Epson I+ User Manual

The parallel and serial port functions controlled by DIP switch set 2 are

listed in Table 1-3 and described below.

1

2

3

4

Parallel

Primary

OFF

ON

Secondary

OFF OFF

D i s a b l e

ON

ON

Serial

Primary

OFF

OFF

Secondary

ON OFF

Disable

—

ON

Switches 1, 2, 3, and 4 tell the computer how to access the built-in parallel

and serial ports. You do not need to change the factory settings unless you
install an option card with an additional parallel or serial port. If you do

install such an option card, read the following information carefully.

Switches 1 and 2 

port)-tell the computer how to access the built-in

parallel port.

The built-in parallel port functions as either the primary or secondary

parallel port. However, if you install any option card with its own parallel
port, you must set these two DIP switches so there is no conflict between the

built-in parallel port and the added card. Table 1-3 shows you how to set the

DIP switches.

If you install an option card that has only a parallel port, you must

designate this as the secondary port and leave the built-in port as the pri-

mary port.

If you install a video card with a parallel port (such as an IBM mono-

chrome display and printer adapter) you must designate it as the primary

parallel port and the built-in port becomes the secondary parallel port.

If you install two option cards with parallel ports, one is designated as

the primary port and the other as the secondary port. In this case, you need
to set switches 1 and 2 on in order to disable the built-in port.

If MS-DOS searches the system for a parallel port and finds only one, it

names it LPTl:. If there are two parallel ports, it names the primary port
LPTl: and the secondary LPT2:.

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