use of a
mouse, and a mouse can make the operation of such software extremely quick and easy. The most
commonly used mice are serial devices and as such can be directly connected to your
486SX/DX-WinBook. Another kind of mouse is the bus mouse that usually requires a special interface
card. You cannot connect this type of mouse to the serial ports, so make sure the mouse you wish to use
is a serial mouse.
NOTE
The external serial port is COM1, the optional Fax/Modem is COM3. When using a serial mouse
on COM1 there will be a conflict wen using the Fax/Modem on COM3. If it is desired to use both
a mouse and modem together, the best solution is to use the internal trackball or a PS/2 mouse
instead of a serial mouse.
[SX/DX 6-4]
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THE SERIAL PORT SX/DX
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