Note

Set the DIP switches only while your computer is off. Because software programs check the settings each time you cum on the system, do not change the settings while a program is running.

Your computer has two sets of DIP switches; set 1 contains eight switches which control the computer’s internal operations, and set 2 contains four switches which control the parallel and serial ports. The label inside the DIP switch cover shows the function and factory setting of each DIP switch.

A switch is ON when it is up and OFF when it is down. To change the setting, use a hard, thin object, such as a small screwdriver or a pencil.

DIP Switch Set 1 (Internal Operations)

The following table lists the system functions controlled by each switch in set 1.

DIP switch set I

 

 

 

1

2

3

4

5

6

7

8

Keyboard

Standard

ON

 

 

 

 

 

 

 

type

Enhanced

OFF

 

 

 

 

 

 

 

Coprocessor

Not

installed

ON

 

 

 

 

 

 

 

Installed

 

O f f

 

 

 

 

 

 

RAM size

640KB

 

 

OFF OFF

 

 

 

 

 

512KB

 

 

Off

ON

 

 

 

 

 

256KB

 

 

ON ON

 

 

 

 

Monitor and

Color

(40x25)

 

 

 

OFF ON

 

 

adapter type

Color

(80x25)

 

 

 

ON

OFF

 

 

 

Monochrome

 

 

 

OFF OFF

 

 

 

Enhanced

 

 

 

 

ON ON

 

 

Number of

1

 

 

 

 

 

 

 

ON

ON

diskette

2

 

 

 

 

 

 

 

OFF ON

drives

 

 

 

 

 

 

 

 

 

 

A-2 Changing DIP Switches and Using Setup